Answer:
1.
- A) protons and neutrons
- B) electrons
2.
- By changing the number of proton.
Explanation:
Protons and neutrons are located at the center of an atom which is nucleus .
Electrons will orbit around the nucleus .
Observing a phenomenon in the lab includes which of the following?
1 answer:
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Answer: 448 mL of hydrogen gas.
Solution:
Now,according to reaction
1 mole of magnesium produces one mole of hydrogen gas.
Then 0.020 moles of magnesium will produce 0.020 moles of hydrogen gas.
Moles of gas : 0.020 mol
At STP, 1 mol of gas occupies 22.4 L
So volume of 0.020 mol of produced at STP :
= 22.4/times 0.020 = 0.448 L = 448 mL (1L=1000mL)
<u>Answer:</u> The equilibrium concentration of is 0.332 M
<u>Explanation:</u>
We are given:
Initial concentration of = 2.00 M
The given chemical equation follows:
<u>Initial:</u> 2.00
<u>At eqllm:</u> 2.00-2x x x
The expression of for above equation follows:
We are given:
Putting values in above expression, we get:
Neglecting the value of x = 1.25 because equilibrium concentration of the reactant will becomes negative, which is not possible
So, equilibrium concentration of
Hence, the equilibrium concentration of is 0.332 M