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how much sodium hydroxide must be added to a sample of seawater to completely precipitate 89.2 mg of magnesium ions present?
A chemist wants to make 5.1 L of a 0.291 M CaCl2 solution. What mass of CaCl2 (in g) should the chemist use
A gas-filled balloon having a volume of 2.50L and 1.2 atm and 25 Celsius is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23 Celsius and 3.00 x 10^-3 atm, respectively. Calcul..
The simplest formula of a substance is found to be CH2O, and its approximate molar mass is found by experiment to be 93 g•mol-1. What is its exact molar mass?
stable conformation, CH3 at 0,120d, H at 240, then on the other side has H at 0, 120, CH3 at 240d?? and is this a gauche conformation?
If a sample of oxygen that occupies 1.00 x10^6 mL at 575 mmHg is subjected to a pressure of 1.25 atm, what is the final volume of the the sample?
Calculate the values of E for the cell when the following volumes of the Ce^4+ titrant have been added. (Activity coefficients may be ignored as they tend to cancel when calculating concentrations of ratios.
What is the percent yield of a reaction in which 260. g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 127 g HCl?
The total volume of both metals is measured by the displacement of water to be 426 and the total mass is 4.40 . What percentage of the spheres are copper?
A block of aluminum with a volume of 98.5cm^3 absorbs 68.4J of heat. If its initial temperature was 31.9 degrees celsius, what is its final temperature
Calculate the number of moles of ions present in 15.1 g of a solution that is 6.30% MgSO4 by mass. What formula do you use for this problem?
Discuss how plastics are used in everyday life and cutting edge technology and what the pitfalls are of plastics.
Calculate the molality of the solution and the 95% CL, and write the final result with correct format.
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