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3 years ago

Which of the following is a true statement about atomic nuclei?

Chemistry

1 answer:

Free_Kalibri [48]3 years ago

8 0

Answer: they have a net positive charge

Explanation:

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In a chemical reaction*

Bess [88]

Answer:

1st one is correct

The atom of the reactants unbound , rearrange, and then rebond to form the product

hope it helps

4 0

3 years ago

Eview Questions

otez555 [7]

Answer:

Qualitative: Physical observations (the sky is blue, the water is boiling, etc.)

Quantitative: Numberical observations (density= 1 g/ml, volume= 14 ft^3, etc.)

Explanation:

The way to remember it is quaLitative is qualities of the object. QuaNtitative is quantities of the object.

5 0

3 years ago

After two half-lives, the amount of radioactive substance remaining will be

Elan Coil [88]

Answer:

A 25% of the initial parent nuclei.

Explanation:

One half life, you get 50%, two half lives you get 25% and you just keep dividing by 2 from there. :) Good luck my friend!

4 0

3 years ago

Electrostatic forced hold which of the following together?

stepladder [879]

I think it’s AG i hope I helped

4 0

3 years ago

The elementary reaction 2H2O(g)↽−−⇀2H2(g)+O2(g) proceeds at a certain temperature until the partial pressures of H2O, H2, and O2

jenyasd209 [6]

Answer:

$1.742\times 10^{-5}$ is the value of the equilibrium constant at this temperature.

Explanation:

$2H_2O\rightleftharpoons 2H_2+O_2$

We are given:

Partial pressure of $H_2O=p^o_{H_2O}=0.0750 atm$

Partial pressure of $H_2=p^o_{H_2}=0.00700 atm$

Partial pressure of $O_2=p^o_{O_2}=0.00200 atm$

The expression of $K_p$ for the given chemical equation is:

$K_p=\frac{p^o_{H_2}^2\times p^o_{O_2}}{p^o_{H_2O}^2}$

Putting values in above equation, we get:

$K_p=\frac{(0.00700 atm)^2\times 0.00200 atm}{(0.0750 atm)^2}\\\\K_p=1.742\times 10^{-5}$

$1.742\times 10^{-5}$ is the value of the equilibrium constant at this temperature.

3 0

4 years ago