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ICE Princess25 [194]
3 years ago
5

If a sample of magnesium has a mass of 60.0 g, how many moles of magnesium does the sample contain

Chemistry
1 answer:
Tanzania [10]3 years ago
3 0

 the moles  of magnesium does  the sample contain  is  2.469  moles


calculation

moles    of Mg= mass  of Mg /molar mass  of Mg

mass  of Mg = 60.0 g

From periodic table, the molar  mass  of  Mg =24.3 g/mol


The moles of  mg  is therefore=  60.0 g / 24.3 g/mol = 2.469 moles

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Number of grams in 1 mole = 6.23 * 10^23
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In short, Your Answer would be Option C

Hope this helps!
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5 0
3 years ago
How many carbon atoms are in 7.05 moles of pyridine
NemiM [27]
First, it is best to know the chemical formula of pyridine which is C5H5N. To determine the number of carbon atoms present in pyridine, multiply 7.05 mol C5H5N with 5 mol C/ 1 mol C5H5N which then results to 35.35 mol of carbon. Then, multiply the answer to Avogadro's number which is 6.022x10^23 atoms. It is then calculated that the number of carbon atoms in 7.05 moles of pyridine is 2.12x10^25 atoms. 
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3 years ago
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