Determining the amount of heat required to raise the temperature of a substance.

Liquid methanol has a heat capacity of 81.6 J/(K mol). How much heat is required to raise the temperature of 20.0 g of liquid methanol from 25 C to 40.0 C?

Predicting soluability reactions

Attached you will find a table listing the chemicals I will be mixing in lab next week. I would like to know the reactions between the solutions. Once I have these reactions in a table, I will be able to mix unknown solutions, and identify the unknowns based on the table I will have in advance. I will only pay for a response that fills in the parts of the table I still have blank. I have attached the table including the reactions I have identified to date.I will will balance the new equations and write the the new products. For example, HCl+ AgNo3-> AgCl. I just need the predicted reactions. Below is the abbreviations I have started with. The table is attached NR = No Reaction Yel ppt= Yel... click for more

Mass and mole stoichiometry question at STP.

The purity of a 0.248 gram sample containing Zn is determined by measuring the amount of hydrogen gas formed when the sample reacts with hydrochloric acid. The sample is found to be 91.7% Zn. What volume of hydrogen gas in liters was collected at STP?

Writing the names of chemical compounds.

What is the chemical name of NH Br ?      4

Equilibrium Constants

-Determine the Value for the equilibrium constant if there are present at equilibium 5.0mol of Nitrogen, 7.0 mol Oxygen, and 0.10 mol NO2 in a 1.5 L vessel. N2 + O2 --> 2NO2 -Determine the value for the equilibrium constant for the reaction A+ B --> 2C, if 1.0 mol A, 1.4 mol B, and 0.50 mol C are places in a 1.0 L vessel and allowed to come to equilibrium. The final concentration of C is 0.75M.