Which descriptions did you include in your response? Check all of the boxes that apply.
O Ammonia gas reacts with oxygen gas.
O Nitric oxide gas and liquid water are
produced.
Platinum is used as a catalyst.
The equation is unbalanced because the
number of hydrogen atoms is not the same on
both sides of the equation.
O

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

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.)