How do water molecules dissolve a salt?

Why are the halogens less reactive going down the periodic table?

Solid aluminum is placed in a beaker with a blue solution of copper (II) nitrate. The resulting reaction causes the blue solution to turn colorless. The solid aluminum is consumed while a spongy, dark brown solid forms.

Which of the following pollutants is NOT created by fossil fuels? a. sulfur dioxide c. nitrogen dioxide b. phosphodioxide d. carbon dioxide

Define oxidation, reduction, and oxidation number. Describe how oxidation and reduction affect the oxidation number of an element.

1. Which is not an example of a physical change to a wooden stick? A) slicing wood shavings from the stick B) bending the stick back and forth C) burning the stick D) chopping the stick in half

What is the definition of covalent bond?

How many grams of H2O will be produced if 18.1 grams of Fe are produced? Fe3O4 + H2 - Fe + H20 Select one: O a. 7.8 Ob. 75 O c. 17 O d. 1.5

1. Where are the most massive elements found on the periodic table? A at the bottom right B at the top right C at the top left D at the bottom left

Lenny accidentally drops his matchbox car into a graduated cylinder. if the car has a mass of 10 grams and the water level in the cylinder rises from 41 ml to 46 ml. determine the density of the matchbox car. the formula for density is d = m v

When 12.4 grams of KBr are dissolved in enough water to create a 170-gram solution, what is the solution's concentration, expressed as a percent by mass?