a 1kg rock is at a height of 100 meters. What is the rocks gravitational potential energy at 100 meters high

Why does an atom become negative when it gains an electron?

You need to make 500.0 mL of a 2.2 M solution of K SO, How many grams of K SO, do you need?

The enthalpies of formation of the compounds in the combustion of methane, CH4 (9) + 20, (g) → C02 (g) + 2H2O (g), are CH4 (g) : AH = - 74.6 kJ/mol; CO2 (g) : AH + = - 393.5 kJ/mol; and H2O (g) : AHp = - 241.82 kJ/mol.

How would you write and name the ions for tin?

What is the evidence of a chemical reaction when the fireworks go off

The earth names for the 30 alien elements in order of atomic number

Worth 30 pts. Liquid vinegar and solid baking soda chemically react to form solid sodium acetate, liquid water, and carbon dioxide gas.

The electron configurations of two unknown elements X and Y are shown. X: 1s22s22p6 Y: 1s22s22p63s23p6 Which statement is most likely correct about the two elements?

Which is the best example of a closed system

Determine the number of atoms in 2.50 mol zn