Question

Lab #9: Using Stoichiometry

Answer the following questions using the below balanced chemical reaction. Include units for ALL answers!

1. What is the chemical formula and molecular weight of magnesium hydroxide?

1. What is the chemical formula and molecular weight of phosphoric acid?

1. What is the chemical formula and molecular weight of water?

1. What is the molecular weight of magnesium phosphate, Mg3(PO4)2?

1. Open the pdf entitled, "Molecular Conversions Puzzle Pieces". Print either pages 1-3 (color) or pages 4-6 (black and white). Cut out all your puzzle pieces, 15 pieces in total. Place a piece of clear tape over the boxes drawn on the pieces, or anything you want to write on with a dry erase marker.

1. If you are asked to convert from grams of Mg(OH)2 to molecules of Mg(OH)2, which puzzle pieces will you utilize? Sketch their shapes here. (Hint: Mg(OH)2 is represented by "A".)

1. If you are asked to convert from molecules of Mg(OH)2 to grams of Mg(OH)2, which puzzle pieces will you utilize? Sketch their shapes here. (Hint: Mg(OH)2 is represented by "A".)

1. If you are asked to convert from grams of Mg(OH)2 to grams of H2O, which puzzle pieces will you utilize? Sketch their shapes here. (Hint: Mg(OH)2 is represented by "A" and H2O is represented by "B".)

1. Use the puzzle pieces to convert 5.8 grams of Mg(OH)2 to molecules of Mg(OH)2Show all work and units for this and future questions.

1. Use the puzzle pieces to convert 4.26 x 1022 molecules of Mg(OH)2 to grams of Mg(OH)2.

1. Use the puzzle pieces to convert 5.8 grams of Mg(OH)2 to grams of H2O, assuming excess phosphoric acid.

1. If 3.29 x 1025 molecules of phosphoric acid react with excess magnesium hydroxide, how many molecules of magnesium phosphate, Mg3(PO4)2 would be produced? Use the puzzle pieces. (Hint: the answer to this is shown in the video, so you should get this correct!!)

1. If 3.29 x 1025 molecules of phosphoric acid react with excess magnesium hydroxide, how many grams of magnesium phosphate, Mg3(PO4)2 would be produced? Use the puzzle pieces.

1. If 3.21 grams of magnesium hydroxide react with excess phosphoric acid, how many grams of magnesium phosphate, Mg3(PO4)2 would be produced? Use the puzzle pieces.

1. Convert 2.27 grams of magnesium phosphate, Mg3(PO4)2 to moles of Mg3(PO4)2.

Balance the following equation then answer the following questions using the balanced chemical reaction. Include units for ALL answers!

1. How many oxygen atoms are on both sides of the balanced chemical equation above?

1. What is the chemical formula and molecular weight of nickel (III) oxide?

1. What is the atomic mass for nickel?

1. What is the molecular weight of oxygen, O2

1. Convert 3.27 g of Ni2O3 to grams of Ni. Additionally, sketch the shapes of the puzzle pieces you utilized below this question.

1. Convert 5.75x1024 molecules of Ni2O3 to grams of O2. Additionally, sketch the shapes of the puzzle pieces you utilized below this question.

1. Place this worksheet a picture of you with your puzzle pieces for one of these questions into the D2L dropbox.

Image transcriptions

Molecular Conversions Puzzle Pieces moles of B * moles of A moles of A &quot;mole ratio from balanced chemical equation moles of B molecules (or atoms) of A 1 mole of A 6.022x1023 6.022x1023 molecules (or atoms) of B molecules (or atoms) of A 1 mole of B Avogadro's number Avogadro's number g A g A g B 1 mole of A mass of A mass of B &quot;use the molar mass of A 1 mole of A * g A g A &quot;use the molar mass of A mass of A

1 mole of B 5.022)I:1023 molecules [or atoms) of A 1 mole of A Molecular Conversions Puzzle Pieces— Black and White (or atoms) of A

1 mole of A 6.022x1023 6.022x1023 molecules (or atoms) of B molecules (or atoms) of A 1 mole of B Avogadro's number Avogadro's number g A g B 1 mole of A &quot;use the molar mass of A 1 mole of A g A g A &quot;use the molar mass of A mass of A molecules g B (or atoms) of B 1 mole of B &quot;use the molar mass of 6.022x1023 molecules (or atoms) of A molecules 1 mole of A (or atoms) of A Avogadro's number