Answer:
many milliliters of 1.50 M HCl(aq) are required to react with 5.05 g Zn(s)?
volume: 16 mL
First, we need to calculate the number of moles of Zn:
m(Zn) = 5.05 g
M(Zn) = 65.38 g/mol (molar mass of Zn)
n(Zn) = m(Zn) / M(Zn) = 5.05 g / 65.38 g/mol = 0.0773 mol
According to the balanced chemical equation, 1 mole of Zn reacts with 2 moles of HCl. Therefore, the number of moles of HCl needed is:
n(HCl) = 2 × n(Zn) = 2 × 0.0773 mol = 0.1546 mol
Now we can use the molarity of the HCl solution to calculate the volume needed:
M(HCl) = 1.50 mol/L
n(HCl) = V(HCl) × M(HCl)
V(HCl) = n(HCl) / M(HCl) = 0.1546 mol / 1.50 mol/L = 0.103 L = 103 mL
Therefore, we need 103 mL of 1.50 M HCl(aq) to react with 5.05 g Zn(s).
how much energy can metals hold?
do different types of metals hold different types of energy?
how to you measure how much energy something has?
Metals do not hold energy because they can conduct or store energy in various forms, means the electrical or kinetic energy. Different metals have different conductivity and storage capacity for different forms of energy.
What is electric enery?Electric energy is a form of energy that results from the flow of electric charge through a conductor. It is used to power many devices and systems, from home appliances to industrial machinery.
Electric energy is measured in units of joules or kilowatt-hours.This is the example of electric energy.
What is kinetic energy?Kinetic energy is an object possesses due to its motion. It is dependent on the mass and velocity of the object and is expressed as 1/2 mv^2, where m is the mass of the object and v is its velocity. Kinetic energy is a scalar quantity and is measured in joules.This is the fine example of kinetic energy.
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Metals can hold different amounts of energy depending on the specific metal and the form of energy like thermal energy, electrical energy and mechanical energy.
Explain the different form of energy.1. Thermal energy: Metals are good conductors of heat, so they can absorb and hold a significant amount of thermal energy. The specific amount of thermal energy that a metal can hold depends on factors such as its specific heat capacity and mass.
2. Electrical energy: Metals are also good conductors of electricity, so they can hold and transport electrical energy. The amount of electrical energy that a metal can hold depends on factors such as its conductivity and the amount of current flowing through it.
3. Mechanical energy: Metals can also store mechanical energy in the form of elastic or plastic deformation. The amount of mechanical that a metal can hold depends on factors such as its elasticity and strength.
What is conductors?In the context of electricity and physics, a conductor is a material or substance that allows the flow of electrical current or heat through it. Conductors are typically materials with low electrical resistance or high thermal conductivity, or both.
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How many mL of a 0.25M Pb(NO3), solution are needed to react with 0.40L of a 0.10M NaCI solution in the following reaction?
2 NaCI + Pb(NO3)2 - 2 NaN03 + PbCI2
80 mL of 0.25 M Pb(NO₃)₂ solution are needed to react with 0.40 L of 0.10 M NaCl solution according to the given reaction.
What are double displacement reactions?Double displacement reactions, also known as double replacement reactions or metathesis reactions, are chemical reactions in which two ionic compounds react with each other and exchange ions to form two new compounds.
First, we need to determine the limiting reagent in the reaction between NaCl and Pb(NO₃)₂ . The balanced equation shows that the mole ratio of NaCl to Pb(NO₃)₂ is 2:1, so we can calculate the number of moles of each reactant:
moles NaCl = 0.10 M x 0.40 L = 0.04 moles
moles Pb(NO₃)₂ = 0.25 M x V
where V is the volume of Pb(NO₃)₂ solution needed in litres.
