Chemistry Test Question Preview (ID: 5047)
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which of the following is an example of a chemical change
a) water boiling
b) breaking glass
c) paper burning
d) ice melting
an element that has properties of both metals and nonmetals is
a) solid
b) liquid
c) gas
d) metalloid
a property of matter that can be observed without changing the identity of the matter is
a) toxicity
b) solubility
c) reactivity
d) flammability
which of the following is not a state of matter
a) plasma
b) liquid
c) solid
d) gas
which elements do not chemically combine with other elements
a) halogens
b) noble gases
c) alkali metal
d) transition metal
when two elements combine in a chemical reaction the mass of the new substance:
a) is calculated by multiplying the mass of the reactants
b) is calculated by dividing the mass of the reactants
c) is calculated by adding the mass of the reactants
d) is calculated by subtracting the mass of the reactants
the law of conservation of mass states that
a) matter is destroyed in a chemical reaction
b) the total mass of the reactants is the same as the total mass of the products
c) the total mass of the reactants is less than the total mass of the products
d) the mass of the reactants and products can not be accurately measured
Sodium is classified as a
a) metalloid
b) nonmetal
c) metal
d) actinide
Sodium has how many protons
a) 5
b) 11
c) 22
d) 23
What is the ratio of oxygen molecules in water as opposed to hydrogen peroxide
a) 1 to 2
b) 4 to 7
c) 3 to 5
d) 2 to 3
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