week 6 term 3 grade 11 sabis quiz 1

The mass percent of carbon in the hydrocarbon is ___% (to three significant figures).

Calculate the average atomic mass of the element given the mass spectrum data. The average atomic mass is ___.

The total number of moles of ions present in 200. cm³ of 0.10 M Na₂CO₃ is ___ moles (to two significant figures).

In a solution where AlCl₃ is dissolved to get [Cl⁻] at 0.20 M, the concentration of [Al³⁺] is ___ M (to two significant figures).

The molarity of HCl in the final solution after dilution is ___ M (to three significant figures).

The mass of H₂SO₄ needed to prepare 500 cm³ of a 2.0 M solution is ___ g (to two significant figures).

The volume of 0.600 M KOH solution needed to neutralize 75.0 mL of 0.500 M H₂SO₄ solution is ___ mL (to three significant figures).

Calculate the total number of moles of ions present in 200 cm³ of 0.10 M Na₂CO₃.

• A. 0.020 moles

• B. 0.040 moles

• C. 0.060 moles

• D. 0.080 moles

What mass of H₂SO₄ is needed to prepare 500 cm³ of a 2.0 M solution? (H₂SO₄ = 98)

• A. 49 g

• B. 98 g

• C. 196 g

• D. 392 g

The mass is ........g