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Answer to Question #94920 in General Chemistry for Hassan Fallous
Question #94920
What is the total mass of these 70 cobalt atoms (in grams)? Express your answer to 2 significant figures.
TIP: To report an answer in scientific notation, enter it using the format "2.3E4", which means "2.3 x 104" (without the quotation marks)
TIP: To report an answer in scientific notation, enter it using the format "2.3E4", which means "2.3 x 104" (without the quotation marks)
Expert's answer
nCo=NCo/NA = 11.62E-23
mCo = n*M = 11.62E-23*59= 685.82E-23
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