Question

In: Chemistry

How many moles are contained in each of the following? A. 27.0 g Ca Express your...

How many moles are contained in each of the following?

A. 27.0 g Ca

Express your answer using three significant figures.

B.

5.00 g S

C.

36.0 g H2O

D.

110.0 g O2

Expert Solution

A. 27.0 g Ca

Gram atomic weight of Ca(G.A.Wt) = 40g/mole

no of moles of Ca = W/G.A.Wt

= 27/40 = 0.675moles

B. 5.00 g S

Gram atomic weight of S(G.A.Wt) = 32g/mole

no of moles of S = W/G..A.Wt

= 5/32 = 0.156moles

C. 36.0 g H2O

Gram molecular weigh of H2O (G.M.Wt) = 18g/mole

no of moles of H2O = W/G.M.Wt

= 36/18 = 2.00 moles

D. 110.0 g O2

Gram molecular weigh of O2 (G.M.Wt) = 32g/mole

no of moles fo O2 = W/G.M.Wt

= 110/32 = 3.44moles

queen_honey_blossom answered 3 years ago

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