450 J of energy is required to raise the temperature of a block of aluminum from 20 °C to 60 °C. Calculate the mass of aluminum present. Specific Heat (J/g•°C) of aluminum is 0.90.

Ethene molecular fórmula= c2h4molecular weight = 29.046g/molhope it : )

4- c, because all matter stays the same no matter what. it is still there. 5- b, because matter is known as mass. 6-c because, flammability is a chemical property. malleability is changing the shape of an object.