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What is the mass in grams of a hydrogen ...

What is the mass in grams of a hydrogen chloride, HCl?

Text Solution

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The molecular weight of HCl equal to the atomic weight of H, plus the atomic weight of Cl, (ie) (1.01 + 35.5) amu = 36.5 amu. Therefore 1 mol of HCl contains 36.5 g HCl
Mass of HCl molecule `=(36.5 g)/( 6.02 xx 10^(23))`
`= 6.06 xx 10^(-23)g`
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How many molecules are there in a 3.46 g sample of hydrogen chloride, HCl? Note: The number of molecules in a sample is related to moles of compound (1 mol HCl = 6.023 xx 10^(23) HCl molecules). Therefore if you first convert grams HCl to moles, then you can convert moles to number of molecules).

Knowledge Check

  • The mass of a mole of hydrogen atoms is

    A
    `1.008g`
    B
    `2.016g`
    C
    `6.02xx10^(23)g`
    D
    `1.008amu`

  • The molar mass of hydrogen is

    A
    `1.008g`
    B
    `2.016g`
    C
    `6.02xx10^(23)g`
    D
    `2.016amu`

  • The molar mass of hydrogen is

    A
    1.008g
    B
    2.016g
    C
    `6.02 xx 10^(23)g`
    D
    2.016 amu

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