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29 November, 20:58

Given the following reaction

21.0,

2 H, 0 + 0,

How many moles of 11. will be produced from 26.0 g of H, O,?

moles (round to three significant hgures)

+1
Answers (1)
  1. 29 November, 23:46
    0
    Explanation:58.5g NaCl (mol/58.5g) (6.02 x 1023/mol) = 6.02 x 1023 Na

    +

    Cl21 pre-1982 pennies (after 1982 pennies are mostly zinc with copper coating)

    63.5g Cu (mol / 63.5g) (6.02 x 1023/mol) = 6.02 x 1023 Cu

    19.0g Al (mol/27.0g) (6.02 x 1023/mol) = 4.24 x 1023 Al

    Demo of Oxidation Reactions

    Flash bulb

    2Mg + O2  2MgO fast

    2Cn + O2  2CnO slow

    Copper Oxide Penny

    2Cu + O2  2CuO

    Intro to Chapter

    Stoichiometry is the process of making calculations based on formulas and balanced equations

    Since Modern Chemistry involves:

    Symbolic representation of models

    Mathematics

    Quantitative measurements

    You are going to be using lots of symbols and equations and doing lots of calculations

    The fundamental Question -

    How do you go from combining ratio of atoms (like H2O) to something you can measure in lab?

    OR How do you go between number of ato
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