DP Chemistry (last assessment 2024)

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Question 19N.2.sl.TZ0.a(ii)

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.2.sl.TZ0.a(ii)
Level sl Paper 2 Time zone TZ0
Command term Calculate Question number a(ii) Adapted from N/A
a(ii).
[Maximum mark: 1]
19N.2.sl.TZ0.a(ii)

Automobile air bags inflate by a rapid decomposition reaction. One typical compound used is guanidinium nitrate, C(NH2)3NO3, which decomposes very rapidly to form nitrogen, water vapour and carbon.

Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate.

[1]

Markscheme

moles of gas = « 5×10.0 g122.11 g mol−1=» 0.409 «mol» ✔

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