Chemistry Test With Answer Key - Regents High School Examination, The University Of The State Of New York, 2016 Page 28
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3379 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
The ratio by mass of NH
Cl to H
O in mixture A is 40. g/100. g, and the ratio in mixture B is
4
2
10. g/100. g.
Both mixtures have the same total mass, but have different amounts of sand.
Mixture B has more sand.
The mixtures have different proportions of NH
Cl.
4
80 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
heterogeneous
nonuniform mixture
81 [1] Allow 1 credit for any value from 23ºC to 26ºC, inclusive.
82 [1] Allow 1 credit. Acceptable responses include, but are not limited to:
Sand is insoluble in water.
Sand particles are too large to pass through filter paper.
Sand is more dense than NH
Cl(aq).
4
Sand remains a solid in the mixture.
[8]
P.S./Chem. Rating Guide–Jan. ’16
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