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4.A mass of one kg of nickels has a monetary value in the US \$ of approximately:
a. \$1 b. 10 cents c. \$10 d. \$1000

is it c?

A U. S. nickel has a mass of 5.0 grams. So 1 kg = 1,000 grams and 1000 grams at 5g/nickel must be 200 nickels. How much money would that be at 5 cents/coin?

yes, c is correct.

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