What are two types of pure substances? what is the difference between the two?

How many moles of co2 are produced when 5.70 mol of ethane are burned in an excess of oxygen

Which of the following correctly identifies two of the eight elements of weather

What is the concentration of a potassium iodate solution after you complete the following porcedure? Pipette 10 mL of a 0.31 M potassium iodate stock solution to a 100-mL volumetric flask and then add water to the mark.

A 43.6 g of iron ore is treated as follows. The iron in the sample is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 11.5 grams. What was the percent iron in the sample of ore? Answer in units of %.

1. Islands in the middle of the oceans (for example, Great Britain, Hawaii, Bermuda) tend to have more stable climates with smaller temperature fluctuations than regions of the same mass surrounded by land (for example, continents).

A solution of bleach has about 1.5 g of NaOCl dissolved in 220 mL of solution. What is the molarity?

Enthalpy is a form of?

1. If 25 grams of carbon dioxide gas is produced in this reaction, how many grams of sodium hydroxide should be produced? NaHCO3 > NaOH + CO2. If 50 grams of sodium hydroxide are produced, what is the percent yield?

G what is the difference between the sidechains of leucine and isoleucine? select one: a. one is charged, the other is not b. one has more h-bond acceptors than the other c.

How many grams of NaOH are needed to make 500 mL of a 2.5 M NaOH solution