Eukaryotic cells of plants and animals differ from prokaryotic cells in that eukaryotic cells have a

cell wall.

cell membrane

vacuole

nucleus

What is another name for the representative elements? a. group a elements b. group b elements c. group c elements d. transition elements

1. Given the specific heat of lead is 0.129 J/g. C and that it takes 93.4J of energy to heat a sample of lead from 22.3°C to 40.4°C find the mass of the lead. m=

64.0 grams of Sulfur Dioxide absorbed 5.00 kJ of heat and immediately evaporated. With this information, calculate its molar enthalpy of vaporization in units kJ/mol.

Calculate the mass of 4.50 moles of Ca3 (PO3) 4

A chemistry student at a yard sale considers buying a silver coin. The student asks permission to test the coin to determine whether it is pure silver. They find that the coin has a mass of 15.79g. Submerging the coin in 12.

Co (g) + h2o (g) ⇌co2 (g) + h2 (g) kp=0.0611 at 2000 k a reaction mixture initially contains a co partial pressure of 1320 torr and a h2o partial pressure of 1760 torr at 2000 k. calculate the equilibrium partial pressure of co2.

Why does water dissolve sugar? Explain your answer!

A solution is prepared by mixing 20.0 g of NaNO3 with 100. mL of water. What is the percentage mass of the solution?

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone.

Q. who developed orbit model of the atom? A. Neils Bohr