Question

Calculate the mass of 0.8 mol of KOH​

Answer 1

Answer:

44.8g

Explanation:

molar mass of k= 39, O= 16, H= 1

molecular mass of KOH= 56g/mol

N=m/Mm

0.8=m/56

m= 0.8×56

m= 44.8g

Answer 2

Mass is "a measure of the amount of matter that an object contains".

What is matter?

Matter is "any substance that has mass and takes up space by having volume".

The formula to calculate the molar mass is M = m/n

where M is molar mass

           m is mass of substance in grams

           n is no. of moles of a substance.

The molecular mass of KOH is 56.105 g/mol

molar mass of K= 39, O= 16, H= 1

M = m/n

 0.8 = m/56.105

    m = 0.8 x 56.105

     m  = 44.8g

Hence, the mass of 0.8 mol of KOH is 44.8g

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