There are 3.45 moles of (nh_4)_2 so_4, how many grams is this?

455.4 g (NH_4)2 SO_4

Explanation:

Given:

no of moles of (NH_4)2 SO_4 , n=3.45 moles

To find:

The mass (w) of (NH_4)2 SO_4 in 3.45 moles (n)of it.

Molar mass (M) of (NH_4)2 SO_4 = 132 g

No of moles n is given by the formula;

n is no. of moles

w is mass of the compound

M is the molar mass of the compound

Substituting the values in the formula,

w=3.45 × 132=455.4g

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a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.