Which of the following involve endothermic reactions? (select all that apply)

A. A chemical cold pack

B. Gasoline in a car engine

C. Cooking rice

D. A candle flame

How do I convert 12 g into kg in a formula

The label on a tub of margarine states that 100 g of the margarine contains 0·70 g of sodium. The sodium is present as sodium chloride. Calculate the mass of sodium chloride, in grams, present in a 10 g portion of the margarine.

What is the smallest metal atom size with p electrons?

Platinum is used to catalyze the hydrogenation of ethylene: H2 (g) + CH2CH2 (g) - ⟶Pt (s) CH3CH3 (g) H2 (g) + CH2CH2 (g) - ⟶Pt (s) CH3CH3 (g) Chlorofluorocarbons (CFCs) catalyze the conversion of ozone (O3O3) to oxygen gas (O2O2) : 2O3 (g) - ⟶CFC

A weather balloon contains 8.80 moles of helium at a ppressure of 0.992 atm and a temperature os 25 C at ground level. What is the volume of the balloon under these conditions?

The ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. in the first step of the ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water.

Convert 6.766 * 10 ms into s

How much CO2 is produced from 10g of CH4?

Two components combine to create a binary ionic compound. Name one of them

True or false. The synthesis of giant molecules from components of repeating units is polymerization.