How long will it take for half of Bismuth-214 to decay to lead? (Refer to the Uranium-238 decay chain series.)

5 min

13 min

20 min

27 min

If gas is moved from a large container to a small container but it's temperature and number of miles remain the same, what would happen to the pressure of the gas?

Why do living things need oxygen

What is the balanced chemical equation for the reaction between iron (II) oxide and hydrogen gas that produces metallic hydrogen and water

What mass, in grams, of chlorine gas (Cl2) is contained in a 12.5-liter tank at 27.0 degrees Celsius and 2.85 atmospheres? Show all of the work used to solve this problem.

Alkanes are hydrocarbons containing only single bonds. Acyclic alkanes have carbon atoms arranged in chains, whereas cycloalkanes have carbon atoms arranged in one or more rings.

Which statement is true about inorganic compounds? A. They are not made of atoms. B. They contain carbon. C. They are not made from living things. D. They are all elements.

Which domain do you find the most interesting why

Complete the matching exercise below by choosing the correct description of each bond type in aqueous solution. 1. covalent bond 2. hydrogen bond 3. electrons shared by atoms a. electrons shared by atoms b.

One mole of calcium ions has the same number of representative particles as which of the following? one mole of calcium nuclei one mole of calcium atoms 6.02 x 1023 calcium ions All of these are correct.

How is chemical symbol and chemical formula difference?