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Worksheetsmultiple choice
Total questions: 14
Worksheet time: 7mins
hydrochloric acid formula HCl
true
false
how many valence electrons does an oxygen atom have ?
2
6
8
16
how many milligrams are in 0.2 decigrams
20 milligrams
2000 milligrams
0.002 milligrams
0.00002 milligrams
what would be the volume in liters of 640g of oil if the density of the oil is 0.8g/mL ?
800 liters
0.8 liters
512 liters
0.5 liters
how many significant figures are present in the number 10450 ?
3
4
5
non of the above
what is the appropriate SI unit for distance ?
centimeters
inches
meters
kilometers
which of the following is a chemical property ?
copper sulfate crystals are blue
water boils at 100 degree C
chlorine is a gas at room temperature
sodium reacts with oxygen in the air to form a white oxide
which of the following is an example of a pure substance that is made up of only one kind of atoms ?
Iron
water
sand
salt water
An example of an extensive property is :
Boilling point
Mass
Melting point
Density
Identify the correct answer for the following calculation : 3.000x4.00x0.00321x100 ?
3.852
3.85
3.9
4
A homogenous material is defined as being:
An element
Any material with uniform compostion
synonymous with solution
both B and C
What is the empirical formula for a compound that contains 17.34% hydrogen and 82.66% carbon ?
C5H
C2H5
CH3
CH2
One mole of (NH4)2HPO4 contains ? moles of hydrogen atoms
1
5
6
9
how many moles of CO2 are present in 220 mg ?
5 moles
0.005 mole
5000 moles
10 moles
