Mole Diagram, KMT, and Avogadro's Hypothesis Form

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1. Knowing that these sealed flasks have the same conditions (273K and 1.0 atm), which of the following quantities are the same for each gas? *

a) the number of atoms

b) the number of grams

c) the number of molecules

d) the density

e) None of the choices are correct

2. How many moles of Ar are in the 10.0 L flask?

a) 0.446 moles

b) 2.24 moles

c) 1.0 moles

d) .227 moles

e) None of the choices above are correct

3. How many molecules of N₂ are in the 10.0 L flask? *

a) 6.02 x 10²⁴

b) 6.02 x 10²³

c) 2.68 x 10²³

d) 2.15 x 10²³

e) None of the choices above are correct

4. Which sample of matter listed below has same number of molecules as the 10.0 L of Ar? *

a) 20 liters of Ne at 1.0 atm and 273 K

b) 15 liters of H₂O at 1.0 atm and 273 K

c) 10 liters of O₂ at 2.0 atm and 273 K

d) 10 liters of Cl₂ at 1.0 atm and 546 K

e) None of the choices above are correct

5. Given the following conditions below, which quantity must be the same for each gas? *

a) the number of atoms

b) the volume

c) the number of grams

d) the density

e) None of the choices above are correct

6. How many moles of Cl₂ are there from the data below? *

a) 0.25 moles

b) 1.5 x 10²³ moles

c) 1.0 moles

d) 4.01 moles

e) None of the choices above are correct

7. What volume of NO₂(g) at STP would result from 120. grams? *

a) 22.4 L

b) 5.36 L

c) 8.59 L

d) 2.05 L

e) 58.4 L

8. Which sample of matter listed below has same number of molecules as 10.0 L of Ar at STP? *

a) 20 liters of Ne at 1.0 atm and 273 K

b) 15 liters of H₂O at 1.0 atm and 273 K

c) 5 liters of O₂ at 2.0 atm and 273 K

d) 10 liters of Cl₂ at 1.0 atm and 546 K

e) None of the choices above are correct

9. Which of the following gases are the most Ideal?

a) NO₂

b) Cl₂

c) O₂

d) CH₂

e) H₂S

10. Which of the following is not a requirement for gases to act Ideally *

a) They must have molecular attractions

b) They have insignificant volume

c) They are random and move in a straight line motion

d) They have elastic collisions

e) None of the Choices above are correct.

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