Write the following as a ratio in simplest form: 2 weeks out of 1 year (52 weeks).

A solution of CuSO4 is labelled 0.01 M. How much CuSO4 in grams, must be used to make 1 liter of solution? A) 1.120 g B) 1.595 g C) 1.6 g D) 15.0 g

Explain how atoms (ions) are held together in an ionic bond. Give an example of an ionic compound

What is the maximum number of hydrogen bonds that can be formed in a sample containing 1.0 mol (NÅ molecules) liquid HF? Compare with the maximum number that can form in 1.0 mol liquid water.

What are the chemical components of a dna molecule?

Which is an example of a covalent bond? a. Ions in a bar of pure iron are surrounded by a large number of valence electrons. b. There are less than 16 valence electrons in two chlorine atoms, but they form a stable bond. c.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.

To break a chemical bond, energy must be (1) absorbed (2) destroyed (3) produced (4) released