Is this reaction endothermic or exothermic

d) NH4NO3 (s)  NH4 + (aq) + NO3 - (aq) [Note, this is the reaction that takes place in a cold pack]

The only way to seperate a compound into its elements is by a

Write the electron dot structure of chlorine and calcium

Wich physical property is the best unknown substance

Describe how Electronegativity is related to metallic character of an element

if a sample of ideal gas takes up 5.00 L at 300 K and 1.5 atm, what volume will it Take up at 400 K and 1.5 atm?

What is the atomic mass number of carbon?

How does the size of ions affect the conductivity of a solution?

Chemical equations need to be balanced in order to satisfy the law of a. molecular changes. b. conservation of mass. c. products and reactants.

Why do we not know yet if we live in a 'multiuniverse"?

What is an alloy? (this is for apex chem 2) a. a combination of a metal with another element b. a layering of one metal over another metal c. a metal with a changed oxidation state d. a substitution of one metal for another metal