(10 points) 2. The five boxes below represent a geologic cross-cut with five layers (A is on top and E is on
Score
the bottom). The types of rocks are listed on the right side. In each box, write the appropriate
type of rock and explain the answer in relation to the history of the earth's atmosphere.
Answs
A
Limestone layers
|Banded-iron formations
R
Metamorphic rocks with fine grains
Red beds
Chert layersl

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?