A student performs a chemical reaction with vinegar and an antacid tablet. Experimental results are displayed in the table
below.
Before Chemical Reaction
Mass of Vinegar (9)
Mass of Antacid Tablet (g)
75.83
1264
After Chemical Reaction
Mass of Chemical Reaction (kg)
ODBB7
1 Explain how this chemical reaction represents the law of conservation of matter.
The mass

Question 6. 6. In a reaction between vinegar and antacid tablets, the antacid is the limiting reagent. At constant pressure and temperature, three tablets produce 600 cm3 of gas. What volume will two tablets produce?

(Points : 3)

400 cm3

600 cm3

800 cm3

1,200 cm3****

Question 7. 7. You breathe in 3.0 L of pure oxygen at 298 K and 1,000 kPa. How many moles of oxygen did you take in? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)

(Points : 3)

0.05 moles

1.21 moles*****

2.42 moles

20.0 moles

Question 8. 8. Consider a gas at STP in a container of 22.4 L. If you apply the ideal gas law, what is the approximate value of n?

(Points : 3)

0.5

8.31

224****

1

Question 9. 9. Water boils at 100°C. What is that temperature on the Kelvin scale?

(Points : 3)

213 K

325 K****

333 K

373 K

Question 10. 10. The average speeds of gas molecules in cylinders A, B, C, and D are 0.001 m/s, 0.05 m/s, 0.1 m/s, and 0.5 m/s, respectively. Which cylinder contains gas that is closest to absolute zero?

(Points : 3)

A

B

C******

D

I suck at chemistry