3. What mass of lead (Pb) is needed to absorb 54,000 calories of energy if its temperature is to increase only by 2.5°C? (c = 0.128 J/g°C)

Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radiating from the nucleus of some atoms beta particle 3. negative particle identical to an electron but radiating from a decaying nucleus alpha particle

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

What is the percentage composition of carbon in the compound ch4