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# Stoichiometry Unit Review PowerPoint PPT Presentation

Stoichiometry Unit Review. How many grams are equal to 1.50 moles of krypton?. .0179 41.9 83.8 126 9.03 x 10 23. 4. How many moles of cobalt are equal to 4.7 x 10 23 atoms of cobalt?. .080 .78 1.3 46 2.8 x 10 25. 0. How many moles of zirconium are equal to 270 grams of zirconium?.

Stoichiometry Unit Review

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## Stoichiometry Unit Review

• .0179

• 41.9

• 83.8

• 126

• 9.03 x 1023

4

• .080

• .78

• 1.3

• 46

• 2.8 x 1025

0

• 2.96

• 4.49

• 91.2

• 24,629

• 1.78 x 1024

0

### 243.52 grams of antimony is equal to _______ mole(s) of antimony or _______ atom(s) of antimony.

• 1; 6.02 x 1023

• 2; 6.02 x 1023

• 2; 1.20 x 1024

• .5; 1.20 x 1024

• 2; 2

0

### What is the molar mass of sulfuric acid, H2SO4?

• 25

• 49

• 67

• 98

• 194

13

0

Sodium sulfide and cadmium(II) nitrate undergo a double replacement reaction. What is the mass of cadmium sulfide that can be produced from 5.00 g of sodium sulfide?Na2S + Cd(NO3)2 2 NaNO3 + CdS

• 0.34 g

• 0.64 g

• 4.69 g

• 9.38 g

• 18.8 g

0

Hydrogen and nitrogen gases can be combined to form ammonia gas, NH3. How many moles of N2 are required to form 27.0 g of ammonia?3 H2 + N2 2 NH3

• 0.79 mol

• 1.59 mol

• 3.17 mol

• 44.4 mol

• 88.8 mol

• 0.0 g

• 21.5 g

• 64.8 g

• 88.4 g

• 166 g

0

### What is the percent yield if 35 grams of SO3 is produced from 50 grams of SO2?2SO2 + O2 → 2SO3

• 15%

• 30%

• 56%

• 80%

• 94%

30

Determine the percent yield of hydrogen if 12.5 grams of hydrogen is collected from the reaction of 500 g of zinc with 500 g of HCl.Zn(s) + 2HCl(aq) ↔ H2(g) + ZnCl2(aq)

• 14%

• 46%

• 77%

• 91%

• 110%

30