An 18.7 g sample of platinum metal increases in temperature by 3.3 °C when 5.7 J of heat are added. What is the specific heat of the platinum?

What is the relation between concentration of reactants and the rate of chemical reaction?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease