3 years ago

What is the mass of 99.0 L of NO2 at STP?

Chemistry

1 answer:

vekshin13 years ago

7 0

Mass of NO₂= 203.32 g

<h3>Further explanation</h3>

Given

99.0 L of NO₂

Required

Mass of NO₂

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters / mol.

So mol NO₂ :

= 99 : 22.4

= 4.42

Mass :

= mol x MW

= 4.42 x 46 g/mol

= 203.32 g

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What is the concentration in molarity of S2O32- (aq) in a solution prepared by mixing 150 mLmL of 0.149 MM Na2S2O3 (aq) with eno

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Answer:

0.0890 M

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Since the concentration of KCl is irrelevant in this case, the concentration of Na2S2O3 can be determined using a simple dilution equation:

C1V1 = C2V2, where C1 = 0.149 M, V1 = 150 mL, V2 = 250 mL

C2 = 0.149 x 150/250

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3 years ago

What is the mass percent when 96 grams of NaCl is dissolved in 255 grams of water

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