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The chemical formula for water (H2O) means that each water molecule contains
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
A molecule of water H2O is made from____________ combining two hydrogen atoms and one oxygen atom
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
Solids liquids, and gases are three forms of matter that
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
How many atoms are in a single molecule of FE2O3
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
Which of the following is not a potential sign of chemical change
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
A material that can be represented by a chemical formula is
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
The chemical element that is most abundant in the human body is
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
Lead has a density of 11.3 g/cm3 and a mass of 282.g. What is its volume
carbon
25 cm3
chemically
all the answers are correct
a pure substance
5
evaporation of water
two hydrogen and one oxygen atoms
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