What is an indication a chemical reaction has occurred?

A.) Formation of gas

B.) Boiling of a substance

C.) Melting of a substance

D.) Freezing of a substance

Part D When the coffee is brewed according to directions, a pound of coffee beans yields 50 cups of coffee (4 cups = 1 qt). How many kg of coffee are required to produce 250 cups of coffee? Express your answer using one significant figure.

Calculate the number of moles 41.0 g of Ca (NO3) 2 1.48 g of Ca (OH) 2 3.40 g of CaSO4

An atom with 82 protons, 125 neutrons and 78 electrons will have a mass number of

Lakes that have been acidified by acid rain can be neutralized by limiting the addition of limestone how much limestone is required to completely neutralize a 4.3 billion liter lake with a ph of 5.5

Which produces barium-137 when it undergoes gamma decay? A. Cesium-137 B. Cesium-138 C. Barium-137 D. Barium-138

How do the compounds that cause acid rain spread from their source?

Which element is used to "paint" the skin to prevent infection from cuts and scratches

A homogeneous mixture in which one substance is dissolved in another substance is known as a (n)

Determine the mass of 1.68*10^ 35 atoms of neon gas

What is the molar mass of Sr (OH) 2