Question

calculate mole of 1.5kg of MgO with step​

Answer 1

Answer:

1.first you need to change the weight into gram.

2. now you should divide the mass ( in gram) with molar mass of mgo.

3. you will get the answer.

Explanation:

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Answer 2

Answer:

Use the formula: n = m/M; where n = moles, m = mass (g), and M = molar mass (g/mol).

First convert 1.5 kg to grams.

1.5 kg MgO × 1000 g/kg = 1500 g MgO

m(MgO) = 1500 g MgO

M(MgO) = 24.305 g/mol Mg + 15.999 g/mol O = 40.304 g MgO/mol MgO

n(MgO) = 1500 g MgO/40.304 g MgO/mol MgO = 37 mol MgO to two significant figures