Which element is present in every organic compound?

(1) carbon (3) nitrogen

(2) fluorine (4) oxygen

A gas with a volume of 4.0 liters at a pressure of 205 kilopascals is allowed to expand to a volume of 12.0 liters. What will the pressure in the container be if the temperature remains constant?

In a solution composed of benzene and toluene that has a vapor pressure of 32 torr at 20°C, what is the mole fraction of benzene?

The product obtained by cracking an alkane X are methane ethene and propene. The mole fraction of ethene in the product is 0.5. What is the identity of X?

A chemist designs a galvanic cell that uses these two half-reactions: half-reaction standard reduction potential (s) (aq) (aq) (l) (aq) (aq) Answer the following questions about this cell.

Which of the following equations can be used to calculate pOH?

Calculate the number of moles of 2 g hydrogen gas

Copper and silver are examples that will form what bond

How many moles of barium hydroxide, Ba (OH2), would be required to react with 117 g hydrogen bromide, HBr?

Which carbon compound is soft, slippery, a decent electricity conductor, and bonded in a way that forms planes? coal petroleum graphite

Which of the following describes chemical properties