For unlimited access to Homework Help, a Homework+ subscription is required.
Moles of Zn(NO3)2 in 151.50 g of this substance.Express your answer using four significant figures.
Number of molecules in 6Ã10â6 mol CH3CH2OH. Express your answer using four significant figures.
Number of N atoms in 0.550 mol NH3. Express your answer using three significant figures.
1.How many atoms are in each elemental sample? 3.7 mol Cu express your answer using two significant figures
5.7Ã10â3 mol C express your answer using two significant figures
22.6 mol Hg express your answer using three significant figures
0.155 mol Na express your answer using three significant figures
2. How many formula units make up 10.0 g of magnesium chloride (MgCl2)?
3. How many atoms are in each elemental sample? 5.6Ã1024 Pb atoms Express your answer using two significant figures.
2.02Ã1022 He atoms Express your answer using three significant figures.
6.46Ã1023 K atoms Express your answer using three significant figures.
4.54Ã1021 Ca atoms Express your answer using three significant figures.
What is the mass, in grams, of each of the following?
2.1Ã10?3 mol Sb
Express your answer using two significant figures.
3.52Ã10?2 mol Ba
Express your answer using three significant figures.
43.6 mol Xe
1.1 mol W