What is a crystal?

a. a type of rock

b. the smallest unit of an element

c. an artificial, decorative substance

d. a solid made of atoms arranged in an orderly fashion

How can something with different atoms be a pure substance and not a mixture?

A container is filled with a mixture of gases: O2, which has a pressure of 1.0 atm. N2, which has a pressure of 0.75 atm, And Cl2 at some unknown pressure. If the total pressure in the container is 3.30 atm, what is the pressure of Cl2?

Hydrogen sulfide, H2S (molar mass 34 g/mol), which smells like rotten eggs, and hydrogen cyanide HCN (molar mass 27 g/mol), which smells like bitter almonds. Both gases are poisonous.

The complete combustion of ethanol, c2h50h (fw = 46.0 g/mol), proceeds as follows: c2h50h (l) + 3 02 (g) - --→ 2 c02 (g) + 3 h20 (l) llh = - 555 kj what is the enthalpy change for combustion of 4.0 moles of c2h50h?

What property of an atom determines its general reactivity

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.

The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?

What is difference between tempering and aging?