Calcium carbonate decomposes on heating to form calcium oxide and carbon dioxide. If 0.5g of calcium carbonate is heated in this way.

a) What mass of calcium oxide is formed

b) The mass and volume of carbon dioxide formed at RTP

Which statement about gases is true? A. They are made up of particles that always move very slowly. B. They are made up of particles that travel in a curved path when in motion. C.

30. Ionic compounds have very strong bonds and the compounds are often in crystal structures. True or false?

How many atoms are there in 1.00 mole of KNO3? a. 1 atom b. 3.01 x 10^24 atoms c. 6.022 x 10^23 atoms d. 5 atoms

Calculate the volume of a gas with a pressure of 100 kPa, if its volume at 120 kPa is 1.50 L.

Why is haemoglobin a pure substance

Is it true that the overall charge of a formula unit for a compound is never zero?

What is a significant ethical dilemma that a drug designer may face? A. A new drug effectively treats skin cancer but may cause minor skin rashes during treatment B. A new drug effectively fights allergies but causes drowsiness. C.

Which part of the factory is most similar to the nucleus of a living cell

When an ionic compound is named or its formula is written, what sort of element is placed first? What is the charge on its ions?

A larger glass has 100 mL of a liquid and a smaller glass has 50 mL of a liquid. Which glass of liquid would have more energy? Calculations must be done first because energy depends on both temperature and mass.