Physics, 18.10.2019 23:30 mccoykanye
You are asked to prepare a ph=3.00 buffer solution starting from 1.25 l of a 1.00m solution of hydrofluoric acid (hf) and an excess of sodium fluoride (naf). part a what is the ph of the hydrofluoric acid solution prior to adding sodium fluoride? express your answer using three significant figures. php h = nothing request answer part b how many grams of sodium fluoride should be added to prepare the buffer solution? neglect the small volume change that occurs when the sodium fluoride is added. express your answer using two significant figures. mm = nothing g
Answers: 3
Physics, 21.06.2019 22:10, edjiejwi
Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.
Answers: 3
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Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?
Answers: 1
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In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?
Answers: 1
You are asked to prepare a ph=3.00 buffer solution starting from 1.25 l of a 1.00m solution of hydro...
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