A common chemicals used as a rising agent
1 answer:
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Answer : The mass of water produced will be 32.78 grams.
Explanation : Given,
Mass of = 21.9 g
Molar mass of = 72.15 g/mole
Molar mass of = 18 g/mole
First we have to calculate the moles of .
Now we have to calculate the moles of .
The balanced chemical reaction will be,
From the balanced reaction we conclude that
As, 1 mole of react to give 6 moles of
So, 0.3035 moles of react to give
moles of
Now we have to calculate the mass of .
Therefore, the mass of water produced will be 32.78 grams.
Answer:
1.48×10²⁴ Cu atoms
Explanation:
For this question you need to use Avogadro's number 6.022×10²³atoms.
2.45 moles of Cu ×= 1.47539×10²⁴ atoms.
The moles cancel out so you are left with atoms.
Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.