Other Chemistry Answers

Calculate the percentage abundance of Br-80 and the average atomic weight of bromine in a brine sample that contains 50.54% Br-79 (78.918 amu) and Br-80 (80.916 amu). Express percent abundance up to 2 decimal places

A gas has a volume of 3.00 L and a pressure of 75.4 kPa. when the volume expands to 4.00 L and the pressure drops to 72.7 kPa, the gas temperature is 0C. what was the initial temperature of the gas?

What is the mass of technical calcium carbide with a mass fraction of 12% required for the production of acetylene with a volume of 6.72 l (nu)?

find the number of millimoles of solute in:

a. 2.00 L of 2.76 x 10-3 M KMnO4

b. 250 mL of a solution that contains 4.20 ppm of CuSO4

How many Na+ ions are contained in 4.62g Na3PO4?

A container holds 5gms of ccl4 vapour, calculate the number of moles of ccl4 present

What type of intermolecular force will act in the following substance? Justify your answer. 

a. Sulfur Dioxide (SO₂) 

b. Nitrogen gas (N₂) 

c. Hydrogen fluoride 

A 54.0 ml sample of oxygen is collected over water at 23°C and 770.0 torr pressure. What is the volume of the dry gas at STP (Vapor pressure of water at 23°C= 21.1 torr).

How many grams of KOH are needed in order to prepare 1 litre of a

0.25M solution?

a given mass of gas occupies a volume of 950cm³ at 420/c and 0.92*10⁵ pressure. calculate the volume of the gas at S. T. P