stoichiometry & mole concept

Quiz
•
Science, Chemistry
•
9th - 10th Grade
•
Hard
Standards-aligned

Husain Wahyd
Used 58+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Mg + H2SO4 → MgSO4 + H2
In this reaction, What is the mass of magnesium sulfate formed when 6g of magnesium react with excess sulfuric acid.
[Ar: H,1; O,16; Mg,24; S,32]
8
24
30
60
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A compound X contains 82.76% of carbon by mass and 17.24 of hydrogen by mass. The empirical formula of compound X is:
C6H5
C2H5
C3H8
CH3
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Compound X has and empirical formula of C2H5 and a molecular mass of 58. The molecular formula of X is:
C6H12O6
C4H10
C2H5OH
CH3COOH
Tags
NGSS.HS-PS1-1
4.
MULTIPLE SELECT QUESTION
5 mins • 1 pt
Which two of the following contain the same number of molecules?
2.0g of Methane, CH4
8.0g of Oxygen, O2
2.0g of Ozone, O3
8.0g of Sulfur dioxide, SO2
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
4.8g of calcium is added to 3.6g of Water. The following reaction occurs.
Ca + 2H2O → Ca(OH)2 + H2
What Reagent is in excess?
Calcium
Water
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
In the same reaction where 4.8g of calcium is added to 3.6g of Water.
Ca + 2H2O → Ca(OH)2 + H2
What is the mass of the excess reagent that remained at the end of the experiment
8g
0.08g
0.8g
88g
Tags
NGSS.HS-PS1-7
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Ethanol is manufactured from Glucose C6H12O6 by fermentation
C6H12O6 → 2C2H5OH + 2CO2
In an experiment, 30.0g of glucose was fermented.
What is the number of moles of glucose in 30.0g
0.157
0.167
0.186
0.159
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