HCOOH is: formaldehyde formic acid acetone carbon hydroxide
1 answer:
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Answer:
Explanation:
When adding or subtracting values, you must round your answer to the same "place" as the measurement with its last significant figure furthest to the left.
That is, you round off to the same number of decimal places as the measurement with the fewest decimal places.
The measurement of 28.1 cm has one digit after the decimal point, so you round the sum to have only one digit to the right of the decimal.
However, the number to be dropped (51) is greater than 5 with only zeros or nothing following the 5.
You must round up the answer. You increase the last significant digit by one.
<u>Answer: </u>
<u>For 1:</u> 3.3 moles of oxygen gas is required.
<u>For 2:</u> 14 moles of hydrogen gas is required.
<u>For 3:</u> 1.5 moles of oxygen gas is required.
<u>Explanation:</u>
The chemical reaction of oxygen and hydrogen to form water follows:
- <u>For 1:</u> When 6.6 moles of
is reacted.
By Stoichiometry of the above reaction:
2 moles of hydrogen gas reacts with 1 mole of oxygen gas.
So, 6.6 moles of hydrogen gas will react with = of oxygen gas.
Hence, 3.3 moles of oxygen gas is required.
- <u>For 2:</u> When 7.0 moles of
is reacted.
By Stoichiometry of the above reaction:
1 mole of oxygen gas reacts with 2 moles of hydrogen gas.
So, 7 moles of oxygen gas will react with = of hydrogen gas.
Hence, 14 moles of hydrogen gas is required.
- <u>For 3:</u> When 3.0 moles of
is formed.
By Stoichiometry of the above reaction:
2 moles of water is formed from 1 mole of oxygen gas.
So, 3.0 moles of water will be formed from = of oxygen gas.
Hence, 1.5 moles of oxygen gas is required.