Question

Instructions: Work in groups of up to four (4). Clearly print your first and last name and put your answers on this sheet. You must show your work. Turn in only one (1) sheet per Question 1... On December 21, 1968 Apollo 8 was launched into space from Cape Kennedy hed into space from Cape Kennedy aboard a Saturn V booster rocket powered by 810 700 L of RP-1 fuel. Assuming RP-1 is pure decane (Ciol 22) density of 808 kg/m", how many moles of CH2 were consumed during the launch Question 2. Each household in Wisconsin uses about 703 KWH of electricity per month. A KWH is equivalent to 3.6 MJ of energy. a. How much electrical energy, in J, does the average household in Wisconsin use each year? b. The earth receives energy from the sun at a rate of about 1.75 x 10" J/s. How long, in ns. does it take for the sun to provide the earth with the average Wisconsin yearly electrical energy usage?

Answer 1

Question-1

Given that the Saturn V booster rocket is powered by 810700 L of pure decane

Given that density of pure decane is 808 kg/m³

1 m³ volume occupies 1000 L of solution

Hence the density of decane can also be written as 808 kg / 1000 L

This means

1000 L volume of decane solution contains 808 kg of decane

then 810700 L volume of decane solution contains

810700 x 808 /1000 = 655045.6 kgs = 655045600 grams ( 1 kg = 1000 grams)

We have the molar mass of decane = 142.29 g/mol

We can calculate the number of moles from the formula

No. of moles = Weight / Molar mass

Therefore number of moles of decane = 655045600 / 142.29 = 4603595.474 moles

Thus the required number of moles of decane present in 810700 L of pure decane is 4603595.474 moles