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Calculate the mass in grams of each of the followinga. 5.94 x 10^20 H2O2 moleculesb. 2.8 x 10^22 SO2 moleculesc. 4.5 x 10^25 O3 moleculesd. 9.85 x 10^19 CH4 molecules

User Mook
by
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1 Answer

4 votes

Answer:


0.0335\ \text{g}


2.978\ \text{g}


3586.84\ \text{g}


0.0026\ \text{g}

Step-by-step explanation:

Mass in grams is given by


m=(nM)/(N_A)

where

n = Number of molecules


N_A = Avogadro's number =
6.022* 10^(23)\ \text{mol}^(-1)

M = Molar mass of molecule

Molar mass of
H_2O_2 = 34.0147 g/mol


n=5.94* 10^(20)


m=(5.94* 10^(20)* 34.0147)/(6.022* 10^(23))\\\Rightarrow m=0.0335\ \text{g}

Mass of
H_2O_2=0.0335\ \text{g}

Molar mass of
SO_2 = 64.066 g/mol


n=2.8* 10^(22)


m=(2.8* 10^(22)* 64.066)/(6.022* 10^(23))\\\Rightarrow m=2.978\ \text{g}

Mass of
SO_2=2.978\ \text{g}

Molar mass of
O_3 = 48 g/mol


n=4.5* 10^(25)


m=(4.5* 10^(25)* 48)/(6.022* 10^(23))\\\Rightarrow m=3586.84\ \text{g}

Mass of
O_3=3586.84\ \text{g}

Molar mass of
CH_4 = 16.04 g/mol


n= 9.85* 10^(19)


m=(9.85* 10^(19)* 16.04)/(6.022* 10^(23))\\\Rightarrow m=0.0026\ \text{g}

Mass of
CH_4=0.0026\ \text{g}

User Gkhaos
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