When Newton started studying gravity, the concept of gravity was already in place.
A. True
B. False
Help please!!!!!!!!!!!!!!!!!!!!…
Answer:
i honestly dont know how this is showing up on my thing i am 13
Explanation:
sorry i dont know at all
How many grams of solute are needed to order to prepare 100.00 mL of a 0.1000 M solution of a compound with a molecular weight of 350.0 g/mol
Answer:
i got 35 but i am as lost as you are so don't really take my answer as a trusted answer
The grams of solute are required.
The mass of solute is 3.5 g
c = Molarity = 0.1 M
M = Molar mass = 350 g/mol
V = Volume of solution = 100 mL = 0.1 L
n = Number of moles
m = Mass of solute
Molarity is given by
[tex]c=\dfrac{n}{V}\\\Rightarrow n=cV\\\Rightarrow n=0.1\times 0.1\\\Rightarrow n=0.01\ \text{moles}[/tex]
Molar mass is given by
[tex]M=\dfrac{m}{n}\\\Rightarrow m=Mn\\\Rightarrow m=350\times 0.01\\\Rightarrow m=3.5\ \text{g}[/tex]
The mass of solute is 3.5 g
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What were the first 5 planets that were observed? Why were those the only ones? Help pls!
Will this reaction occur?
Ca+AlCl3 —>
A.Yes
B.No
Answer:
A.Yes
Explanation:
What is obesity and hemoglobin?
Answer:
obesity means having too much fat
hemoglobin is a protein in red blood cells .
for example if your hemoglobin is low you are anemic.
obesity if you are overweight your health is at risk because of excess fat.
Help this is so confusing like
Answer: which of the following is qualitative?
A. 100-calorie apple
B. 1-liter soda
C. triangular crystal
D. 10-inch brick
answer is D
Explanation:
Which has more molecules?
A. 1 mole H2O
B. 1 mole Al(OH)3
C. 1 mole NaCl
D. There are all the same
Explanation:
1 mole H2OI hope it's helpful for you
1 mole of H₂O has more molecules than other compounds. The correct option is A.
What are molecules?
A molecule is a collection of two or more atoms held together by attractive forces known as chemical bonds.
The International System of Units uses the mole as the unit of material quantity. How many elementary entities of a specific substance are present in an object or sample is determined by its quantity.
The tiniest component of any substance is capable of existing independently while maintaining its chemical and physical properties and is composed of one or more elements.
Out of these molecules, water has more molecules than 1 mole Al(OH)₃ and 1 mole NaCl. They don't have the same number of moles.
Therefore, the correct option is A. 1 mole H₂O.
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What was the effect of decreasing the copper's mass?
Answer:
Decreasing the temperature of the copper made the final temperature decrease.
Heat emitted by copper reduces as copper's mass decreases. As the mass of copper lowers due to a decrease in heat gain by water, the final temperature also drops.
What is heat?The transfer of kinetic energy from an energy source to a medium, an object, or from one to the other is referred to as the creation of heat. The sun is the source of all energies. It is the natural source of solar energy, heat, and light. Thermal energy can move through three different channels: conduction, convection, and radiation.
Therefore, the increase in temperature is always proportionate to the mass of water. Thus, the final temperature will be lower if we increase the water mass. The temperature will be lower in the end. The density reduces as volume grows. Consequently, density drops as temperature rises.
Thus, heat emitted by copper reduces as copper's mass decreases. As the mass of copper lowers due to a decrease in heat gain by water, the final temperature also drops.
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Magnesium (24.30) reacts with hydrogen chloride (X g) to produce hydrogen gas (2.04 g) and magnesium chloride (96.90 g). How much hydrogen chloride was used in the reaction?
Round your answer to the second decimal.
Answer:
Hydrogen Chloride is 74.64 grams.
Explanation:
Using the given information, we can find the amount of grams of hydrogen chloride that take place in the reaction.
24.30 grams of Magnesium"x" grams of Hydrogen chloride2.04 grams hydrogen gas96.90 grams of magnesium chloride.Due to the Law of Conservation of Mass, the mass of the system must remain constant. To find the value of x, make the equation below.
[tex]24.30 + x=2.04 + 96.90[/tex]
The left side represent the reactant side of the chemical reaction and the right side represents the product side.
[tex]2.04 + 96.90= 98.94[/tex]
[tex]24.30+x=98.94[/tex]
[tex]24.30 - 24.30 + x= 98.94 - 24.30[/tex]
[tex]x=74.64[/tex]
What increases the concentration of H+ in water ?
Answer:
Acid
Explanation:
What results when oxygen reaches a burning splint?
Answer:
Hydrogen (H2) When a burning splint is introduced to a sample of pure hydrogen gas, it will burn with a popping sound. Oxygen (O2) When a smoldering splint is introduced to a sample of pure oxygen gas, the splint will reignite.
Answer:
The burning splinter makes hydrogen and oxygen react and you hear a pop sound.
Explanation:
given the molecular clocks shown, you can conclude that reptiles and mammals should have approximately ______ amino acid differences between them in cytochrome c.
Answer:
The answer to your question is 15
why are metals generally good conductors of electric current?
Answer:
(Hope this helps can I pls have brainlist (crown)☺️)
Explanation:
Because the atoms in metals form a matrix through which outside electrons may easily travel, metals are good conductors of electricity and heat. They generate a sea of electrons around the positive nuclei of the interacting metal ions, rather than circling their particular atoms.
