All categories

3 years ago

#8 please explain if you can thanks

Chemistry

1 answer:

pav-90 [236]3 years ago

6 0

The answer is D because the air is made of nitrogen and oxygen. The reaction is endothermic.
Hope this helps you! :)

You might be interested in

Calculate the mass ratio of S to O in SO, and then calculate the mass ratio of S to O in SO2, given that the mass of S is approx

ziro4ka [17]

Explanation:

From the knowledge of law of multiple proportions,

mass ratio of S to O in SO:

mass of S : mass of O

= 32 : 16

= 32/16

= 2/1

mass ratio of S to O in SO2:

= mass of S : 2 × mass of O

= 32 : 2 × 16

= 32/32

= 1/1

ratio of mass ratio of S to O in SO to mass ratio of S to O in SO2:

= 2/1 ÷ 1/1

= 2

Thus, the S to O mass ratio in SO is twice the S to O mass ratio in SO2.

8 0

3 years ago

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Lana71 [14]

C. Their components can be separated by physical processes.

6 0

3 years ago

Read 2 more answers

The scientific process is most similar to

Molodets [167]

Science does not have anything to say about right and wrong the meaning of life or the extensive or the subjective

8 0

2 years ago

A graph of coal reserves in the United States versus time slopes downward.

Dafna1 [17]

Answer:

increased

Explanation:

I believe to be increased ,because the coal is a natural resource to be used.

i really hope it helps

4 0

3 years ago

Read 2 more answers

1. Mg2+ and Ca2+ are in the same group on the periodic table. In terms of electronic

finlep [7]

Answer:

Se detailed explanation.

Explanation:

Hello,

In this case, since both magnesium and calcium ions are in group IIA, we can review the following similar properties:

- Since both calcium and magnesium are in group IIA they have two valence electrons, it means that the both of them have two electrons at their outer shells.

- They are highly soluble in water when forming ionic bonds with nonmetals such as those belonging to halogens and oxygen's family.

- Calcium has 18 electrons and magnesium 10 which are two less than the total protons (20 and 12 respectively) since the both of them have lost two electrons due their ionized form.

- Their electron configurations are:

$Ca^{20}=1s^2,2s^2,2p^6,3s^3,3p^6,4s^2\\\\Mg^{12}=1s^2,2s^2,2p^6,3s^2$

It means that the both of them are at the $s$ region since it is the last subshell at which their electrons are.

Best regards.

8 0

3 years ago