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Get college assignment help at uniessay writers a student has 9.3ml of a 1.5m h3po4 solution and reacts this with excess ammonia and magnesium under basic conditions ro produce 3.3999g of struvite. calculate % yield

An 8.00 g sample of an iron ore was dissolved in

An 8.00 g sample of an iron ore was dissolved in an acid solution and the iron converted to the 2 oxidation state. The resulting solution took 75.0 mL of 0.200 M KMnO4 solution to titrate to a light pink color. 5 Fe2 MnO4- 8H –> 5 Fe3 Mn 2 4H2O What was the percent iron in the ore?

Answer to six significant figures. A tablet of vitamin C was

Answer to six significant figures. A tablet of vitamin C was analyzed to de- termine whether it did in fact contain, as the manufacturer claimed, 1 g of the vita- min. One tablet was dissolved in water to form 100 mL of solution, and 10 mL of that solution was titrated with iodine (as potas- sium triiodide). It required 11.8 mL of 0.0542 M I3- (aq) to reach the stoichiometric point in the titration. If 1 mol I3- reacts with 1 mol vi- tamin C in the reaction, how much vitamin C was in the tablet? The molar mass of vitamin C is 176 g/mol. Answer in units of g.

List the basic solution in order of increasing basicity. NaNO2, HNO2,

List the basic solution in order of increasing basicity. NaNO2, HNO2, C2H5NH2, NaNO2, Ca(OH)2

What volume of 2.0 M NaCLO must be diluted with water

What volume of 2.0 M NaCLO must be diluted with water to prepare 500.0 mL of 0.10 M NaCLO?

an overweight high school student, is overhead telling her friend that

an overweight high school student, is overhead telling her friend that she’s going to research how she can transform some of her white fat to brown fat. What is her rationale here ( assuming it is possible)?

whats the electron dot structure for C2Cl4

whats the electron dot structure for C2Cl4

lewis structure for HSiO3-

lewis structure for HSiO3-

Lewis dot digram for LiSO4

Lewis dot digram for LiSO4

. The lid is tightly sealed on a rigid flask containing

. The lid is tightly sealed on a rigid flask containing 3.50 L H2 at 17 °C and 0.913 atm. If the flask is heated to 71 °C, what is the pressure in the flask?

A student has 9.3mL of a 1.5 M H3PO4 solution and

Get college assignment help at uniessay writers A student has 9.3mL of a 1.5 M H3PO4 solution and reacts this with excess ammonia and magnesium under basic conditions to produce 3.3999 g of struvite. Calcute the % yield. (Note: 1 mole of H3PO4 forms 1 mole HPO4 under these reaction conditions)

A 90.0 g piece of hot iron is placed in a

A 90.0 g piece of hot iron is placed in a calorimeter containing 125 mL water at 19.8 degrees celcius. If the final temperature of both the water and the iron is 24.6 degrees celcius, what is the initial temperature of the hot iron?

In the laboratory you dissolve 13.5 g of zinc iodide in

In the laboratory you dissolve 13.5 g of zinc iodide in a volumetric flask and add water to a total volume of 500 mL. What is the molarity of the solution ?

Write the orbital diagram for Au

Write the orbital diagram for Au

The kinetic energy of a rolling billiard ball is given by

The kinetic energy of a rolling billiard ball is given by {rm{KE}} = 1/2,mv^2 . Suppose a 0.17-{rm kg} billiard ball is rolling down a pool table with an initial speed of 4.7 m/s. As it travels, it loses some of its energy as heat. The ball slows down to 4.0 m/s and then collides straight-on with a second billiard ball of equal mass. The first billiard ball completely stops and the second one rolls away with a velocity of 4.0 m/s. Assume the first billiard ball is the system

What is the enthalpy of combustion (in kJ/mol) for acetone (CH3COCH3)

What is the enthalpy of combustion (in kJ/mol) for acetone (CH3COCH3) under standard conditions (water is produced as a liquid)? Use the appendix in your textbook, do not enter units, and answer with 5 significant digits.

a chemical reaction produced .311 g sample of gas which occupied

a chemical reaction produced .311 g sample of gas which occupied 225 mL at 55 degrees C exerting a pressure of 86 mm Hg. what is the molar mass of the gas?

Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and

Given that carbonic acid, H2CO3, has a pKa1 = 6.37 and a pKa2 = 10.33, please answer a and b below. a. If you wanted to make a pH 7 buffer solution starting with NaHCO3(aq), would you add 0.10 M HCl or 0.10 M NaOH? 0.10 M NaOH 0.10 M HCl . b. If you began with 10.5 mL of 0.15 M NaHCO3, how many mL of your choice from above would you need to add to get a pH 7 buffer?

A sample of H2 id collected by displacing 145mL of water.

A sample of H2 id collected by displacing 145mL of water. The pressure of gas and the atmosphere equalized. The atmospheric pressure is 745 mmHg. THe temperature of water and theatof the gas are identical at 26 degress C. The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?

“A sample of H2 is collected by displacing 145mL of water.

“A sample of H2 is collected by displacing 145mL of water. The pressure of gas and the atmosphere equalized. The atmospheric pressure is 745 mmHg. THe temperature of water and theatof the gas are identical at 26 degress C. The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?”

3. Suppose you prepared benzyl by the reduction of benzoin, describe

3. Suppose you prepared benzyl by the reduction of benzoin, describe how you could use TLC (thin layer chromatography) to decide when the reaction complete.

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