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3 years ago

What is the mass of 0.28 mol of iron

Chemistry

2 answers:

GarryVolchara [31]3 years ago

6 0

1 mole has mass = 56 g <span>
</span>0.28 mol has mass = 56 x 0.28 = 15.68 g<span> </span>

maria [59]3 years ago

5 0

Mass = number of mol x molar mass
Mass = 0.28mol x 55.8g/mol
Mass = 15.624g

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2 years ago

What is the value for the reaction: N2(g) + 2 O2(g) --> N2O4(g) in terms of K values from the reactions:

Valentin [98]

Answer : The correct expression will be:

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Explanation :

The chemical reactions are :

(1) $\frac{1}{2}N_2(g)+\frac{1}{2}O_2(g)\rightleftharpoons NO(g)$ $K_1$

(2) $2NO(g)+O_2(g)\rightleftharpoons N_2O_4(g)$ $K_2$

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3 years ago

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3 years ago

Complete combustion of 3.20g of a hydrocarbon produced 9.69g of CO2 and 4.96g of H2O. What is the empirical formula for the hydr

vlabodo [156]

Let empirical formula for hydrocarbon is CxHy

it will undergo combustion as

CxHy + (x + y/4) O2 ---> xCO2 + (y/2 )H2O

Given that mass of CO2 produced = 9.69 g

So moles of CO2 produced = 9.69 / 44 = 0.22 moles

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Multiplying with two to get whole number

the ratio of carbon and hydrogen will be : C:H = 2:5

empirical formula : C2H5

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2 years ago

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