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Natalka [10]
3 years ago
15

One and a half gallons of paint are used on refrigeration units which are then baked dry in a 275F oven for 2 hours. If the pain

t contains 5% solids and uses hexane as the solvent, what is the evaporation rate in pints per minute
Chemistry
1 answer:
brilliants [131]3 years ago
4 0

Answer:

Hence the evaporation rate in pints per minute is 0.001583.

Explanation:

Now,

1.5 gallons of paint are used.

It has 5% solid, so total 95% of 1.5 gallon can evaporate(only the solvent part will evaporate).

95% of 1.5 gallon=(95/100)*1.5 = 1.425 gallons.

1gallon = 8 pints.

So 1.425 gallons=8*1.425 pints

=11.4 pints.

Evaporation requires 2 hours. That is 3600*2 seconds = 7200 seconds.

So evaporation rate= 11.4 pints/7200 seconds.

=0.001583 pints per second

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A compound with the empirical formula CH 2 O has a formula mass of 180 g/mol. What is its molecular formula
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Empirical formula mass

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Molecular fornula mass:-180g/mol

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2 years ago
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3 years ago
How many moles of silver are there in 6.9 x 10^28 silver atoms?
Juli2301 [7.4K]

Answer:

1.2 x 10⁵ moles Ag (2 sig. figs.)

Explanation:

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∴ 6.9 x 10²⁸ atoms Ag = 6.9 x 10²⁸ Ag atoms / 6.023 x 10²³ Ag atoms/mole Ag

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                                    = 1.2 x 10⁵ moles Ag (2 sig. figs.)

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