Chemistry, 12.12.2019 11:31 calraezaj2020
An unknown substance is heated from 10 °c to 25 °c. the table below shows the state of the substance at different temperatures.
time
(minutes) temperature of liquid
(degrees celsius) state of matter
0 10 solid
2 15 solid
4 17
6 17
8 17
10 23 liquid
12 25 liquid
which statement is correct about the unknown substance?
its melting point is 17 °c.
its melting point is 15 °c.
the substance sublimes at 15 °c.
the substance exists as a gas at 17 °c.
(this is science)
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