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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
What is the final temperature when 150.0 g of water at 90.0oC is added to 100.0 g of water at 30.0 oC?
Consider a solution prepared by adding 2.70 grams acetic acid to 122.8 grams of water:
a. what is the percentage by mass of concentration of acetic acid in this solution?
b. what is the mass of acetic acid is present in 25.0 grams of this solution?
Which term of the sequence 3, 12, 48,... is equal to 196 608?
Is it 12th, or, 10th, or 11th, or 9th.
Define Le Chatelier’s Principle
