A sample of 29.344 g of dinitrogen monoxide reacts with an excess of oxygen to form 61.343 g of dinitrogen tetroxide. According to the Law of Conservation of Mass, the amount of oxygen gas that reacted with the nitrogen-containing gas is: 90.687 g O, 2

47.997 g O2
47.997 g O, 2

31.999 g O, 2

2.090 g O, 2

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

At element makes up all organic compounds?