To react completely with the NaCl, we need 2 moles of Pb(NO₃)₂ for every 1 mole of NaCl. So, we can set up an equation to solve for V:
0.04 moles NaCl / 2 x (1 molePb(NO₃)₂ / 1 mole NaCl) = 0.25 M x V
Simplifying, we get:
V = (0.04 / 2) / 0.25 = 0.08 L = 80 mL
Therefore, 80 mL of 0.25 M Pb(NO₃)₂ solution are needed to react with 0.40 L of 0.10 M NaCl solution
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When 25 mL of 1.0M H₂SO4 is added to 50 mL of 1.0 M NaOH at 25°C in a calorimeter,
the temperature of the aqueous solution increases to 33.9 °C. Assuming that the specific
heat of the solution is 4.18 J/g°C, that its density is 1.00/mL, and that the calorimeter
itself absorbs a negligible amount of heat, calculate the amount of heat absorbed for the
reaction.
Answer: The amount of heat absorbed for the reaction of 25 mL of 1.0 M H₂SO4 and 50 mL of 1.0 M NaOH, resulting in a temperature increase from 25°C to 33.9°C, is 10.14 kJ.
Explanation:
The pressure of compressed air that occupies 2 L is 30.0 atm. What will be the new volume of the gas if the pressure is reduced to 10.0 atm if the temperature is not allowed to change? Ty in advance!
Answer:
To solve this problem, we can use the Boyle's Law equation, which states that the pressure and volume of a gas are inversely proportional at constant temperature.
Boyle's Law: P1V1 = P2V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the new pressure and volume.
Using the given values:
P1 = 30.0 atm
V1 = 2 L
P2 = 10.0 atm
Substituting these values into the Boyle's Law equation, we get:
30.0 atm x 2 L = 10.0 atm x V2
Simplifying and solving for V2, we get:
V2 = (30.0 atm x 2 L) / 10.0 atm
V2 = 6 L
Therefore, the new volume of the gas will be 6 L if the pressure is reduced to 10.0 atm, assuming the temperature remains constant.
I Hope This Helps!
Which orbital diagram represents helium (atomic number = 2)?
Helium is depicted in orbital diagram A. (atomic number 2). It has one s orbital with two electrons in it.
What orbitals of the atom fill after the 1s and 2s?The first to be filled will have a maximum of two electrons. The maximum of two electrons will then be placed in position 2s. The maximum number of six electrons will then be transferred to 2p.
How many electrons can fit into a 2s orbital?A maximum of two electrons with the opposite spin can fit in any orbital. One 1s orbital and two electrons are contained within the first shell. 8 electrons are located in the second shell, with 2 in a 2s orbital and 6 in three 2p orbitals. There are 18 electrons in the third shell, with 2 in the 3s orbital and 6 in the three 3p orbitals.
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Pls help and tell me explanation of answer
Answer: click thanks if you like my answer , have a good day !
According to the Ideal Gas Law, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.
If the number of moles and the temperature are doubled while the pressure remains constant, we can write:
(P)(2V) = (2n)(2R)(T)
Simplifying this equation, we get:
2PV = 4nRT
Dividing both sides by 2, we get:
PV = 2nRT
This equation shows that the new volume is directly proportional to the number of moles and temperature.
If we assume that the initial number of moles and temperature are 1 and T, respectively, and the initial volume is 3.0 L, then the new volume can be calculated as:
V' = (2n)(2R)(2T)/(P)
V' = 8(1)(0.0821)(2T)/P
V' = 1.65T/P
Therefore, the new volume is directly proportional to the temperature and inversely proportional to the pressure. Since the pressure remains constant, the new volume will be directly proportional to the temperature, which is doubled in this case.
Thus, the new volume will be double the original volume, and the correct answer is D: "The new volume is double the original volume."
Explanation:
hope its help <:
In a heat engine, 700 J of heat enters the system, and the piston does 400 J of work.
What is the final internal (thermal) energy of the system if the initial energy is 1200 J?
Responses
300 J
300 J
900 J
900 J
1100 J
1100 J,
1500 J
Answer:
2300J
Explanation:
The first law of thermodynamics states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system:
ΔU = Q - W
Where ΔU is the change in internal energy, Q is the heat added to the system, and W is the work done by the system.
In this case, ΔU is what we want to find, Q is 700 J, and W is -400 J (note that the work done by the system is negative because it is done on the surroundings). Substituting these values into the equation:
ΔU = Q - W
ΔU = 700 J - (-400 J)
ΔU = 700 J + 400 J
ΔU = 1100 J
The final internal energy of the system is therefore 1100 J + the initial energy of 1200 J, which equals 2300 J.
