Given the balanced equation representing a reaction:
f2(g) + h2(g) ==> 2hf(g)
what is the mole ratio of h2(g) to hf(g) in this reaction?
(1) 1: 1 (3) 2: 1
(2) 1: 2 (4) 2: 3

Which formula can be used to calculate the molar mass of hydrogen peroxide

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

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.