DP Chemistry (last assessment 2024)

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Question 18M.3.hl.TZ2.a.v

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Date May 2018 Marks available [Maximum mark: 2] Reference code 18M.3.hl.TZ2.a.v
Level hl Paper 3 Time zone TZ2
Command term Determine Question number a.v Adapted from N/A
a.v.
[Maximum mark: 2]
18M.3.hl.TZ2.a.v

Vanadium forms a body centred cubic (BCC) crystal structure with an edge length of 303 pm, (303 × 10−12 m).

Determine the density, in g cm−3, of vanadium by using your answers to (a)(i), (a)(iii) and (a)(iv).

[2]

Markscheme

«8.46 × 10–23 g × 2 =» 1.69 × 10–22 «g»

d = « 1.69 × 10 − 22  g 2.78 × 10 − 23  c m 3 = » 6.08 «g cm–3»

 

Accept any value in the range 6.07–6.09 «g cm–3».

Award [2] for correct final answer.

[2 marks]

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