1. Calculate the grams of solute contained in 450. mL of a 0.075 M solution of CuCl2.
Answer:
4.6 grams CuCl2
Explanation:
Since molarity is a representation of moles per liter, we first want to convert 450. mL to liters:
450. mL * 1 L/1000 mL = 0.450 L
Now, we can use this number and the molarity to figure out the answer:
0.075 M means that for every liter, there is 0.075 moles of CuCl2. Thus, we can multiply the amount of moles per liter by the number of liters of solution.
0.075 moles/1 L * 0.450 L = 0.03375 moles
Then, we need to round this to the appropriate number of significant figures, which gives us:
0.034 moles CuCl2
Next, we can find the grams of CuCl2. To do this, we first need to find the molar mass of CuCl2. The molar mass of Cu is 63.546 g/mol and the molar mass of Cl is 35.453 g/mol, so the molar mass of CuCl2 is as follows:
(1 Cu * 63.546) + (2 Cl * 35.453) = 134.45 g/mol CuCl2
Now, we can multiply the grams per mole by the number of moles of CuCl2 in our solution:
134.45 g/mol * 0.034 moles = 4.5713 grams = 4.6 grams CuCl2, rounded to the appropriate significant figures.
What do you already know about throwing a curveball?
Answer: You have to have good mechanics as well as the curve with velocity and speed.
The MLB Pitchers you see can be an example.
Commentators yelling Nasty Curveball, Strikeout!!
what type of bond is between H2?
Explanation:
covalent bond enjoy your anseer
How does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed?
А. the value of q is negative
B. the value of q is positive
C. the value of q remains constant OD. the value of a decreases
E. the value of q equals zero
Answer:
the value of q is negative
An atom, X, contains 16 protons.
Which statement about Z is correct?Explain why.
A) It cannot form an ion.
B) It contains 6 electrons in the outer shell.
C) It contains 6 neutrons.
D) It had relative atomic mass of 16.
Answer:
B
Explanation: as protons no. = electrons no.= atomic number(Z)
examples of physical properties.
Answer: Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity. We can observe some physical properties, such as density and color, without changing the physical state of the matter observed.
Explanation:
Question 2 (5 points)
(04.01 LC)
Look at the chemical equation:
2H2S + 302 - 2H2O + 2502
How many atoms of hydrogen (H) are present on both sides of the equation? (5 points)
a
2.
Ob
3
Ос
4
Od 6
Answer:
4 atoms
Explanation:
I hope it helps you!
what is the unique characterization of a ph buffer?
please help me with this question as it's really important
Answer:
(i)
A → CH3CH2CH3 ( Propane )
B → CH3CH(Cl)CH3 ( 2-Chloropropane )
C → No product
D→ CH3CH=CH2 ( 2-propene )
E → CH3CH2COOH ( Propanoic acid )
(ii)
Reagent X → Acidified water [ H+ / H2O ]
Reagent Y → Bromine with Carbon tetrachloride [ Br2 / CCl4 ]
Reagent Z → Sodium hydroxide [NaOH]
what is electromagnetisim
Answer:
science of electromagnetic fields
Explanation:
(winks and runs off)
. Identify molecules of elements;
O2, NH3, He
Elements can be made of one atom, like He, or be elemental molecules, such as hydrogen (H2), oxygen (O2), chlorine (Cl2), ozone (O3), and sulfur (S8). Atoms are not drawn to scale. Some elements are monatomic, meaning they are made of a single (mon-) atom (-atomic) in their molecular form...
diagram of paper chromatography from a chemistry textbook
how does the body and brain react when u are developing feelings for someobody?
what do you mean by decimal number system
please give answer
Part C
Next Emmerson pours dark blue–colored water on the soil around the well. The pictures show how his model looked over time. What do you observe?
Answer:
I obseve that the water is turnign a little green in the begining but when the water hit the gravel and dirt it became realy blue
Explanation:
Mark brainliest idc
Answer:
I observe that the water started off by turning green and the higher the water went the more blue it had gotten.
Explanation: lazy answer but if you want an answer here you go:)
Short definition of potential and kinetic energy in a roller coaster ride.
Potential energy is the energy an object has because of where it is in relation to other objects. Kinetic energy is what makes the object move. Many rides use the transfer of potential energy to kinetic energy to move along the track. Hope this helps!
