Which of the following is an endothermic reaction?

condensation of steam

combustion of methane

the reaction in a cold pack

an explosion

stomach acid contains dilute hydrochloric acid write a chemical equation to show the neutralization of stomach acid by milk of magnesia

When two or more refrigerants are mixed, what must be done with the mixture?

How much work is done if an object moves 4.5 m in has 12 Newtons of force on it

Which list consists of elements that have the most similar chemical properties? (1) Mg, Al, and Si (3) K, Al, and Ni (2) Mg, Ca, and Ba (4) K, Ca, and Ga

Find δh°rxn for the reaction ch4 (g) + 2o2 (g) → co2 (g) + 2h2o (l). [δh°f (ch4 (g)) = - 74.8 kj/mol; δh°f (co2 (g)) = - 393.5 kj/mol; δh°f (h2o (l)) = - 285.5 kj/mol]

Is MgCO3 a correct chemical formula

Water is an exaple of a mixture because it is made up of hydrogen and oxygen atoms bonded together true or false

Chlorine plus lithium bromide

What is the independent and dependent variable of the sentence" you decide to clean the bathroom. You notice that the shower is covered in a strange green slime. You decide to try to get rid of this slime by adding lemon juice.

M=40g V=31cm^3 what is the density