A 752 g sample of iron ore is heated with excess carbon to form pure iron and carbon dioxide. The ore contains iron (III) oxide and other impurities. 453 g of pure iron are obtained from this sample. a. What is the mass percent of iron (III) oxide in the ore? Assume that iron(III) oxide is the only source of iron in the ore and the reaction is 100 % efficient. b. What is the volume of carbon dioxide at 25 oC and 95.0 KPa produced in this reaction.

Which of the following points of the Kinetic Molecular Theory is not always valid? A. gas particles move in rapid, random, straight-line motion. B. there is no attraction between molecules. C. Temperature is a function of the average kinetic energy. D. All of the answers listed are ALWAYS valid under Kinetic Molecular Theory rules. Cop

1. What is the volume of 130 g of oxygen gas at STP? Oxygen has a molar mass of 32 g/mol. 2. What is the volume of 4 moles of N2 at STP?

One of the Discussion Questions in the "Properties of Gases" experiment was about "the bends" or decompression sickness. Select an experiment that illustrated the phenomenon and identify the gas law that explains it. Henry's Law Pulling a vacuum on the balloon in the flask. Placing a balloon in a dewar of liquid nitrogen. Boyle's Law Gay-Lussac's Law Preparing carbon dioxide & the behavior of dry ice. Pulling a vacuum on a sample of seltzer water. Charles' Law

A 22.1 mL sample of H2 gas was collected from an experiment at 1.059 atm and 23.5 °C. How many moles of gas are in this sample?

6. The ideal gas law is a very simple mathematical relationship that relates several physical properties of a gas. This law is only valid when the behavior of a gas is idealized according to three principal assumptions. (i) State the three assumptions made about an ideal gas, and for each assumption (ii) explain which physical property of a gas would be affected if that assumption was not made.

Charles' Law is an empirical gas law relationship that describes O a. the direct proportionality between V and T O b. the inverse proportionality between V and T C. the inverse proportionality between P and T d. the direct proportionality between P and T

A student is experimenting with gases. She finds that 0.13 mol of hydrogen gas (H2) has a volume of 4.8 L. She wants to measure the volume of 0.053 mol of oxygen gas (O2). What volume should she expect the oxygen gas to have? (Use the equation for Avogadro's law.)

Potassium reacts with water to release hydrogen gas according to the following equation 2K(s) + 2H2O(L) > 2KOH(aq) + H2(g) What mass of potassium is needed to produce 50 L of H2 at SATP a. 158 g b. 79 g c. 316 g d. 950 g

A flask at room temperature contains exactly the same amounts in terms of O2 and Neon. If a small hole were opened in the flask, which gas would effuse more quickly? A. It is the same. B. Neon C. O2