Chemistry
Stoichiometry
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#1 How many numbers of atoms are there in 46 amu of sodium?
A) 3
B) 4
C) 2
D) 2.5
#2 How many numbers of molecules are there in 8 amu of hydrogen gas?
A) 2
B) 2.5
C) 3.5
D) 4
#3 The atomic mass of an element is measured relative to the mass of
A) Hydrogen atom
B) Oxygen atom
C) carbon -12
D) Isotopic Mixture of 12C, 13C and 14C
#4 How many amu are there in 16g of oxygen?
A) 9.63 x 1024
B) 1.602 x 1025
C) 6.12 x 1022
D) 1.64 x 1023
#5 How many grams are there in 48 amu of carbon?
A) 7.8 x 10-23
B) 8.7 x 10-25
C) 9.11 x 10-28
D) 1.6 x 10-23
#6 A mole of any substance is related to
A) Number of particles
B) Volume of gaseous substance
C) Mass of a substance
D) all of the above
#7 1 amu is equivalent to
A) 1.66 x 10-24 g
B) 1.66 x 10-27 kg
C) 1.66 x 10-21 mg
D) All of the above
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