Eliana cuts a watermelon into several slices. Which statement best describes the physical change? The arrangement of particles within the watermelon changed.
The atoms that make up the watermelon were broken apart.
The total mass of the watermelon changed.

What is happening when the water inside a kettle heats up and begins to boil

What is the work done by the electric force to move a 1 c charge from a to b?

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?