Based upon location in the periodic table, the formula for beryllium (Be) chloride (Cl) is:

a Be2Cl

b Be2Cl3

c BeCl2

d Be3Cl4

What is the enthalpy change during the process in which 100.0 g of water at 50.0 °C is cooled to ice at - 30.0 °C? (Use the specific heats and enthalpies for phase changes)

A gas is allowed to expand, at constant temperature, from a volume of 1.0 L to 10.1 L against an external pressure of 0.50 atm. If the gas absorbs 250 J of heat from the surroundings, what are the values of q, w, and a 9 AU

Which sample of water contains particles having the highest kinetic energy A 25 ml of water at 95c B 45 ml of water at 75c C 75 ml of water at 75c D 95 ml of water at 25 c

The number 80 in the name bromine-80 represents a. the mass number. b. the sum of protons and electrons. c. the atomic number. d. none of the above.

What defines the mass number of an isotope

Which observation provided Albert Einstein the clue that he needed to explain the photoelectric effect

Which of the followings represents a negatively charged ion

Why do you think plant fossils are less common than body fossils?

Why are valence electrons important?

A woman carriers her 100-newton child for a distance of 50 meters to the child's bedroom. How much work does the woman do?