Home
Class 11
CHEMISTRY
Average atomic mass of magnesium is 2...

Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole ` %` of `.^(24)Mg` and reamainig 21 mol `%` of `.^(25)Mg` and `.^(26)Mg`. Calculate mole `%` of `.^(26)Mg`.

A

10

B

11

C

15

D

16

Text Solution

AI Generated Solution

Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.61 To Q.90)|30 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.91 To Q.120)|30 Videos

  • STOICHIOMETRY

    NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|30 Videos

  • SOLID STATE

    NARENDRA AWASTHI|Exercise Level 3 - Subjective Problems|1 Videos

  • THERMODYNAMICS

    NARENDRA AWASTHI|Exercise Level 3 - Match The Column|2 Videos

Similar Questions

Explore conceptually related problems

Average atomic mass of magnesium is 24.31 amu. This magnesium is composed of 79 mole % of 24mg and remaining 21 mole % of 25mg and 25mg . Calculate mole % of 26mg .

In a periodic table, the average atomic mass of magnesium is given as 24,312 u. The average value is based on their relative natural abundance on earth. The three isotopes and their masses are " "_(12)^(24)Mg (23.98504 u), " "_(12)^(25)Mg (24.98584 u) and " "_(12)^(26)Mg (25.98259 u). The natural abundance of " "_(12)^(24)Mg is 78.99% by mass. Calculate the abundances of the other two isotopes.

Knowledge Check

  • The average atomic mass of a mixture containing 79 mol % of ""^(24)Mg and remaining 21 mole % of ""^(25)Mg and ""^(26)Mg , is 24.31,% mole of (26)Mg is

    A
    5
    B
    20
    C
    10
    D
    15

  • Assertion: The average mass of one Mg atom is 24.305 amu , which is not actual mass of one Mg atom. Reason: Three isotopes, 24 Mg, 25 Mg and 26 Mg , of Mg are found in nature.

    A
    (a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
    C
    (c )If assertion is true but reason is false.
    D
    (d)If assertion is false but reason is true.

  • How many moles of magnesium phosphate, Mg_3 (PO_4)_2 will contain 0.25 mole of oxygen atoms?

    A
    `0.02`
    B
    `3.125 xx 10^(-2)`
    C
    `1.25 xx 10^(-2)`
    D
    `2.5 xx 10^(-2)`

    • Similar Questions

    Explore conceptually related problems

    In a periodic table, the averge atomic mass of magnesium is given as 24.312 u . The average value is based on their relative natural abundance on earth. The three isotopes and their masses are ._12Mg^(24) (23.98504u) , ._(12)Ng^(25) (24.98584) and ._12Mg^(26) (25.98259 u) . The natural abundance of ._12Mg^(24) is 78.99% by mass. Calculate the abundances of the other two isotopes.

    Calcualte the number of moles of magnesium present in a magnesium ribbon weighting 12g. Molar atomic mass of magnesium is 24 g mol^(-1) .

    Calculate the mole ratio of 240 g of calcium and 240 g of magnesium. (Ca = 40 , Mg = 24 u)

    In magnesium sulphide, the ratio by mass of Mg and S is 3:4. What is the ratio of number of Mg and S atoms?

    How many moles of magnesium phosphate, Mg_3 (PO_4)_2 will contain 0.25 moles of oxygen atoms ?

    Home
    Profile