The amount of energy required to move an electron from one energy level to the next higher one is known as: A. quantum of energy B. Aufbau principle C. mass number D. atomic number

What is the pressure in a 5.00 L tank with 4.75 moles of oxygen at 39.3 degrees Celsius

Which force holds together an atom's nucleus? a the strong force b the weak force c electromagnetism d gravity?

Convert 45 joules to heat calories

What is the molar mass of CaCL2•2 H2O

Which element is oxidized in the following reaction: CuO (s) + H2 (g) Cu (s) + H2O (l)

How many moles of lithium are in 83 grams of lithium?

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?