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MaRussiya [10]
2 years ago
9

Carbon dioxide is a compound of the elements carbon and oxygen (CO2). What happened to the carbon and oxygen to create this comp

ound?
A. they merged nuclei
B. they swapped protons
C. they combined neutrons
D. they exchanged electrons
Chemistry
1 answer:
dexar [7]2 years ago
6 0

Answer:

D. they exchanged electrons

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which part of the mushroom gathers nutrients from the soil or dead material that the mushroom is decomposing?
OleMash [197]

Answer:

The Mycelium is usually hidden in the soil, in wood, or another food source. A Mycelium may fill a single ant or cover many acres. 

6 0
3 years ago
A sample of oxygen gas (O2) has a volume of 7.51 L at a temperature of 19°C and a pressure of 1.38 atm. Calculate the moles of O
Maslowich

Answer: 0.43molO₂

Explanation:

The ideal gas law for moles is n=\frac{PV}{RT}. If you did not know, R is the ideal gas constant, 0.0821\frac{L*atm}{mol*K}.

Since the temperature must be in Kelvin, we must convert our given temperature from ℃ to K. 19C+273=292K

Now that we have the temperature converted to Kelvin, we can plug in our information to the ideal gas law for the number of moles.

n=\frac{PV}{RT}

n=\frac{1.38atm*7.51L}{0.0821\frac{L*atm}{mol*K} *292K} =0.43molO_{2}

n=0.43molO_{2}

Therefore, the number of moles is 0.43molO₂.

I hope this helps! Pls mark brainliest!! :)

8 0
2 years ago
If I start with two elements in a chemical reaction WHY do I need only those two elements at the end?
Alja [10]

Answer:

um you dont need those 2 elements at the end

8 0
3 years ago
What effect will increased pressure have on 4A (g) + 5B (g) ---> 2C (g) + 7D (g) 
Pie

Answer:

  • <em><u>Option a. no change</u></em>

Explanation:

The question makes sense only if the equation is an equilibrium reaction:

  • <em>4A (g) + 5B (g) ⇄ 2C (g) + 7D (g) </em>

This is, A and B react to produce C and D, forward reaction; and C and D react to form A and B, reverse reaction.

Then, you can study the effect of increased pressure using LeChatelier's principle.

To counteract the disturbing effect produced by increased pressure on the equilibrium, the system will react shifting the toward to the side where the pressure could be decreased.

That would be toward the side that has less gas molecules.

Since both sides have 9 molecules (4 + 5 = 2 + 7 = 9), the equilibrium concetrations will not change.

That is represented by the first choice: no change.

7 0
4 years ago
The name of the compound with the formula ZnBr2 is
Brilliant_brown [7]
Zinc-bromide is its name. Since you have a metal and a non metal you don’t need to use the prefix “di” for the Br.
4 0
3 years ago
Read 2 more answers
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