Chemistry, 06.07.2019 21:50 chrisraptorofficial

Q3.6: calculate the number of po43- ions present in 23.7 g of ca3(po4)2.

Answers: 1

Show answers

Answers

Moles of ca3(po4)2 = 23.7 / 310.17 = 0.076

moles of (PO4)3- = 0.076 x 2 = 0.152

now, no. of ions = 0.152 x 6.022 x 10^{23}

= 9.2 x 10^{22}

Answer from: AeelynRamos

23.7 g of Ca₃(PO₄)₎₂ contains 9.20 x 10^22 ions of PO₄³⁻

23.7 g of Ca₃(PO₄)₎₂ contains 0.1528 moles of PO₄³⁻ which is equivalent to 9.20 x 10^22 ions of PO₄³⁻

Further Explanation:An AtomAn atom is the smallest particle of an element that can take part in a chemical reaction. For example, sodium atom, Na. A MoleculeA molecule is a substance that is made up of one or more atoms. The atoms in a molecule may be similar or different making a compound. A compound A compound is a substances that contains two or more different atoms that are bonded together. When the atoms are similar the substance is known as a molecule, therefore not all molecules are compounds.Ca₃(PO₄)₎₂ is an example of a compound that contains three calcium ions and two Phosphate ions.

Therefore;

Ca₃(PO₄)₎₂ ionizes to give out 3 Ca²⁺ ions and 2 PO₄³⁻ ions

Ca₃(PO₄)₎₂ → 3Ca²⁺ + 2PO₄³⁻

Required to determine the number of ions of PO₄³⁻ ions

Step 1: Moles of Ca₃(PO₄)₎₂

Number of moles = Mass /Molar mass

Molar mass of Ca₃(PO₄)₎₂ = 310.1767 g/mol

Thus;

Moles = 23.7 g/310.1767 g/mol

= 0.0764 moles

Step 3: Moles of PO₄³⁻ ions

1 mole of Ca₃(PO₄)₎₂ ionizes to give 2 moles PO₄³⁻ ions

Therefore;

0.0764 moles will produce;

= 0.0764 moles x 2

= 0.0152 moles PO₄³⁻ ions

Step 3: Number of PO₄³⁻ ions

1 mole of PO₄³⁻ ions contains 6.022 x 10^23 ions

Therefore;

0.01528 moles PO₄³⁻ ions contains;

= 0.01528 x 6.022 x 10^23 ions

= 9.20 x 10^22 ions

Keywords: Atoms, ions, Moles, molar mass

Learn more about; Atom: Molecules Compounds Avogadro’s constant: Molecular mass:

Level: High school

Subject: Chemistry

Topic: Moles

Sub-topic: Avogadro's constant

Answer from: Quest

i'm wiling to try and you : )

Answer from: Quest

They are all solids.

Another question on Chemistry

Chemistry, 21.06.2019 23:50

2points what is the job of a scientist? a. to answer ethical questions. b. to write laws based on his or her knowledge. c. to ask and answer scientific questions. d. to ignore facts that do not support his or her theory.

Answers: 1

Answer

Chemistry, 22.06.2019 10:00

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

Answers: 1

Answer

Chemistry, 22.06.2019 14:30

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

Answers: 1

Answer

Chemistry, 22.06.2019 15:20

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro

Answers: 3

Answer

You know the right answer?

Q3.6: calculate the number of po43- ions present in 23.7 g of ca3(po4)2....

Questions