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Which of the following is not a potential sign of chemical change
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
How many atoms are in a single molecule of FE2O3
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
The chemical element that is most abundant in the human body is
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
Solids liquids, and gases are three forms of matter that
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
A molecule of water H2O is made from____________ combining two hydrogen atoms and one oxygen atom
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
Lead has a density of 11.3 g/cm3 and a mass of 282.g. What is its volume
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
The chemical formula for water (H2O) means that each water molecule contains
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
You put 1 spoonful of salt into 1 Liter of water and stir. The resulting liquid is an example of a(n)
chemically
carbon
25 cm3
5
evaporation of water
all the answers are correct
two hydrogen and one oxygen atoms
homogeneous mixture
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