Could you complete this? Thanks
The complete balanced equations with the stoichiometric coefficients are:
10) 16Al + 3S₈ → 8Al₂S₃
11) 6 Cs + N₂ → 2Cs₃N
12) Mg + Cl₂ → MgCl₂
What is stoichiometric coefficient?The quantity of molecules involved in the reaction is known as the stoichiometric coefficient or stoichiometric number. Any balanced response has an equal number of components on both sides of the equation, as can be seen by looking at it. The number that is present in front of atoms, molecules, or ions is known as the stoichiometric coefficient.
Other reactions:13)10Rb + 2RbNO₃ → 6Rb₂O + N₂
14) 2C₆H₆ + 15O₂ → 6H₂O + 12CO₂
15) N₂ + 3H₂ → 2NH₃
16)Al(OH)₃ + H₂SO₄ → Al₂(SO₄)₃ + H₂O
17) 2Na + Cl₂ → 2NaCl
18) 16Rb + S₈ → 8Rb₂S
19) 2H₃PO₄ + 3Ca(OH)₂ → Ca₃(PO₄)₂ + 6H₂O
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What type of spectrum does this represent?
A. Absorption Spectrum
B. Continuous Spectrum
C. Emission Spectrum
Answer:
Continuous Spectrum, a spectrum that contains all wavelengths of light within a specific range, with no gaps or lines. It is produced by a hot, dense object such as a star or a light bulb.
Emission Spectrum, a spectrum that contains bright lines or bands of specific wavelengths, with dark spaces in between. It is produced when light is emitted from a hot gas or plasma, and the specific wavelengths of the lines or bands depend on the elements present in the gas.
Absorption Spectrum, a spectrum that contains dark lines or bands of specific wavelengths, with bright spaces in between. It is produced when a continuous spectrum passes through a cool gas, and the specific wavelengths of the lines or bands depend on the elements present in the gas.
A student used a balance and a graduated cylinder to collect the data 10.23,20.0, and 21.5 calclulate the density of the elements
Assuming that the student measured the mass of the elements using a balance and the volume using a graduated cylinder, we can use the following formula to calculate the density:
Density = mass / volume
Let's say the masses of the elements were 10.23 grams, 20.0 grams, and 21.5 grams, and the volumes were 10 mL, 20 mL, and 25 mL respectively.
Then, the densities would be:
Density of element 1 = 10.23 g / 10 mL = 1.023 g/mL
Density of element 2 = 20.0 g / 20 mL = 1.0 g/mL
Density of element 3 = 21.5 g / 25 mL = 0.86 g/mL
What is density?
Density is a physical property of matter that describes how much mass is contained in a given volume of a substance. It is defined as the amount of mass per unit volume, and is typically measured in grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).
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A solution containing 0.13 M, each of I−, Br−, CO2−3, and C2O2−4 is titrated by a solution containing Pb2+. Place the anions in the order in which they will precipitate.
The order in which the ions would be precipitated is; Carbonate > Bromide > Iodide > Oxalate
What is the precipitation of ions?Precipitation of ions refers to the process by which two aqueous solutions containing dissolved ionic compounds are mixed, resulting in the formation of an insoluble ionic compound that falls out of solution as a solid precipitate.
This occurs when the cations and anions of the two compounds combine to form an insoluble compound, which is not soluble in water and falls out of solution as a solid. The precipitation of ions is commonly used in chemistry to isolate, identify, or quantify different types of ions in a solution.
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The variation of free energy of formation, ΔGf°, of N2, at 25 °C and 1 bar
Answer:
The standard free energy of formation, ΔGf°, of N2 at 25 °C and 1 bar is -16.5 kJ/mol. This means that when one mole of N2 is formed from its constituent elements (N2 in the gas phase at 1 bar and 25 °C), there is a release of 16.5 kJ of free energy. The negative sign indicates that the reaction is exothermic, meaning that it releases heat.
The standard enthalpy of formation of all elements in their standard states are assumed to be zero. The standard free energy of formation, ΔGf°, of N₂ at 25 °C and 1 bar is -16.5 kJ/mol.
