Assume you put 200g of ice in the bag and 7% of it melted when you mixed it with salt. How much heat did it take to melt this much ice? If anyone could please help?

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot? question 7 options: the heat from the hot water is conducted through the spoon handle the hot water heats the air surrounding the upper part of the spoon. the hot water causes a physical change in the spoon handle. the hot water causes a chemical reaction to take place in the spoon.

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million