Which of the following is an element?

a. carbon monoxide gas (co)

b. magnesium chloride salt (mgcl)

c. hydrochloric acid (hcl)

d. zinc metal (zn)

Five moles of monatomic ideal gas have initial pressure 2.50 * 103 Pa and initial volume 2.10 m3. While undergoing an adiabatic expansion, the gas does 1480 J of work. What is the final pressure of the gas after the expansion?

What is a solution? Are all mixtures solutions? Are all solutions mixtures?

Is a fireplace poker glowing red when placed into fire a chemical or physical change

Magnesium has three isotopes. Magnesium-24 has a percent abundance of 78.99% Magnesium - 26 has a percent abundance of 11.01% What is the percent abundance of mangesium - 25?

What's the difference between direct and indirect methods of flood control?

Which if the following is an example of a stratovolcano?

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers

How many molecules are in. 25 mole of O2