The standard enthalpy of formation of a compound is defined as the enthalpy change accompanying the formation of one mole of the compound from its constituent elements.
When one mole of N₂ is formed from its constituent elements (N₂ in the gas phase at 1 bar and 25 °C), there is a release of 16.5 kJ of free energy.
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What type of intermolecular force will for between H2O AND CH3OH? Draw and label a picture of this bond. Explain in words how this bond forms.
Hydrogen bonding, which is unquestionably what we have, will occur from the intermolecular force between the molecules of H2O and CH3OH. Atoms trade or exchange valence electrons to create bonds.
How come we create bonds?Trust and self-esteem are developed in children and adolescents through strong emotional ties. After that, they can leave the family and establish wholesome friendships and other types of social ties. Healthy relationships consequently lower a child's chances of emotional discomfort or antisocial behaviour.
What exactly is a bonds, for example?The government of a country issues government bonds, a sort of fixed-interest bond. These bonds are thought of as low-risk investments. Examples of different kinds of government bonds include T - bills, Municipality Bond, Zero-Coupon Bonds, and others.
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Calculate the molarity of 36.5 g of NaOH in 360 mL of an NaOH solution
Answer: 2.536 M
Explanation: To calculate the molarity of NaOH in the solution, we need to first calculate the number of moles of NaOH present in the solution.
The formula for calculating the number of moles is:
moles = mass / molar mass
The molar mass of NaOH is 40 g/mol (23 g/mol for Na + 16 g/mol for O + 1 g/mol for H). Therefore, the number of moles of NaOH present in the solution is:
moles of NaOH = 36.5 g / 40 g/mol = 0.9125 mol
The volume of the solution is 360 mL, which is equivalent to 0.360 L. Therefore, the molarity of the NaOH solution is:
Molarity = moles / volume = 0.9125 mol / 0.360 L = 2.536 M
Therefore, the molarity of the NaOH solution is 2.536 M.
Calculate the energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n = 3 to n = 1.
The energy of a photon emitted when an electron in a hydrogen atom transitions from the third to the first energy state can be calculated using the Rydberg formula. For the given transition, the energy equates to approximately 1.63 x 10^-18 Joules.
Explanation:In quantum physics, the energy of a photon emitted when an electron moves from one energy level to another in a hydrogen atom can be calculated using the Rydberg formula. The formula is E = R_H *(1/ni^2 - 1/nf^2), where R_H is the Rydberg constant for hydrogen (approximately 2.18 x 10^-18 Joules), ni is the initial energy level (3 in this case), and nf is the final energy level (1 in this case).
Plugging these into the equation, we get E = 2.18 x 10^-18 Joules *(1/3^2 - 1/1^2). Then, we find that the energy of the photon is about 1.63 x 10^-18 Joules. This energy corresponds to the energy difference between the two energy levels.
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The energy of a photon emitted when an electron in a hydrogen atom undergoes a transition from n=3 to n=1 can be calculated using the Rydberg formula for hydrogen and the formula for the energy of a photon.
Explanation:The energy of a photon emitted during an electron transition in a hydrogen atom can be calculated using the formula for the energy of a photon: E = hf, where 'E' is energy, 'h' is Planck's constant, and 'f' is frequency. Moreover, when an electron in a hydrogen atom undergoes a transition from n=3 to n=1, the energy difference between these two energy levels can be calculated using the Rydberg formula for hydrogen: ΔE = RH (1/n1² - 1/n2²), where 'RH' is the Rydberg constant for hydrogen, 'n1' and 'n2' are the initial and final energy levels respectively. By substituting the values, we get ΔE = RH (1/1² - 1/3²). So, this is the energy of the emitted photon when an electron undergoes a transition from n=3 to n=1.
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**If you have 5.0 moles of calcium, how many moles of calcium carbonate will be produced?
5.0 moles of calcium will produce 5.0 moles of calcium carbonate.
The equation for the reaction of calcium and carbon dioxide is:Ca + CO2 → CaCO3
Therefore, for every 1 mole of calcium, 1 mole of calcium carbonate will be produced.
