Question

d can be broken down by passing an electric current through water.
3. There are about 118 different
a elements
1 molecules.
c. compounds.
4. If you hear a liquid, it will ultimately change into
a solid
d. mixtures
b. a gas
a. air
e either a solid or a gas depending on temperature.
d. neither solid nor gas--it will always remain a liquid
5. When two elements are brought together, they
a. always form a mixture.
b. always form a compound.
c. may form a mixture or a compound depending on the conditions.
d. may form a mixture or a compound depending on what they like.
6. Which of the following is not a mixture?
b, sea water
c. pure water
d. soil
7. The valency of which of these elements is zero?
a. iron
b. helium
c. hydrogen
8. Which of these is the formula for calcium hydroxide?
a. CaOH
b. Ca,OH
c. Ca(OH)
d. Ca(OH)
9. The equation Na + H,O → NaOH + H,
is
a. correct.
b. incorrect since it is not balanced.
c. incorrect since sodium does not react with water.
d. incorrect since hydrogen should be written as H and not H,
d. oxygen
answers​

Answer 1

Answer:

H²O WILL BE THE RIGHT ANSWER

Answer 2

ans is caOH

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