Chemistry 2 notes 6 - WEIGHT-WEIGHT PROBLEMS...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: WEIGHT-WEIGHT PROBLEMS Problem #2: (quantity in moles) What weight. of oxygen can beeobtained by heating 2.50 moles of potaSsium chlorate? Solution ' 1. Write the bdlanCed'equatiEon. 2. Note the coefficients of the 2 moles KC103 balanced equation equal the 2 moles KCI ' ' " " ' ‘ 3 mol'e's'Og' number of moles. 2.50 moles x moles 2 KC103 9 ‘2 KCl + 3 Oz ‘ . Put the given number of moles on _ top ’of each substance under consideration. . Form the proportion. ' 2 X =2 7.50 linoleslflokygen . Cress-multiply, and solve for x. Convert the moles to grams if needed. ' ' 3.75 moles x 32 g/mole >< ll 120 g of oxygen 2KClO‘3 ~> ZKCl +. 302 WEIGHT—WEIGHT PROBLEMS WITH MOLES 1. When 2.0 moles of zinc react with hydrochloric acid, how many moles of hydrogen ‘gmzs formed? 2 .Q mesh; x moles Zn + 2 MC} ~~——~> chta; + H2 Q : 2L X : 2.0 Meier of? h‘gdf‘ogm l 1 3(3). 3 H i 0 <3 H2 rpm 2. How many moles of HgO are needed to produce 5.0 moles of oxygen? 5‘ 0 males X QHgO M>ZH3 1‘ Q; .75. .. 3.5.. x 0 2 - l 2179 2' 2I70 3 H30 moi x : to males H30 3. HOW many moles of magnesium chloride are formed When 3.0 moles of magnesium react with hydrochloric acid? 3.0 mole; X Moles 1003 + ZHCI m) Imam + H2 »%2 If x: 3.0 males 4. 4.0 moles of calcium hydroxide are formed when calcium oxide reacts with water. How many moles of CaO are required to prepare this quantity? X P00] ”‘0 “‘0‘ CuO '1‘ H20 "“7 Co.(0H)Z X Z Li Moles CHE llO: Introductory Chemistry 4 2 ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern