26. For each of the following balanced equations, calculate how many grams of each product would be pro- duced by complete reaction of 15.0 g of the reactant
indicated in boldface.
a. 2BC13(s) + 3H2(3) → 2B(s) + 6HCl(3)
b. 2Cu2S(s) + 302(g) → 2Cu2O(s) + 2802(g)
c. 2Cu2O(s) + Cu2S(s) + 6Cu(s) + SO2(8)
d. CaCO3(s) + SiO2() → CaSiO3(s) + CO2(3)

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

When the water vapor cools it condenses select a number that represents his process on the

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.