An experiment to investigate the reactivity of zinc, a piece dropped into a test tube containing
facid. The experimental set-up
experimental set-up is illustrated below.
dilute hydrochloric
MOO
Dilute hydrochloric aad.
Bubbles
Zinc
o Write a balanced equation for the reaction that occurred in the
experiment
1) Name the
gas evolved​

The electromagnetic force acts between what

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

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.