Given: 5.0 moles of calcium
Therefore, 5.0 moles of calcium carbonate will be produced.
The reaction of calcium and carbon dioxide produces calcium carbonate. For every 1 mole of calcium, 1 mole of calcium carbonate will be produced. In this case, 5.0 moles of calcium will result in the production of 5.0 moles of calcium carbonate.
This reaction is used in a variety of applications, such as the production of cement, lime, and mortar. Calcium carbonate is also used in the production of medicines and supplements, as well as in the food industry to increase calcium levels in foods. Calcium carbonate is also used in water treatment to remove heavy metals and other contaminants. In conclusion, 5.0 moles of calcium will produce 5.0 moles of calcium carbonate.
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discribe the difference bettween a food chain and a food web
1.4gm of mixture of CaCO3, and MgCO3 was dissolved in 200 ml of 0.2N Hcl. After the completion of reaction, the resulting solution was diluted to 250ml and 10ml of this solution required 12 ml of N/30 NaOH for neutralization calculate percentage composition of this mixture
Answer: 0.893 g / 84.31
Explanation: Let's first calculate the number of moles of HCl that reacted with the mixture:
moles of HCl = 0.2 N x 0.2 L = 0.04 moles
The balanced chemical equation for the reaction between HCl and CaCO3 is:
CaCO3 + 2HCl → CaCl2 + CO2 + H2O
The balanced chemical equation for the reaction between HCl and MgCO3 is:
MgCO3 + 2HCl → MgCl2 + CO2 + H2O
We can use the number of moles of HCl and the stoichiometry of these reactions to calculate the total number of moles of CaCO3 and MgCO3 in the mixture:
moles of CaCO3 + moles of MgCO3 = 0.04 moles
Let x be the mass of CaCO3 and y be the mass of MgCO3 in the mixture. Then we can write:
x + y = 1.4 g (total mass of mixture)
x/100.09 + y/84.31 = 0.04 (total moles of mixture)
Solving these equations, we get:
x = 0.507 g (approx.)
y = 0.893 g (approx.)
Therefore, the mixture contains approximately 36.2% CaCO3 and 63.8% MgCO3 by mass.
Now, let's calculate the number of moles of NaOH required to neutralize 10 mL of the diluted solution:
moles of NaOH = (12 mL)(1/30 N)(1/1000 L/mL) = 0.0004 moles
The balanced chemical equation for the neutralization reaction between NaOH and HCl is:
NaOH + HCl → NaCl + H2O
We can use the number of moles of NaOH and the stoichiometry of this reaction to calculate the number of moles of HCl that remained in the diluted solution:
moles of HCl remaining = moles of NaOH = 0.0004 moles
The diluted solution has a volume of 250 mL, so its concentration of HCl is:
[HCl] = moles of HCl remaining / volume of solution = 0.0004 moles / 0.250 L = 0.0016 N
The 10 mL of diluted solution used for titration was taken from the original solution that was prepared by dissolving the mixture in 200 mL of 0.2 N HCl. Therefore, the concentration of HCl in the original solution is:
[HCl] = (0.2 N)(200 mL / 250 mL) = 0.16 N
Since the number of moles of HCl in the original solution is equal to the number of moles of HCl that reacted with the mixture, we can calculate the number of moles of the mixture:
moles of mixture = moles of HCl reacted = 0.04 moles
The mass of the mixture is 1.4 g, so its molar mass is:
molar mass of mixture = 1.4 g / 0.04 moles = 35 g/mol
The mass of CaCO3 in the mixture is 0.507 g, so its number of moles is:
moles of CaCO3 = 0.507 g / 100.09 g/mol = 0.005067 moles
The mass of MgCO3 in the mixture is 0.893 g, so its number of moles is:
moles of MgCO3 = 0.893 g / 84.31
Which detail from the passage could be used to support the idea that people need to conserve mineral resources?
A.
Mineral resources have done a lot
B.
the resources are steadily and forever diminishing
C.
It is only by having cheap and abundant coal, iron, and copper
D.
But until new inventions have actually been made
The detail from the passage that could be used to support the idea that people need to conserve mineral resources is: B. "the resources are steadily and forever diminishing."
