Density is the amount of mass per unit volume. Calculate the density of an object that has a mass of 10 Kg and has a volume of 5 cubic liters. What would be a good answer for this?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

What is the pressure of 0.500 moles of carbon dioxide gas in a 2.5 l tank and at a temperature of 301 k? (r=0.0821 l·atm/mol·k) 3.08 atm 1.2 atm 0.23 atm 4.01 atm 4.94 atm

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