Is evaporation/condensation a physical or chemical change? Explain

if a television with mass 15kg is lifted to a shelf of height 1.2m, how much gravitational potential energy is added to the television

The chemical properties of an element are largely determined by its a. number of energy levels. b. period number. c. number of protons. d. number of valence electrons.

A current of 0.44 A is passed through a solution of a ruthenium nitrate salt, causing reduction of the metal ion to the metal. After 25.0 minutes, 0.345 g of Ru (s) has been deposited. What is the oxidation state of ruthenium in the nitrate salt?

Weather ionic or covalent, what does bonding always involve?

The vapor pressure of pure water at 110 °C is 1070 torr. A solution of ethylene glycol and water has a vapor pressure of 1.00 atm at 110 °C. Assuming that Raoult's law is obeyed, what is the mole fraction of ethylene glycol in the solution? g

Is MgCO3 a correct chemical formula

Water is an exaple of a mixture because it is made up of hydrogen and oxygen atoms bonded together true or false

Chlorine plus lithium bromide

What is the independent and dependent variable of the sentence" you decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemon juice.

M=40g V=31cm^3 what is the density