This detail indicates that mineral resources are finite and will eventually be depleted if they are not conserved. It implies the need for people to use mineral resources more efficiently and find ways to conserve them for future generations.
What is mineral?
A mineral is a naturally occurring inorganic solid substance with a specific chemical composition and a crystalline structure. Minerals are formed through geological processes and are typically found in rocks, ores, and mineral deposits in the earth's crust. They have a wide range of physical and chemical properties and can be identified by their characteristic properties. Examples of common minerals include quartz, feldspar, calcite, and mica.
What is diminishing?
Diminishing refers to the process of becoming smaller, weaker, or less in quantity or importance. It is a gradual decrease in size, quantity, or intensity over time. For example, the diminishing population of a species indicates that the number of individuals in the population is decreasing over time, whereas diminishing natural resources indicate that the amount of those resources is gradually decreasing due to depletion.
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Explain how you recreated Lee's results.
To recreate experimental results, follow the same procedure as the original researcher and use the same materials, equipment, and statistical methods. Replicate experimental conditions and repeat the experiment multiple times to ensure consistency.
What are an experimental conditions?
Experimental conditions refer to the set of factors or variables that are intentionally manipulated or controlled during an experiment to observe their effect on the outcome or dependent variable. These conditions can include environmental factors such as temperature, humidity, and lighting, as well as other experimental parameters such as sample size, treatment duration, and measurement techniques.
What is an equipment?
In scientific experiments, equipment refers to the various tools and instruments used to measure, observe, manipulate, or analyze materials and phenomena under investigation. Examples of scientific equipment include microscopes, spectrometers, centrifuges, balances, pipettes, and thermometers.
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Can someone help me do a CER 8-10 sentences
Yes, shining light on metal can cause it to get warm, regardless of the type of light used. When light strikes surface, some of its energy is absorbed by material, which causes atoms to vibrate, leading to increase in material's temperature and this effect is known as thermal radiation.
Does it matter what type of light shines on the meta?The amount of heat generated depends on several factors, including the intensity of light, duration of exposure, and material's properties, such as its reflectivity, emissivity and specific heat capacity.
I case of the metal used to make satellites, it absorbs infrared light, which means that it will be heated up if exposed to this type of light. However, metal transmits X-ray light and reflects visible light, so it will not be heated by these types of light.
Therefore, it is essential to consider type of light used when assessing heat generated by material. Different materials have different spectral responses to light, which means that they will absorb, reflect or transmit different types of light, and as a result, they will behave differently when exposed to light.
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Which of the following is already in its empirical formula?
-C22H34O10
-C6H6
-C6H1203
-C5H1202
-none of these
These substances C6H1203 don't already exist in their empirical formula.
How can the empirical formula in MCQS be found?The empirical formula is CH for both C2H2 and C2H6, as it represents the simplest whole number ratio of the various atoms in a molecule. The compound's molar mass is 314 g/mol, and the empirical formula mass is (2 X 12) + 1 + 80 = 105g. Hence, C6H3Br3 is the molecular formula.
What are C6H12O6 and C6H6's empirical formulas?Glucose has the chemical formula C6H12O6 = 6 x CH2O c.The molecular weight of glucose is 180 g/mol.. The empirical and molecular formulas are identical because it equals 6 x 30 g/mol.
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1. What is the use of the following reagents in the various organic reactions?
a. Carbon tetra chloride in the preparation of alkynes (
Carbon tetrachloride (CCl4) is commonly used as solvent in the preparation of alkynes.
What is Carbon tetrachloride (CCl4)?CCl4 is a colorless, heavy, nonflammable liquid that was once widely used as a solvent and fire extinguisher.
It has a tetrahedral molecular geometry and is composed of one carbon atom and four chlorine atoms, which are covalently bonded.
However, due to its toxic and environmentally hazardous properties, carbon tetrachloride is no longer widely used in many applications.
