Combustion Analysis Quiz

What should you do if you need an introduction to combustion analysis?

• Read a textbook

• Refer to the first video

• Skip the introduction

• Watch the second video

What is the first step in converting the mass of CO2 to moles?

• Use the molar mass of hydrogen

• Use the molar mass of water

• Use the molar mass of CO2

• Use the molar mass of oxygen

How many moles of hydrogen are obtained from one mole of water?

• One mole

• Two moles

• Four moles

• Three moles

What is the next step after finding the moles of carbon and hydrogen?

• Calculate the mass of oxygen

• Calculate the mass of nitrogen

• Calculate the mass of sulfur

• Calculate the mass of chlorine

How do you find the mass of oxygen in the sample?

• Add the masses of carbon and hydrogen

• Divide the masses of carbon and hydrogen

• Subtract the masses of carbon and hydrogen from the total mass

• Multiply the masses of carbon and hydrogen

What is the purpose of writing a pseudo formula?

• To find the chemical formula

• To find the structural formula

• To find the empirical formula

• To find the molecular formula

What is the general rule for rounding numbers when finding empirical formulas?

• Round to the nearest whole number

• Round to the nearest tenth

• Round to the nearest thousandth

• Round to the nearest hundredth

What should you do if the third element in your compound is not oxygen?

• Ignore the third element

• Add more oxygen

• Use the same method

• Use a different method

What is a key step in ensuring accurate calculations in combustion analysis?

• Writing everything down clearly

• Skipping unnecessary steps

• Using only approximate values

• Ignoring unit conversions

What is the benefit of writing everything down and canceling units?

• It helps in understanding the logic

• It leads to incorrect results

• It makes the process more confusing

• It is unnecessary and time-consuming