Is 2na + cl --> 2 nacl a balanced chemical equation? is it obeying the law of conservation of matter?

No it is not balanced. It has more CI on the product side that the reactant side.

Hope I helped

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

i really dont know but i will try okay.

so i think u would just add all them up and get your answer..