Stochiometry
Authored by Tóth Edina
Chemistry, English
11th Grade
NGSS covered
Used 408+ times
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10 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
___NH3 + ___O2 → ___NO2 + ___H2O
The balanced equation shows that 1.00 mole of NH3 requires ___ mole(s) of O2
0.57
1.25
1.33
1.75
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Write a balanced equation for the combustion of acetaldehyde. The equation indicates that ___ mole(s) of O2 are required for each mole of it.
1
2
2.5
3
5
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What is the total mass of products formed when 16 grams of CH4 is burned with excess oxygen?
32 g
36 g
44 g
62 g
80 g
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Balance the following equation with the SMALLEST WHOLE NUMBER COEFFICIENTS possible. Select the number that is the sum of the coefficients in the balanced equation: ___KClO3 → ___KCl + ___O2
3
5
6
7
8
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Calculate the mass of hydrogen formed when 27 g of aluminum reacts with excess hydrochloric acid according to the balanced equation below. 2Al + 6HCl → 2 AlCl3 + 3 H2
1.5 g
2.0 g
3.0 g
6.0 g
12 g
Tags
NGSS.HS-PS1-7
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
How many grams of nitric acid, HNO3, can be prepared from the reaction of 138 g of NO2 with 54.0 g H2O according to the equation below?
3NO2 + H2O → 2HNO3 + NO
92
108
126
189
279
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following statements is true?
I. The molar mass of CaCO3 is 100.1 g mol−1.
II. 50 g of CaCO3 contains 9 ×1023 oxygen atoms.
III. A 200 g sample of CaCO3 contains 2 moles of CaCO3
None of them
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