If an object has a mass of 20 kg, what is the force of gravity acting on it on earth? a. 196 n b. 32.67 n end of exam c. 1.96 kg d. 2.04 kg

Water (2510 g ) is heated until it just begins to boil. if the water absorbs 5.09×105 j of heat in the process, what was the initial temperature of the water?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

According to coulomb's law, how would the electrical force between particles change if the product of their electrical charge increased?