General Chemistry Answers

Find the mass in grams of 2.00×1023 molecules of F2

What volume in mL of 0.3000 M NaCl solution is required to produce 0.2250 moles of NaCl?

Is top water in the urban parish harder than that of the rural parish?

A mixture of argon and xenon gases, in a 8.85 L flask at 44 °C, contains 17.9 grams of argon and 22.6 grams of xenon. The partial pressure of xenon in the flask is____ atm and the total pressure in the flask is ____ atm.

A sample of nitrogen gas collected at a pressure of 1.16 atm and a temperature of 29.0 °C is found to occupy a volume of 20.9 liters. How many moles of N₂ gas are in the sample____  mol

A helium-filled weather balloon has a volume of 844 L at 14.9°C and 759 mmHg. It is released and rises to an altitude of 3.15 km, where the pressure is 586 mmHg and the temperature is –3.1°C.

The volume of the balloon at this altitude is___ L.

A 25 cm3 sample of an aqueous solution of barium hydroxide, of concentration 0.146 mol dm3 was exactly neutralized by 28.7cm3 of aqueous nitric acid, according to the unbalanced equation: Ba (OH)2 (aq) + HNO3(aq) ˗˗˗˗˗˗˗˗˃ Ba(NO3)2 (aq) + H2O (l) i. i. Calculate the amount of nitric acid in terms molarity and in terms of number of moles

ii. Differentiate molarity and number of moles.

The equilibrium constant Kc of the reaction: H2 (g) + I2 (g) ˂˂˂˗˗˗˗˗˗˗˃˃˃˃ HI (g) is 54.3 at 430 oC. Starting with 6.0 moles of HI in a 1.0 dm-3 reaction vessel.

i. Calculate the concentrations of H2 (g), I2 (g) and HI (g) at equilibrium.

ii. If H2 (g) is added to the reaction vessel to increase its concentration to 2.0 M, determine the reaction quotient Q, then calculate the concentration of all the gases when the new equilibrium is re-established.

How many molecules are there in 311g of NaCl

Which of these compounds would not react when heated with a mixture of potassium dichromate(VI) and sulfuric acid?

A) CH3 OH

B) CH3 (CH2 ) 2 OH

C) (CH3 ) 2 CHOH

D) (CH3 ) 3 COH