A concentrated phosphoric acid solution is 85.5% H 3PO 4 by mass and has a density of 1.69 g/mL at 25°C. What is the molarity of H 3PO 4? Must submit required work

A gas sample is heated from −20.0°C to 57.0°C and the volume is increased from 2.00 L to 4.50 L. If the initial pressure is 0.134 atm, what is the final pressure? Must submit required work

The _____ is defined as the number of moles of a particular substance in a mixture divided by the total number of moles of all substances present.

Arrange HF, HCl, and HBr in increasing order of their boiling point.

A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6°C. Determine the temperature at which the volume of the gas is 3.40 L. Must submit required work

A flexible vessel contains 45 L of gas where the pressure is 1.6 atm. What will the volume be when the gas is compressed to a pressure of 0.70 atm, the temperature remaining constant? Must submit required work

A flexible vessel contains 14.00 L of gas at a pressure of 1.27 atm. Under the conditions of constant temperature and constant number of moles of gas, what is the volume of the gas when the pressure of the vessel is decreased by a factor of two? Must submit required work

For an ideal gas, which two variables are directly proportional to each other (if all other conditions remain constant)? 1. T and n2. V and n 3. V and T

What is the OH – concentration of an aqueous solution with a pH of 9.83? ( K w = 1.01 × 10 –14) Note: Written work required

I understand that failure to submit my written work to payned@atc.edu,  within 5 minutes of submitting this test, will result in a 0 score for any questions that required calculations. To receive full credit, I further understand that I must include any formulas used, replacement of variables with appropriate numerical data, and circled correct final result with appropriate units and number of significant figures. Write your initials in space below to acknowledge your understanding.