A sample of aluminum (c = 0.900 J/gºC) is heated from 20.8°C to 38.7 °C using 3,750 ) of energy. What is the mass of the aluminum sample?

On a distance vs time graph the line of an object at rest is a

Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction