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Vitamin K is involved in normal blood clotting. When 0.647 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 2.17 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitamin K.
Write a balanced chemical equation describing what happens when you mix solutions of sodium phosphate, Na3PO4, and calcium nitrate, Ca(NO3)2. Include the phases in your equation.
Explain how much energy in kilojoules is needed to heat 5.00g of ice from -10.0 degrees Celsius to 30.0 degrees Celsius? The heat of the fusion of water is 6.01 kJ/mol, as well as the molar heat capacity is 36.6 j/(k . mol) for ice as well as 75.3..
The molecular shape of [TeF3 ]-1 is: A. tetrahedral B. square planar C. square pyramidal D. trigonal bipyramidal E.octahedral F. T-shaped G. see-saw, butterfly, or unsymmetrical tetrahedron
Problem- Find the molecular, ionic, and net ionic equations for the following. Underline all solids. If no reaction occurs, complete the molecular and ionic equations, but write "no reaction" in place of the net ionic equation.
Compute concentration of the I- ions in a solution if 4.0mL of 0.30 M KI is added to 4.0mL of 0.45 M NaI and 2.0mL of water.
How much more soluble is AgCl in 1 Molar NH3 than in water?
Pure liquid water can be supercooled to temperatures below its freezing point. Consider 10 kg of water cooled as a liquid to -10 Celsius. Let's now add a small crystal of ice (whose mass is negligible) as a "seed"
If 2.50 g of CuSO4 are dissolved in 9.5 102 mL of 0.21 M NH3, Explain what are the concentrations of Cu(NH3)42+, NH3 and Cu2+ at equilibrium
During a work-up, we are asked to interrupt vacuum, "drizzle" cold methanol over the crude product, then reestablish vacuum. What is the purpose of this step and why does the methanol need to be cold
an aqueous solution of phosphoric acid h3po4 contains 285g h3po4 in 400 ml solution and has a density of 1.35gml.
Calculate the theoretical yield for the bromination of both stilbenes and cinnamic acid, assuming the presence of excess pyridinium tribromide.
A reaction mixture contains 0.41 M I2, 0.27 M Br2 and 3.5 M IBr. Which of the following statements is TRUE concerning this system. I2(g) + Br2(g) 2 IBr(g) Kc = 1.1 × 102
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