Determine the number of molecules contained in 1 mole of sodium sulfate.

A) 1.204 x 10^24 ions

B) 1.807 x 10^24 ions

C) 2.007 x 10^23 ions

D) 6.022 x 10^23 ions

                       1.807 × 10²⁴ Ions

Explanation:

                    One mole of any substance contains exactly 6.022 × 10²³ particles which is also called as Avogadro's Number. Too calculate the number of particles (molecules) contained by 1.0 moles of Na₂SO₄, we will use following relation,

          Moles  =  Number of Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹

Solving for Number of Molecules,

          Number of Molecules  =  Moles × 6.022 × 10²³ Molecules.mol⁻¹

Putting values,

          Number of Molecules  =  1.0 mol × 6.022 × 10²³ Molecules.mol⁻¹

          Number of Molecules  = 6.022 × 10²³ Molecules of Na₂SO₄

Now,

Also Na₂SO₄ contains three ions, i.e.

                             Na₂SO₄   →   ( Na⁺ + Na⁺ + SO₄²⁻ )

Hence, the number ions will be calculated as,

No. of Ions  =  6.022 × 10²³ × 3

No. of Ions  =  1.807 × 10²⁴ Ions

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance