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Nuetrik [128]
4 years ago
10

Extra Practice... 1) What is the speed of light?

Chemistry
1 answer:
miss Akunina [59]4 years ago
4 0

What is the speed of light?

The speed of light is 299,792,458 meters per second.

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Calculate the volume of a 0.200 M KCl solution containing 5.00 10-2 mol of solute. Enter your answer in the provided box. IL
Paul [167]

Answer:

The volume of a 0.200 M KCl solution containing 5.00 10-2 mol of solute is 0,25 L

Explanation:

Molarity (M) means: moles of solute which are contained in 1 L of solution.  

In this case we have 0,2 moles which are in 1 L, so, as we have 5x10*-2 moles we have to apply a rule of three to find out the volume.

0,2 moles ........... 1 L

5x10*-2 moles ........... x

x= (5x10*-2 moles . 1 L) / 0,2 moles = 0.25L

(we can also say 250 mL)

4 0
3 years ago
What is the mass of 5.2 moles of Fe?
sashaice [31]

Answer:

279.225g

Explanation:

7 0
3 years ago
What happens to oxygen and carbon dioxide in the respiratory system?
lara [203]

Answer:

In the respiratory system, oxygen is breathed in and carbon dioxide ( a green house gas) is breathed out.

8 0
3 years ago
Explain why the quantum number set (3, 2, 3, -½) is not possible for an electron in an atom.
Doss [256]
I think because there is no such quantum shell as -1/2. 
5 0
3 years ago
The reaction A + B → C has a ∆G'° of –20 kJ/mol at 25° C. Starting under standard conditions, one can predict that: A) at equili
Step2247 [10]

Answer:

C) at equilibrium, the concentration of C will be much greater than the concentration of A or B.  

Explanation:

A + B ⇌ C; ΔG° = -20 kJ·mol⁻¹

If ΔG is negative, the reaction is spontaneous and position of equilibrium lies to the right, so the equilibrium concentration of C is much greater than that of A or B.

A) is wrong. The molar ratio of A:B is 1:1. If their initial concentrations are 1 mol·L⁻¹, their final concentrations will be equal.

B) is wrong. The position of equilibrium lies to the right, so the concentration of C will be much greater than that of A.

D) and E) are wrong. ΔG says nothing about the rate of a reaction. It deals with the spontaneity and position of equilibrium not the speed at which equilibrium is achieved.

3 0
3 years ago
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