73. Silicon carbide, an abrasive, is made by the reaction of silicon dioxide with graphite.
SiO2 + 3C SIC + 2CO
If 100 g of SiO2 and 100 g of C are reacted as far as possible,
which one of the following statements will be correct? (Atomic
weight (g/mol): C =12, 0 =16, Si = 28)
A. 111 g of SiO2 will be left over.
B. 44 g of SiO2 will be left over.
C. 82 g of C will be left over.
D. 40 g of C will be left over.

The clouds are grey and ground is wet. a quantitative b qualitative

What is the value of keq for the reaction expressed in scientific notation?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)