When calcium carbonate is heated strongly, it forms calcium oxide and carbon dioxide. what mass of calcium carbonate is needed to make 50.0 g of calcium oxide?

How do carbohydrates relate to organic chemistry

Which value gives the number of particles in 1 mol of a substance? 6.02 x 1021 6.02 x 1022 6.02 x 1023 6.02 x 1024

An atom has 16 protons and 16 neutrons. Which of the following could be the symbol for that atom, including its mass numbe? Consult the periodic table. A. 35CL B. 32S C. 32Cl D. 35S

Which statement is true of metals? Select one: a. They have characteristics of both metals and nonmetals. b. Many are gases at room temperature. c. They have low conductivity. d. There are more metals than nonmetals.

A researcher recorder that a chemical reaction require 2.90 gal water and raised the temperature of the reaction vessel by 57°F. Convert the researchers volume measurement to the SI unit of liters. There are 3.75 L in 1 gallon A. 8.9 L B. 9.11 L C.

Why does the chair in which you are currently sitting retain its same shape over time? Question options: The particles of the chair are strongly held together. The chair is lower in energy than the surrounding environment.

Which of the following is not a benefit provided by a social group A. instinct to run from predators B. access to mates C. protecting young D. learning to recognize predators

Why must an air traffic controller know a plane's velocity

Compare and contrast the two kinds of chemical bonds (ionic and covalent)

If a thin and a thick wire are otherwise identical, what property is lower for the thicker wire? 1. current 2. static charge 3. resistance 4. voltage