Ctivity/4/5/2/assessment
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4.5.2 Test (CST): Computer-Scored Unit Test
Question 20 of 25
2 Points
The products of a reaction are NaCl and H. O. What does the law of
conservation of matter reveal about the reactants in the reaction?

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic

The identities of substances are the same before and after which type of change

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.