Mu Cephei is no longer considered a main sequnce star. This means it has run out of: A:hydrogen
B:Helium
C:Oxygen
D:Iron

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g

Determine type of reaction & predict the product c3h12+o2 =