100g of calcium carbonate was heated until it decomposed to give calcium oxide and carbon dioxide. 56g of calcium oxide was left. Work out the mass of carbon dioxide given off.

How do you use pedigrees to determine and explain the inheritance of traits?

Which things are abiotic factors that are also basic needs for which living things compete?

If you have a volume of 10 mL and a mass of 100 kg, what is the density?

Matter is niether created nor destroyed in any chemical change. Is this a theory or a law?

Similarities about the inner and outer planets

Iron is an important element in human body cells. If iron has an atomic number of 26, what does this tell you about this element?

Select all that apply. A scientific law: A - is generally accepted as true B - has never been found to be in error C - has no known contradictions D - must be reverified occasionally

A volume of 125 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.

The volume of a gas is reduced from 4 l to 0.5 l while the temperature is held constant. what does the pressure of the gas do?

In an experiment, an unknown gas effuses at one-half the speed of oxygen gas, which has a molar mass of 32 g/mol. which might be the unknown gas?