Chemistry Sem2 Final Exam Review

An experiment is performed that creates a compound that contains only carbon and hydrogen. The compound is analyzed and found to be made up of 79.84% carbon and 20.16% hydrogen. what is the empirical formula of this compound?

Tags

NGSS.MS-PS1-1

• 2 KCl(s) + Pb(NO3)2(aq) → PbI2(aq) + 2 KNO3(s)
• KCl(aq) + Pb(NO3)2(s) → PbI2(aq) + KNO3(aq)
• KCl(aq) + Pb(NO3)2(aq) → PbI2(s) + KNO3(s)
• 2 KCl(aq) + Pb(NO3)2(aq) → PbI2(s) + 2 KNO3(aq)

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

• Magnesium (Mg)
• Carbon Dioxide (CO2)
• Oxygen (O2)
• Magnesium Oxide (MgO)

Tags

NGSS.MS-PS1-5

• 120.9 g
• 105 g

• 150.0 g
• 100.5 g

Tags

NGSS.MS-PS1-5

• 30 g
• 15 g
• 48.1 g
• 6.1 g

Tags

NGSS.MS-PS1-5

A lab procedure calls for the use of 0.725 L of 4.295 M copper (III) nitrate. How many grams of copper (III) nitrate are required to make this solution?

• 777 g

• 600.20 g
• 300.50 g
• 450.75 g

• 5.25
• 2.10
• 7.00
• 4.51

At STP conditions, 10.2 grams of chlorine gas would occupy what volume? (HInt: recall the volume that one mole of gas occupies at STP)

• 2.50 liters
• 3.23 liters
• 5.00 liters
• 1.00 liters

Which compound shows the greatest increase in solubility with increasing temperature?

• NaCl
• KCl

Tags

NGSS.MS-PS1-4

What is the solubility of sodium nitrate in 100 grams of water at a temperature of 50^o C?

• 50 grams
• 75 grams
• 110 grams
• 115 grams