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NEED HELP ASAP PLS AND THX PIC IS ATTACHED
1) Protons: 4
Neurons: 5
Electrons: 4
2) atomic number: 4
3) isotope
4) Mass: 9.012
Complete the w expression for the autoionization of water at 25 °C.
w=1.00×10^−14=
When limestone (which is principally CaCO3) is heated, carbon dioxide and quicklime (CaO) are produced by the reaction CaCO3(s) →∆ CaO(s) + CO2(g) . If 16.3 g of CO2 was produced from the ther- mal decomposition of 41.48 g of CaCO3, what is the percentage yield of the reaction?
Consider the neutralization reaction:
2 HNO3(aq) + Ba(OH)₂ (aq) → 2H₂O(1) + Ba(NO3)₂(aq)
A 0.120 L sample of an unknown HNO3 solution required 37.9 mL of 0.250 M Ba(OH), for complete neutralization. What is
the concentration of the HNO3 solution?
Explanation:
First, we need to write a balanced chemical equation for the neutralization reaction:
2 HNO3(aq) + Ba(OH)2(aq) → 2 H2O(l) + Ba(NO3)2(aq)
From the balanced equation, we can see that the stoichiometric ratio of HNO3 to Ba(OH)2 is 2:1. This means that 2 moles of HNO3 react with 1 mole of Ba(OH)2.
Using the given information, we can calculate the number of moles of Ba(OH)2 that reacted:
moles of Ba(OH)2 = Molarity x Volume (in L)
moles of Ba(OH)2 = 0.250 M x (37.9/1000) L
moles of Ba(OH)2 = 0.009475 mol
Since the stoichiometric ratio of HNO3 to Ba(OH)2 is 2:1, the number of moles of HNO3 that reacted is twice the number of moles of Ba(OH)2:
moles of HNO3 = 2 x moles of Ba(OH)2
moles of HNO3 = 2 x 0.009475 mol
moles of HNO3 = 0.01895 mol
Finally, we can calculate the concentration of the HNO3 solution:
concentration of HNO3 = moles of HNO3 / volume of HNO3 solution (in L)
concentration of HNO3 = 0.01895 mol / 0.120 L
concentration of HNO3 = 0.158 mol/L
Therefore, the concentration of the HNO3 solution is 0.158 mol/L.
If percentage tield is equal to 100%
Answer:
If the percent yield is 100%, the actual yield will be equal to the theoretical yield.
Imagine that humans achieve interstellar travel and are able to move from solar system to
solar system. What would change about the stars for these space travelers?
A: absolute magnitude
B:apparent magnitude
C:absorption spectrum
D:relative electromagnetism
Absolute magnitude, on the other hand, is a measure of how bright a star would appear if it were located at a standard distance of 10 parsecs (32.6 light-years) away from Earth.
What is Magnitude?
Magnitude is a measure of the brightness of a celestial object, such as a star, planet, or galaxy. It is based on the amount of light that is emitted by the object and is typically expressed using a numerical scale. The lower the magnitude value, the brighter the object appears.
Apparent magnitude is a measure of how bright an object appears to an observer on Earth, while absolute magnitude is a measure of how bright an object would appear if it were located at a standard distance of 10 parsecs (32.6 light-years) away from Earth.
Apparent magnitude is a measure of how bright a star appears to an observer on Earth. It is determined by the amount of light that reaches Earth from the star, as well as the distance between the star and Earth. As humans travel away from our solar system and to other solar systems, the distance between them and the stars will change, which will affect how bright the stars appear to the travelers. As they move closer to a star, its apparent magnitude will increase, and as they move away, its apparent magnitude will decrease.
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I don’t get this at allll
The volume of the nitrogen oxide gas is 35.2 L
How do you apply stoichiometry?Stoichiometry is the quantitative study of reactants and products in a chemical reaction. It is used to determine the amount of reactants needed to produce a certain amount of product, or to determine the amount of product that will be produced from a given amount of reactant.
To apply stoichiometry;
We know that;
Number of moles of Cu = 150/ 63.5g/mol = 2.36 moles
If 3 moles of Cu produced 2 moles of NO
2.36 moles of Cu will produce 2.36 * 2/3
= 1.57 moles
If 1 moles of NO occupies 22.4 L
1.57 moles of NO will occupy 1.57 * 22.4/1
= 35.2 L
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