Calculate the mass of na3po4 needed to remove ca ions
A hard water sample contains 121 mg of CaCO3 per liter of water. Assuming the reaction goes to completion, calculate the mass of Na3PO4 needed to remove all Ca^2+ ions from 2.50 L of the water sample?
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Prepare solution by dissolving .702g of Fe(NH4)2(SO4)2·6H2O in 50mL of water containing 1 mL of concentrated H2SO4. transfer solution completely to a 1L volumetric flask and dilute to exactly 1 liter. Calculate the Fe2+ ion concentration.
A loudspeaker of mass 16.0 is suspended a distance of = 2.20 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 4.00 .
How many grams of methanol must be added to 7.50kg of water to lower its freezing point to -15.0^circ C? For each mole of solute.
What is the total sample size (in grams) for a sample of disulfur octoxide which contains 3.52 g of oxygen?
Imagine that you are a food service manager working in the kitchen, and one day a local health inspector walks in. What is the proper procedure for guiding a health inspector through a food service establishment?
The first person is initially moving forward with a speed of 2.50 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.
When 20 mL of a 315 mL stock solution containing 2.2 M AlCl3 is diluted to 81 mL, what is the concentration of Al3+ in the new solution?
If a sample of a compound of carbon and oxygen contains 3.00g of carbon and 8.00g of oxygen, what is the mass percent of carbon in the compound?
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