How many valence electrons are in an atom with the electron configuration in example A? Example A: 1s22s22p63s23p64s1 7 1 6 19

Explain the term dipole moment and describe briefly its experimental determination.

Why is an apple solid?

which pattern is a characteristic of a graph of exponential growth A straight line B rises sharply on the right C A shape D rises sharply on the left

Consider the following reaction: NH4HS (s) ⇌NH3 (g) + H2S (g) An equilibrium mixture of this reaction at a certain temperature was found to have [NH3] = 0.276 M and [H2S] = 0.370 M.

What do effective problem-solving strategies have in common?

5.00 L of a gas is collected at 100K and then allowed to expand to 20.0 L. What must the new temperature be in order to maintain the same pressure? A. 400 °C B. 127 °C C. 223 °C D. 627°C

Before the initial explosion was the matter hot or cold

Which of the following atoms has seven valence electrons? chlorine (Cl) nitrogen (N) manganese (Mn) oxygen (O)

A.) During an experiment, a student adds 2.90 g of CaO to 400.0 mL of 1.500 M HCl. The student observes a temperature increase of 6.00 °C. Assuming the solution/'s final volume is 400.0 mL, the density if 1.00 g/mL, and the heat capacity is 4.

Consider the ionic compound magnesium acetate. How many electrons does the magnesium ion have