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Question- Estimate the volume of a solution of 2.3 M NaOH that must be added to adjust the pH from 4.0 to 9.0 in 61 ml of a 68 mM solution of phosphoric acid.
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The molar mass of unknown gas was measured by effusion experiment. it was found that it took 57s for the gas to effuse, whereas nitrogen gas required 48s. what is the molar mass of the gas
Predict the ionization energy of Li2+ given that the ionization energy of He+ is 54.4eV. whats the math work on this too
Calculate the average value of the cosine of the angle between the electric field direction and the molecular dipole, , of a collection of molecules each with a dipole moment,µ=1.0 x 10-29 Coulomb meters
Calculate the absolute error and relative error for each measurement made by the glucose monitor
A runner in training ran a pace test at a truck and came up with the following 1.0 mile lap times in minutes/seconds.5:54, 6:02, 6:04, 6:09, 5:48. a) What was his average pace in minutes per mile?
A 2.8x10-4 km of a gas a pressured of 25 psi when the temperature is 45c. Explain what the volume of the gas is if the pressure is increased to 960.69 torr as well as the temperature is increased to 320 c
A typical automobile gets 30 miles per gallon of gas and drives 12,000 miles every year. Assuming that octane (C8H18, density 0.7025 g cm-3) is a principal component of gasoline
Consider the titration of 30.0 mL of 0.035 M NH3 with 0.025 M HCl. Calculate the pH after the following volumes of titrant have been added.
lemon juice is a complex aqueous solution that does not freeze in ahome freezer at temperatures as low as -11 degc. at
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When 0.234 g of the hydrate Cr2(SO4)3•xH2O is heated, 0.128 grams of anhydrous Cr2(SO4)3 remains. What is the value of x in the formula for the hydrate
A 25.0g sample of nitrogen (N2) has a volume of 50.0L and a pressure of 630.0 mmHg. What is the temperature of the gas.
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