Which of the following happens during an endothermic chemical change?
a) heat is released.
b) net energy decreases.
c) products have a higher total potential energy than the reactants.
d) products have the same total potential energy as the reactants.

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Select the correct answer from each drop-down menu. describe what happens to a carbon-11 atom when it undergoes positron emission. the decay of a carbon-11 atom _1_, and this causes it to emit _2_.options for 1: > changes a neutron into a proton> changes a proton into a neutron> is hit with a neutron> reconfigures its protons and neutronsoptions for 2: > a negatively charged electron-sized particle> a positively charged election-sized particle> two atoms and several neutrons> two neutrons and two protons

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.