Ammonium phosphate ((NH4)4) PO is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid (H,PO) with liquid ammonia. Calculate the moles of ammonium phosphate produced by the reaction of 0.075 mol of phosphoric acid. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.

A student sets up the following equation to solve a problem in solution stoichiometry. (The ? stands for a number the student is going to calculate.) Enter the units of the student's answer. (0.19 L) 1 mL 10-³ 146.86 g mol 1.04 mL = ☐ x10 ロ･ロ X I 00

Given the following equation: 8 Fe + Sg → 8 Fes How many moles of iron is needed to react with 16.0 moles of sulfur? Show all of your work and round to the correct number of significant figures.

A chemist prepares a solution of iron II  chloride    FeCl2    by measuring out  3.0g  of  FeCl2  into a  300.mL  volumetric flask and filling to the mark with distilled water.   Calculate the molarity of Cl−  anions in the chemist's solution.   Be sure your answer is rounded to the correct number of significant digits.

Suppose 5.71 g of potassium chloride is dissolved in 350. mL of a 64.0 m M aqueous solution of silver nitrate. Calculate the final molarity of chloride anion in the solution. You can assume the volume of the solution doesn't change when the potassium chloride is dissolved in it. Be sure your answer has the correct number of significant digits.

y

A standard acid was prepared by placing 5.98 grams of H2C2O42H2O (molar mass:  126.07 g/mole) into a 250.00-milliliter volumetric flask. H2C2O4 (molar mass:  90.04 g/mole) For the blanks in this question: Report here only your numerical answers (without units), if the value is less than zero as a decimal (not in scientific notation), to the correct number of significant figures. Calculate the moles of H2C2O4 in the flask.  Calculate the grams H2C2O4 in the flask.   Calculate the molarity of the solution if the volumetric flask is filled to the mark with water.

Burning coal that contains sulfur releases sulfur dioxide gas into the atmosphere where it combines with water to form sulfurous and sulfuric acid, thereby producing acid rain. Assume sulfur in coal is in the form of pyrite (FeS2(s)), which reacts with molecular oxygen to produce Fe2O3(s) and SO2(g). Write the balanced equation for this reaction and report the sum of the stoichiometric coefficients, written as integers.

Ammonium phosphate ((NH,) PO,) is an important ingredient in many solid fertilizers. It can be made by reacting aqueous phosphoric acid (H,PO,) with liquid ammonia. Calculate the moles of ammonia needed to produce 0.085 mol of ammonium phosphate. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits. olo 4

Aqueous hydrobromic acid HBr reacts with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water H2O. If 10.0g of water is produced from the reaction of 58.3g of hydrobromic acid and 50.1g of sodium hydroxide, calculate the percent yield of water. Be sure your answer has the correct number of significant digits in it. I keep getting this problem wrong because of the sig. digits, dont round till the end because if it is off by 0.1, it will be incorrect.