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Which equation represents conservation of mass and energy?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
Which statement describes a chemical property of iron?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
Diamond and graphite are two forms of solid carbon. These two forms of carbon have
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
When a ground state electron in an atom moves to an excited state, the electron
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
At STP, which property can be used to differentiate a 10.-gram sample of NaCl(s) from a 10.-gram sample of NaNO3(s)?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
What is the number of electrons shared between the two atoms in an O2 molecule?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
Which substance can be broken down by a chemical change?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
Which two particles each have a mass of approximately one atomic mass unit?
4
absorbs energy as it moves to a higher energy state
ethane
solubility in water
different crystal structures and different properties
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + 890.4 kJ
Iron reacts with nitric acid.
a neutron and a proton
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