Consider the following intermediate chemical equations. ch4(g) + 2o2(g) → co2(g) + 2h2o(g) 2h2o(g) → 2h2o(1) which overall chemical equation is obtained by combining these intermediate equations? ch4(g)+2o2(g) → co2(g) + 2h2o(1) ch4(g) +202(g) → co2(g) + 2h2o(g) ch4(g) + 2o2(g) → co2(g) + 4h2o(g) + 2h2o(1) ch4(g) + 2o2(g) → co2(g) + 6h2o(g)

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.