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pshichka [43]
3 years ago
13

A sample of gas has a mass of 14.2g and occupies a volume of 678ml at 25.0 c and a pressure of 0.80atm. What will the volume of

the gas be at STP
Chemistry
1 answer:
11Alexandr11 [23.1K]3 years ago
3 0

Answer:

497 ml

Explanation:

(678 ml) x (273 / (25 + 273)) x (0.8 atm / 1 atm) = 497 ml

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3 years ago
How many moles are present in 3.4 x 1023 atoms of Na?
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<h3><u>moles of H2SO4</u></h3>

Avogadro's number (6.022 × 1023) is defined as the number of atoms, molecules, or "units of anything" that are in a mole of that thing. So to find the number of moles in 3.4 x 1023 molecules of H2SO4, divide by 6.022 × 1023 molecules/mole and you get 0.5646 moles but there are only 2 sig figs in the given so we need to round to 2 sig figs. There are 0.56 moles in 3.4 x 1023 molecules of H2SO4

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