What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Question

Tristian Stanley

Chemistry

20 September, 00:53

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

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Saul Blackwell · Answer 1

1.54 x 10^5 mg The atomic weight of nickel is 58.6934 Since you have 2.63 moles, the mass will be 2.63 * 58.6934 = 154.3636 grams. Multiply by 1000 to get milligrams 154.3636 * 1000 = 154363.6 g Convert to scientific notation 1.543636 x 10^5 Look at the available options and see what matches. 3.56 x 10^5 mg; Nope, way too big 1.54 x 10^5 mg; Matches to the number of significant figures given. 2.23 x 10^4 mg; Nope, way too small 129 mg; Nope, way too small.