A chemist found a 60.00 gram sample containing copper and oxygen. Given the following percent composition, what is the mass of copper in the sample? (57% Cu, 43% O) A: 0.5708 g Cu
B: 25.02 g Cu
C: 34.25 g Cu
D: 63.5 g Cu

Suppose you have designed a new thermometer called the x thermometer. on the x scale the boiling point of water is 129 ? x and the freezing point of water is 13 ? x. part a at what temperature are the readings on the fahrenheit and x thermometers the same?

Which of the following are correct values for the ideal gas laws constant r

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.