Which is NOT unique to each element?

A. proton number

B. atomic number

C. neutron number

D. chemical symbol

A sample of gas in a cylinder is provided with 623.9 kJ of heat. This causes a piston to then compresses the gas by doing 432.9 kJ of work to the gas. What is the change in internal energy of the gas during this compression?

Which of the following statements about ideal conditions for gases is considered FALSE? A. 1 mole of gas occupies 22.4 L at STP. B. 2 moles of gas occupy 22.4 L at STP. C. STP equals 1 atm at 273.15 K. D. STP equals 101.3 kPa at 273.15 K.

Which characteristic of a company suggests that it has an informal work culture

How many moles of cacl2 are in 250 ml of a 3.0 m of cacl2 solution?

Which describes a solution that contains a system at equilibrium? One in which the color of the solution is changing slowly, or one in which the color is not changing. Explain your answer.

What is the example to the word camouflage

Given the reaction 2NaOH + H2SO4 = Na2SO4 + 2H2O, what is the total number of grams of NaOH needed to react completely with 196 grams of H2SO4

The mass flow rate of gasoline leaving a refinery is 1610 kg/min. The specific gravity of a gasoline is 0.700. A retail gasoline pump is able to fill a 20.0 gallon automobile tank in 1.80 minutes.

Calculate the solubility of cux (ksp=[cu2+][x2-]=1.27*10-36) in a solution that is 0.190 m in nacn.

An atom has seven valance electrons which element could have this type of atom