Look at the four chemical reactions.
reaction 1: nh4oh - nh3 + h20
reaction 2: 2naci 2na + cl2
reaction 3: cao + h20 - ca(oh)2
reaction 4: 2kcio33 - 2kci + 302
which statement identifies the reaction that is different from the rest and explains correctly why it is different?
reaction 3, because a single ion is replaced in a compound
reaction 3, because a single product is synthesized
reaction 4. because two products are synthesized
reaction 4. because two ions are interchanged

The answer is Reaction 3 because a single product is synthesized or B

Explanation:

I just took the test and it was right

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)