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Whitepunk [10]
3 years ago
7

Scientists are often interested in knowing the molar heat of combustion the heat released during the combustion of one molar of

a substance use a periodic table to find molar masses.
How many moles of ethanol are present in the sample?

? Mol
Chemistry
2 answers:
Butoxors [25]3 years ago
6 0

Answer:

.004993

Explanation:

lozanna [386]3 years ago
6 0

Answer: .004993

Explanation:

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What is the total number of atoms in 0.20 mol of propanone, CH3COCH3?
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Answer:

1.2×10²³ atoms.

Explanation:

Data obtained from the question include:

Mole of propanone = 0.20 mole

Number of atoms of propanone =.?

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.022×10²³ atoms.

This implies that 1 mole of propanone also contains 6.022×10²³ atoms.

Thus, we can obtain the number of atoms in 0.20 mole of propanone as illustrated below:

1 mole of propanone contains 6.022×10²³ atoms.

Therefore, 0.20 mole of propanone will contain = 0.2 × 6.022×10²³ = 1.2×10²³ atoms.

Thus, 0.20 mole of propanone contain

1.2×10²³ atoms.

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