2. Solve the following numerical problems involving data analysis: (a) 1.3 g of zinc powder is mixed with excess
dilute nitric acid. 480 cm of hydrogen gas is
collected in 10 s. Calculate the average rate
of reaction for the whole reaction in cm3s-
Time (s)
(b) The volume of oxygen gas released from
a mixture of hydrogen peroxide solution
0
and manganese(IV) oxide powder is
30
recorded at intervals of 30 seconds for
270 seconds in Table 4.1.
60
() Based on Table 4.1, draw a graph of
90
volume of oxygen gas against time.
(ii) Calculate the average rate of reaction:
120
• for the first 2 minutes
150
• in the second minute
• for the whole reaction
180
(ii) Calculate the rate of reaction:
210
• at the 60th second
240
• at the 150th second
• at the 240th second
270
28.50
33.00
36.50
39.00
40.00
40.00
40.00​

What is the number of moles in 15.0 g ash3?

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.

How many grams of ammonia would be produced by the decomposition of 16.93 mlof hydrazine? (the density of hydrazine is 1.021g/ml)