Question 8 Which of the following observations is the best evidence that unknown liquid X is composed of only one pure substance?
A Liquid X forms a solid when added to hydrochloric acid.
B
Liquid X boils away completely at a single temperature.
С
Liquid X appears clear and uniform throughout
D
Liquid X can be easily dissolved in water.
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Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)