When i googled how to balance this chemical equation k2cro4+nahso3+h2o=nahso4+koh+cr(oh) 3 they gave me the balanced form of 2k2cro4+3nahso3+5h2o=3nahso4+4koh+2 cr(oh)3. but i don't know how to get this because to me it would seem unbalanced.

Is this correct if not can u correct me

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction

How does science use models to gain a better understanding of concepts?