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1) A student placed 14.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 30.0- sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?
2)Beaker Contents1 200. mL of 1.50 M NaCl solution2 100. mL of 3.00 M NaCl solution3 150. mL of solution containing 25.5g of NaCl4 100. mL of solution containing 25.5g of NaCl5 300. mL of solution containing 0.450 mol NaCl Arrange the solutions in order of decreasing concentration.Rank from most concentrated to least concentrated. To rank items as equivalent, overlap them.
3)A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions?
what effect does changing from room temperature to 37 have on the activity of the enzyme? 5 what does copper II sulfate to do the enzyme
one mole of silicon si has a mass of 28.086 g, and one mole of carbon has a mass of 12.011 g. what is the mass of one mole of silicon carbide ?
Calorimetry is a method used to measure enthalpy, or heat, changes that occur during chemical processes. Two common calorimeters are constant-pressure calorimeters and constant-volume (or "bomb") calorimeters
the rate of the constants for the above gas pharse reaction is 1.438M^-2 s^-1 at exactly 642.5 Kelvin and 21.64 M^-1 s^-1 at exactly 838.1 Kelvin. What is the value of the activation energy of the reaction in KJ/mole?
Concrete used in road construction is reinforced using steel bars in a grid, known collectively as "rebar." After many years, rebar will begin to corrode, and the concrete will weaken.
how many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?
A gas sample containing 0.3525 moles of a compound is trapped in a 2.641 liter vessel on a manifold at a temperature of 28.4 oC. What is the pressure in the vessel,
the pH of a saturated solution of a metal hydroxide MOH is 9.30. calculate the Ksp for the compound
A 75.0-mL volume of 0.200 NH3 is titrated with 0.500 M HNO3 . Calculate the pH after the addition of 19.0 mL of HNO3
How many grams of dry NH4Cl need to be added to 1.80L of a 0.400M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.90? Kb for ammonia is 1.8*10^-5.
The _______ of a titration occurs when the indicator changes color.
What is the empirical formula for the hydrocarbon?
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