In which of the following ionic compounds are ions with a +1 charge present?
a. Li2Se b. Al2Te3
c. Mg2Si d. SrO

All motion is caused by force? true or false

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.