Which of the following processes requires more heat energy? a. raising the temperature of 100.g of water by 10.0 °C
b. raising the temperature of 50. g of water by 10.0 °C?

For the following, determine the type of reaction and then give products.

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.