At 25°C and 449 mmHg. an unknown pure gas has a density of 0.676 g/L. Which of the following gases could be the unknown gas? O a. Ne O b. Cl20 О с. Clz O d. C3H6 O e. N2

An extended form of the combined gas law can be developed if moles of gas change. In this extended form, only R is constant, so n₁ and n₂ must be included. n₁T₁ T₂ 1 1 22 Based on this gas law, which of the following are correct relationships describing n₁ and n₂? A n ₁ T₁ = ¹₂₁²₂ 1 1 2 (B) E n n 1 2-7 = T T 1 F n P₁"₁=P₂" 2 P₁ P2 == n "₁ ⒸV₁"₁₁=V₂" ₂ V n 1 n 1 == n 2 P₁V₁ P₂V/2 1 1 22 2

What volume is occupied by a 1.38 mol sample of helium gas at a temperature of 0 °C and a pressure of 1 atm?______L

_10. Propane burns in air according to the equation: C3Hs (g) + 502 (g) → 3CO2 (g) + 4H2O (g) what volume of CO2 would be formed if 5.00 L of propane burns, assuming that all of the gases are under the same conditions? A. 5.00 L B. 15.0 L C. 3.00 L D. 4.00 L E. 1.67L 11 What volume of H would be collected at 22.0°C and a pressure of 713 torr if 2 65 g of zinc react