CHEMISTRY MIDDLE SCHOOL

What is the formula mass of calcium sulfate dihydrate [CaSO4⋅2H2O]?Be sure to add the water of hydration, which is the 2H2O part (water surrounding the calcium sulfate).

136 g/mol

154 g/mol

164 g/mol

172 g/mol

172 is correct

Answers

Answer 1

Answer:

Answer:

Option d = 172 g/mol

Explanation:

Formula mass of [CaSO₄.2H₂O]

Formula mass = 40.078 + 32.065 + 4×16 + 4 + 16×2

Formula mass = 40.078 + 32.065 + 64 + 4 + 32

Formula mass = 172.143 g/mol

so, 172 g/mol is the correct answer.

Answer 2

Answer:

The formula mass of compound calcium sulfate dihydrate is 172 g/mole.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

The formula mass of compound = 40+32+16×4+4+32=172 g/mole.

Learn more about compound,here:

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Answers

Answer:

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Explanation:

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PLEASE HELP!!!! I NEED THIS TONIGHT!!!

Answers

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The reaction 4Fe + 3O2 >> 2Fe2O3 is an example of what?

Answers

Answer:

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Explanation:

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B.
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C.
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D.
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Answers

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Answers

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