A solution is made by dissolving 70.0 grams of KNO3(s) in 100. grams of water at 50.00 and standard pressure. Calculate the percent by mass of KNO3 In the solution.
A) 0.41%
B) 41.2%
C) 70.0%
D) 0.70%

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.

How is an endothermic reaction identified

Alab technician needs to create 570.0 milliliters of a 2.00 m solution of magnesium chloride (mgcl2). to make this solution, how many grams of magnesium chloride does the technician need? refer to the periodic table for . express your answer to three significant figures.