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zimovet [89]
2 years ago
8

Which of the following may indicate that a chemical reaction has occurred?

Chemistry
1 answer:
lianna [129]2 years ago
3 0

Answer:

D, all of the above

Explanation:

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16. A sample of nitrogen gas,
Lana71 [14]

find mol of N2 present using gas law equation

PV = nRT

P = pressure = 688/760 = 0.905 atm.

V = 100mL = 0.1L

n = ???

R = 0.082057

T = 565+273 = 838

Substitute:

0.905*0.1 = n*0.082057*838

n = 0.0905 / 68.76

n = 0.00132 mol N2

Molar mass N2 = 28 g/mol

0.00132 mol = 0.00132*28 = 0.037g N2 gas

4 0
3 years ago
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evablogger [386]
The first option is correct. have fun in earth science i love astronomy!! :)
3 0
3 years ago
If the products of a reaction are Co2 and 2H20, what is known about the<br>reactants?​
Svetradugi [14.3K]

Answer:

Reactant : A combustion of hydrocarbon.

Explanation:

It is known that when hydrocarbons are involved in combustion, they produce carbon dioxide and water.

CxHy + (x+y/4)O2 ===> xCO2 + y/2H2O

4 0
3 years ago
One of the most difficult solar energy design problems to solve is:
Sonja [21]
I'm not sure but i would say C.storing the heat energy.
6 0
3 years ago
Read 2 more answers
A proton is a subatomic particle carrying a charge equal to but opposite that of an electron
Pachacha [2.7K]

Answer:

True

Explanation:

A proton has a charge of +1, while an electron has a charge of -1. This is why a neutral atom has the same number of protons as electrons.

Neutrons have no charge, hence their name neutron which is similar to neutral.

8 0
3 years ago
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