T3W7 Thu (Y11 Chem)

Jonesy is having a Rum, dry and lime on a Sat night with his brothers. The bottle states that it is 4.8 % v/v alcohol.

What volume (in mL) of ethanol (alcohol) are in 100 mL of his drink?

• 4.80%

• 4.8 mL

• 48.0 mL

• 0.0048 L

• 0.048 L

Jonesy decides to mix his own Rum, dry and lime. He ends up putting 45 mL of ethanol into a drink with a total volume of 750 mL.

What % v/v alcohol is Jonesy's drink?

• 16.6 % v/v

• 0.06 % v/v

• 4.5 % v/v

• 6.0 % v/v

• 0.60 % v/v

When you eat canned food, small amounts of tin dissoves. In this 425 g can of fruit salad, 60.0 mg of tin is present.

What is this concentration in ppm?

• 141 ppm

• 425 ppm

• 60.0 ppm

• 7.08 ppm

• 70.8 ppm

When you eat canned food, small amounts of tin dissoves. In this 425 g can of fruit salad, 60.0 mg of tin is present.

What is this concentration in % m/m (hint, remember to convert mg to g)?

• 0.708 % m/m

• 7.08 % m/m

• 6.00 % m/m

• 1.41 % m/m

• 0.0141 % m/m

Which of the ions in this equation will form a precipiate?

Pb(NO₃)₂(aq) + Na₂SO₄(aq) →

• Pb⁴⁺ and SO₄^2-

• Pb²⁺ and SO₄^2-

• Na⁺ and NO₃^-

• Pb⁴⁺ and NO₃^-

• There's no precipitate formed, all ions are soluble

Determine the heat capacity of a 70.0 g piece of steel that absorbs 8750.00 J of energy from the sun and changes temperature from 4.50 °C to 64.50 °C

Answer to correct number of significant figures, with no units or symbols (like this 4.1825)

(a)  

Lead(II) iodide forms from the reaction of Pb²⁺(aq) ions and I^-(aq) ions.

What is the formula of lead(II) iodide?

• Pb₂I(s)

• (PbI)₂(s)

• Pb₂I₂(s)

• PbI₂(s)

• There's no precipitate formed, all ions are soluble

Determine the value of the 4 coefficients in this equation once it is balanced

[a] Pb(CH₃COO)₄(aq) + [b] NaI(aq) → [c] PbI₄(s) + [d] NaCH₃COO(aq)

Write your answer as the numbers in order abcd like this: 2134

(a)  

How many atoms are in 100.0 g of 3-amino-2-hydroxypropanoic acid?

• 14

• 0.9524

• 100.0 x 10²³

• 5.735 x 10²³

• 105.0

What is the IUPAC name of this structural formula?

• Hexanoic acid

• Butanoic acid

• Ethyl butanoate

• Butyl ethanoate

• 2-hydroxyhexan-3-al