CAN SOMEONE HELP ME PLZ AND THANKS WILL MARK U AS BRAINLIEST

Explanation:

2.

First, we need to find the number of moles of at 300K and 1.5 atm using the ideal gas law:

Now use the molar ratios to find the number of moles of ethane to produce this much .

Finally, convert this amount to grams using its molar mass:

3.

Convert 75 g Zn into moles:

Then use the molar ratios to find the amount of H2 produced.

Now use the ideal gas law to find the volume of H2 produced at 23°C and 4 atm: