Calculate the mass, in grams, of each sample. a. 1.1 * 1023 gold atoms b. 2.82 * 1022 helium atoms c. 1.8 * 1023 lead atoms d. 7.9 * 1021 uranium atoms

Who developed a way of showing valence electrons?

Write and balance the equation for the combination of ammonia gas with solid copper (II) oxide to produce copper metal, nitrogen gas, and liquid water. What are the states of matter of each element/compound of the equation?

Determine whether each of these reactions occur through an S N 1, S N 2, E1, or E2 mechanism. A. A tertiary alkyl halide is treated with ethanol and heating to give an alkene. A. The mechanism of reaction A is: S N 1 E1 S N 2 E2 B.

Determine the heat energy needed to raise the temperature of 120 grams of ice at - 5 to steam at 115°

The value of the equilibrium constant for the combination of nitrogen and oxygen to make NO is 2 x 10-9.

What is the product of the chemical reaction ... Au+O2

Compare and contrast the compounds CH4 and PH3 in terms of covalent bonding, molecular geometry (shape), and intermolecular forces. Which substance would experience a stronger attraction between its molecules, and why?

How do consumers energy

Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? moles of solute Use molarity - liters of solution

What are 3 ways to seperate metal particles and salt