The free flow of shared electrons can carry an electric current through a metal. Carbon atoms join with iron atoms to create bonds.
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An ice rink has the least amount of friction.
Any smooth surface has the least amount of friction.I hope this helped at all.
Which surface has the least amount of friction?
An ice rink
A grassy field
A paved road
A sidewalk
Answer:
An Ice rinkwhich element is in period 2 and group 6
When electricity runs through an electric stove, what other type of energy is produced?
A.
heat energy
B.
sound energy
C.
chemical energy
D.
mechanical energy
Question 1 (5 points)
(04.01 LC)
Based on the law of conservation of mass, which of the following statements is correct? (5 points)
a
Matter is neither created nor destroyed.
b
Matter can be created but it cannot be destroyed.
The total mass of substances before a reaction is less than the total mass after a reaction.
The total mass of substances before a reaction is greater than the total mass after a reaction.
Matter is neither created nor destroyed. Therefor, option (A) is correct.
What is The Law of Conservation of Mass?The Law of Conservation of Mass is a fundamental principle in science that states that matter cannot be created or destroyed in a chemical reaction, only transformed from one form to another. This means that the total mass of the reactants in a chemical reaction must be equal to the total mass of the products.
The Law of Conservation of Mass was first introduced by Antoine Lavoisier, a French chemist, in the 18th century. The law has been extensively tested and verified through numerous experiments in the field of chemistry. It is an essential concept for understanding the behavior of matter in chemical reactions and for the development of technologies that depend on chemical reactions, such as energy production, medicine, and materials science.
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as heat is added to melt ice. Does the temperature change?
Answer:
Depending on the deformity it will depend on the amount of the ice that is melted,it the majority is melted that is relevant to the heated liquid melting the ice,so yes only the water formalities of the melted ice.
Compound Y dissolves in ethanol but not water what type of bond is Y ?
Covalent Bond.
Explanation: Covalent compound are soluble in organic solvents (non polar) but insoluble in water (polar).
Ethanol being both polar and non polar can dissolve covalent compound.
Which of the following is NOT an example of a communicable disease.
The none communicable disease in the given option is diabetes
What is a communicable disease?A communicable disease is a type of disease that can be spread from one person to another.
Examples of communicable diseases include;
HIV, Hepatitis (A, B, C) Measles, TuberculosisInfluenzaCommon coldThus, the none communicable disease in the given option is diabetes.
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Classify each of the following as abiotic or biotic.
A. Sand
B. Grass
C. Air
D. Rabbits and deer
E. Humans
Answer:
D.Explanation:
#I'm not sure#happy learningThe organelle that move proteins and other substances through the cell is the
Answer:
Endoplasmic reticulum
Explanation:
What are all the chemical reaction takes place if Conc HNO3 acids leaks in seawater and at what dilution ratio it gets neutralized?
Answer:
Chemical formula: HNO₃
Melting point: −42 °C (−44 °F; 231 K)
Molar mass: 63.012 g·mol−1
Solubility in water: Miscible
Explanation:
When Conc HNO3 acid leaks into seawater presumed to be largely consisting of Sodium Chloride and other dissolved salts, I won't consider it as a chemical reaction rather it is a Physical Change. I presume this activity as a mixture when the acid been the solute becomes a contaminants
A sample of H2 gas (12.28 g) occupies 100.0 L at 400.0 K and 2.00 atm. A sample weighing 9.49 g occupies ________ L at 353 K and 2.00 atm.
Considering the ideal gas law, a sample weighing 9.49 g occupies 68.67 L at 353 K and 2.00 atm.
Ideal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P× V = n× R× T
In this case, you know:
P= 2 atmV= ?n= [tex]9.49 gramsx\frac{1 mole}{2 grams} = 4.745moles[/tex] being 2g/mole the molar mass of H2, that is, the amount of mass that a substance contains in one mole.R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 353 KReplacing:
2 atm× V = 4.745 moles× 0.082[tex]\frac{atmL}{molK}[/tex]× 353 K
Solving:
V = (4.745 moles× 0.082[tex]\frac{atmL}{molK}[/tex]× 353 K)÷ 2 atm
V= 68.67 L
Finally, a sample weighing 9.49 g occupies 68.67 L at 353 K and 2.00 atm.
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https://brainly.com/question/4147359?referrer=searchResultswhich ionization process requires the most energy?
Answer:
the second ionization energy
Explanation:
The second ionization energy is always larger than the first ionization energy, because it requires even more energy to remove an electron from a cation than it is from a neutral atom.
Complete the sentence. When a base is added to water, hydrogen ions __________.
Answer:
Explanation:
Decreases
Answer:
Hydrogen ions decrease. It reduces the concentration of ions.
Explanation:
Cansjhdhsbdhajajajhsbsbshs hahahah she jansbsbsns haha be safe
Answer:
wait what?
Explanation:
brainliest pls
Imagine you are an astronaut and you travel to a planet with a much larger mass than Earth. How would this affect your weight? Explain your answer. (4 points)
Answer:
Explanation:
It may not make any difference. The information missing is the radius of the planet.
However for the purposes of the question, let us assume that it is roughly the same diameter of the earth. Then the weight of anyone would increase if the mass is all that changes..
The formula governing your weight is F = G * m1 *m2 / r^2. If m1 is the mass of the planet and it increases a lot then m2 (you) should increase. The question is done by a proportion.
When reactants are not used to make new substances, are they destroyed?
In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.