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A solution is made by dissolving 0.40 mole of NaCl in enough water to give a final volume of 250.0 ml . What is the molarity of the solution?
Osmotic pressure of a solution containing dissolved protein of solution is 20 MmHg at 27 degrees C calculate the concentration of protein
A solution containing 25.6 g of sulfur dissolve in 1000g of naphthalene gave a freezing point lowering of 0.680. what is the molar mass of solute? For naphthalene k(6.8k/m)
A force of 250 N exerted at an angle of 30° above the horizontal is needed to keep a 90 kg block moving along a
cement floor. Find the coefficient of kinetic friction.
What is the limiting reactant
Let p, q, and r be true, false and false, respectively. Determine the truth value of the
following?
a.) (p → q) ∧∼ r
b.) q ↔ (p ∧ r)
What is Kuznets’ Puzzle? Explain how the life cycle hypothesis resolves it.
A 45.60g sample of a gaseous flurocarbon contains 7.9g of carbon and 37.66g of fluorine and occupies 7.40L at STP(P=1.00atm and T=273.15k). Determine the approximate molar mass of the flurocarbon and give it's molecular formula
Write each of the propositions in the form “p if and only if q”:
a.) For you to get a passing mark in this course, it is necessary and sufficient that you
learn how to solve mathematics problems.
b.) If you read the newspaper every day, you will be informed, and conversely.
A solid hydrocarbon is burned in air in a closed container,producing a mixture of gases having a total pressure of 3.34 atm. Analysis of the mixture shows it to contain 0.340g of water vapour,0.792g of carbon dioxide,0.288g of oxygen,3.790g on nitrogen and no other gases. Calculate the mole fraction and partial pressure of carbondioxide in this mixture
#339914 on Dec 2023