M(CaSO4) = 136.14 g/mol
"n=\\frac{m}{M} \\\\\n\n= \\frac{157}{136.14}=1.153 \\;mol"
Proportion:
1.153 mol – 724 mL
x mol – 1000 mL
"x = \\frac{1.153 \\times 1000}{724}= 1.59 \\;mol\/L \u22481.6 \\;M"
Answer: 1.6 M
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