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If water is added to 2mol of sodium chloride in a flask until the volume of the solution is 1 liter, what is the molarity of the solution?
What is the molarity when water is added to 2 moles of sodium chloride to make 0.5 liter of solution?
How many atoms are present in a 75.0cm^3 sample of plumber's solder, a lead-tin alloy containing 67%Pb by mass and having a density of 9.4g/ml
Calculate the de Broglie wavelength for each of the following.a 57 g ball with a velocity of 35. m/s b an electron with a velocity 12% the speed of light.
A 1.00-mol sample of an ideal monatomic gas is compressed isothermally and irreversibly in one step from 2.50 atm to 6.50 atm at 300.0 K. Calculate G for this process.
Phosphate systems form essential buffers in organisms. Calculate the pH of a buffer made by dissolving 0.80mol of NaOH in 0.50L of 1.0M H3PO4.
25.0 mL of 1.50M LiOH are neutralized by 15.0mL of nitric acid. what is the molarity of HNO3?
Write the chemical equation for the reaction that occurs when you add HCl solution to a CH3CO2H/NaCH3CO2 buffer system
When SiO2 is heated to melting, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. in an industrial preparation of silicon, 155.8 Kg of SiO2 reacts with 78.3 Kg of carbon to produce 66.1 Kg of silicon.
an element t burns in air with a blue flame forming white fumes which dissolve in water to form a solution that turns blue litmus paper red(t is not the actual symbol)
to make up a solution of phosphate buffered saline pbs you need 5mm na2hpo4 anhydrous fw 141.96 0.15 m nacl fw 58.44
how many moles of zinc were oxidized. by how many grams did the mass of of the zinc electrode change during this process
The community of Enviro, US (population 26,300) tests its drinking water supply for coliform organisms by the fermentation tube method (five 10 ml portions per sample).
Calculate the mass of precipitate that forms when 250 mL of an aqueous solution containing 35.0g of lead (2) nitrate reacts with excess sodium iodide solution by the following reaction.
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