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7. value 0.00 points 3 attempts left Check my work Calculate the number of mol corresponding to 19.0 g Be. Enter your answer
value 1.00 points 3 attempts left Check my work Calculate the number of mol corresponding to 0.065 kg Si. Enter your answer i
9. value 0.00 points 3 attempts left Check my work What is the average molar mass of the following elements? Be sure to answe
10. value 1.00 points 3 attempts left Check my work What is the average molar mass of each of the following? Be sure to answe
11. value 0.00 points 3 attempts left Check my work Calculate the number of atoms of copper in 5.72 g of copper. Give your an
12. value 1.00 points 3 attempts left Check my work Be sure to answer all parts. How many nitrogen atoms are present in 70.0
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di no. of moles of beryllium = 19 = 2.11 mol 0 9 .9 2) no. of moles of silicon = 00065 x 103 = 2.32 ml 28 03 average molar mo

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