Which piece of information could a person obtain from a contour map?
1.
the mineral composition of a mountain
2.
the elevation of a mountain
3.
the speed of water flow in a river
4.
the amount of water in a river
Answer:
2. The elevation of a mountain.
Explanation:
Contour maps are only used for elevation
Which type of electromagnetic radiation had a lower frequency than infrared radiation
Answer:
Radio waves
Explanation:
Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation. In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Which of the following is/are considered alcohols?
a CH3OH
b CH3CH2OH
C CH3CH2CH2OH
d All of the above
Answer: THE ANSWER IS D
Explanation:
an alcohol is a hydrocarbon chain with an hydroxyl group (OH)
A, B, AND C ARE ALL ALCOHOLS, SO THE ANSWER IS D
how many ounces in a small can of crushed pineapple?
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Crushed Pineapple in 100% Pineapple Juice 8 oz can.Hope it helps!
Brainliest pls!
Follow me! ;)
what does not happen when the temperature is increased ?
What is defined as the amount of water vapor in the air?
Answer:
It is called absolute humidity.
Explanation:
An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 2 ml. The height of the water rose to 7 ml. If the mass of the stone was 25 g, what was its density?
Please help , this is due today!!
Answer:
1. weak acid
2. weak base
3. weak acid
4. neutral
5. acidic
6. weak base
Explanation:
You can use a pH level scale like the one I attached, to determine each solution.
658 mL of 0.250 M HCl solution is mixed with 325 mL of 0.600 M HCl solution. What is the molarity of the resulting solution
The molarity of the resulting solution obtained by mixing 658 mL of 0.250 M HCl solution with 325 mL of 0.600 M HCl solution is 0.366 M
We'll begin by calculating the number of mole of HCl in each solution. This can be obtained as follow:
For solution 1:Volume = 658 mL = 658 / 1000 = 0.658 L
Molarity = 0.250 M
Mole of HCl =?Mole = Molarity x Volume
Mole of HCl = 0.250 × 0.658
Mole of HCl = 0.1645 moleFor solution 2:Volume = 325 mL = 325 / 1000 = 0.325 L
Molarity = 0.6 M
Mole of HCl =?Mole = Molarity x Volume
Mole of HCl = 0.6 × 0.325
Mole of HCl = 0.195 moleNext, we shall determine the total mole of HCl in the final solution. This can be obtained as follow:Mole of HCl in solution 1 = 0.1645 mole
Mole of HCl in solution 2 = 0.195 mole
Total mole = 0.1645 + 0.195
Total mole = 0.3595 moleNext, we shall determine the total volume of the final solution.Volume of solution 1 = 0.658 L
Volume of solution 2 = 0.325 L
Total Volume = 0.658 + 0.325
Total Volume = 0.983 LFinally, we shall determine the molarity of the resulting solution.Total mole = 0.3595 mole
Total Volume = 0.983 L
Molarity =?Molarity = mole / Volume
Molarity = 0.3595 / 0.983
Molarity = 0.366 MTherefore, the molarity of the resulting solution is 0.366 M
Learn more: https://brainly.com/question/25342554
Which among the following is not present in pure sugar ?
[A] Carbon
[B] Hydrogen
[C] Nitrogen
[D] Oxygen
Answer:
Nitrogen
Explanation:
Pure sugar is sucrose C12H22011
how many grams of co are needed to react with fe2o3?
Answer:
419 grams of CO are needed.
Explanation:
HELP ITS TIMED AND IM STUCK ONE THIS QUESTION
Answer:
It's gotta be the third answer
Explanation:
Hope this helpped!
What does displacement reaction tell you about the reactivity of the 2 metals involved?
it tells me that one element is more reactive than the other
Explanation:
using the reactivity series. the element that come above is the most reactive e.g
potassium
sodium
calcium
magnesium....
potassium is more reactive than sodium and the following below
calcium is more reactive than magnesium since it is below it in the reactivity series.
CONCLUSION, reactivity decreases down the reactivity series and increases up the reactivity series. the example i gave is part of the reactivity series of cations but there is also for anions
how many moles of oxygen are in 20 grams of oxygen
Answer:
0.625
Explanation:
If you are referring the O2, first you need to get the relative mass of it. You can see the O's is around 16. but this is O2,you need to multiple it.
16×2=32
We get the equation n=m/M where m is for gram
20/32=0.625mol