1. Write the chemical formula for each of the following acids:

a.) hydrocyanic acid
b.) oxalic acid
c.) chlorous acid
d.) nitric acid

2. Write the acid name or chemical formula for each of the following:
a.) HBr
b.) sulfurous acid
c.) HClO4
D.) phosphoric acid

3. First classify each of the following substances as an acid, a base or salt. then write the name or chemical formula. if the substance is an acid, write the acid name.
a.) potassium hydroxide
b.) KNO3
C.) Mg(OH)2
D.) HI
e.) sodium sulfate
f.) HClO4
G.) aluminum hydroxide
H.) H2CrO4

Thanks:)

Search with Google.

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hydrocyanic acid

resulting first link is:

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HCN

1. The chemical formula for each of the following acids is:

a) Hydrocyanic acid: HCN
b) Oxalic acid: H2C2O4
c) Chlorous acid: HClO2
d) Nitric acid: HNO3

2. The acid name or chemical formula for each of the following is:
a) HBr: Hydrobromic acid
b) Sulfurous acid: H2SO3
c) HClO4: Perchloric acid
d) Phosphoric acid: H3PO4

3. Classifying and providing the name or chemical formula for each substance:

a) Potassium hydroxide: Base - KOH
b) KNO3: Salt - Potassium nitrate
c) Mg(OH)2: Base - Magnesium hydroxide
d) HI: Acid - Hydroiodic acid
e) Sodium sulfate: Salt - Na2SO4
f) HClO4: Acid - Perchloric acid
g) Aluminum hydroxide: Base - Al(OH)3
h) H2CrO4: Acid - Chromic acid

Sure! Here are the answers to your questions:

1. To write the chemical formula for each acid, you need to know the valency of each element in the acid compound. Here are the chemical formulas:
a.) Hydrocyanic acid: HCN
b.) Oxalic acid: H2C2O4
c.) Chlorous acid: HClO2
d.) Nitric acid: HNO3

2. To determine the acid name or chemical formula, you can use the clues provided:
a.) HBr: This is a binary acid. The prefix "hydro-" indicates that it's a non-oxygen-containing acid and the suffix "-ide" indicates it is a binary acid. So the acid name is hydrobromic acid.
b.) Sulfurous acid: The "-ous" suffix means the acid contains less oxygen compared to the "-ic" form. The chemical formula is H2SO3.
c.) HClO4: This is a binary acid compound. The prefix "hydro-" is not present, and "chlor-" indicates chlorine. The suffix "-ic" indicates that there are oxygen atoms present. So the acid is perchloric acid.
d.) Phosphoric acid: The "-ic" suffix indicates that this acid has oxygen atoms. The chemical formula is H3PO4.

3. Now let's classify each substance as an acid, a base, or a salt and provide the name or chemical formula:
a.) Potassium hydroxide: This is a base. The chemical formula is KOH.
b.) KNO3: This is a salt. The name of this compound is potassium nitrate.
c.) Mg(OH)2: This is a base. The chemical formula is magnesium hydroxide.
d.) HI: This is an acid. The name of the acid is hydroiodic acid.
e.) Sodium sulfate: This is a salt. The chemical formula is Na2SO4.
f.) HClO4: This is an acid. The name of the acid is perchloric acid.
g.) Aluminum hydroxide: This is a base. The chemical formula is Al(OH)3.
h.) H2CrO4: This is an acid. The name of the acid is chromic acid.

I hope that helps! Let me know if you have any further questions.