For the equation 2no + o2 → 2no2, how many liters of nitrogen dioxide would be formed from 56 liters of nitrogen monoxide at stp? (assume you have plenty of oxygen)

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

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.)

What are the major types of a chemical compound