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Given that the molar mass of H3PO4 is 97.994 grams, determine the number of H3PO4 needed to prepare 0.25 L of a 0.2M H3PO4 solution. What volume, in Litera, of a 0.2M H3PO4 solution can be prepared by diluting 50 mL of a 5M H3PO4 solution?
Calculate the concentration (molarity) of iron in a dilutedsolution if 5.00 mL of 5.0x10^-4 M Fe(NH4)2(SO4)2 6H2O isdiluted with water to 100.0 mL.
Calculate the volume of a 2.00 M KOH solution needed to neutralize 40.0 mL of a 0.600 M H2SO4 solution.
What volume in mL of concentrated nitric acid (72.0% HNO3 (w/w), sp. gr. 1.42) is required to prepare exactly 2.00 L of 0.200 M HNO3?
Calculate the vapor pressure of water at 35 degrees Celsius given delta Hvap= 44.0 kJ/mol and the vapor pressure of water at 25 degrees Celsius is 23.8 torr
a boy titrates fifty mili litres of apple juice and observes the givenfinal buret reading- 17.86 ml initial buret
How many moles of (NH4)3PO4 are present in 100.0 mL of 2.50 M (NH4)3PO4?
A gaseous mixture containing 0.200 mol fraction of carbon tetrachloride (CCl4) and 0.800 mol fraction of dry air is initially at 68.0°C and 1169 mmHg. 1- If this mixture is cooled at a constant pressure, at what temperature does the CCl4 first sta..
Explain how FeBr3 assists the reaction. Br2 dissolves in a number of solvents, but we preferentially use glacial acetic acid.
A 14.0-g sample of CaCl2 is dissolved in 131 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C ..
Draw a tetra-peptide that FPHD at pH 2.0. Clearly indicate with a circle what groups would be charged if the pH was changed to 12.0. Draw a box around the peptide bonds
tim and a friend left a campsite on a trip down a river in a canoe maintaining a constant speed of 4 miles per hour.
The concentration of Mg2+ in seawater is 0.052 M. What hydroxide concentration is needed to remove 90% of the Mg2+ by precipitation
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