How many moles of Na2SO4 are present in 284.078 grams of Na2SO4? A. 2 B. 3 C. 5 D. 6

Question

How many moles of Na2SO4 are present in 284.078 grams of Na2SO4?
A. 2
B. 3
C. 5
D. 6

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Edana Edana 5 years 2021-08-29T17:58:10+00:00 2 Answers 112 views 0

Answers ( )

  1. Ben
    0
    2021-08-29T17:59:12+00:00
    Reply

    It’s A. 2
    Explanation:
    First step: find out how many grams are in one mole of Na2SO4
    Multiply the number of atoms by the mass of the element
    Na: 2 * 23 = 46 units
    S: 1 * 32 = 32 units
    O: 4 * 16 = 64 units
    Add them all together
    142 g/mol
    Now set up the table

  2. thugiang
    0
    2021-08-29T17:59:18+00:00
    Reply

    i think it’s b but i could be wrong

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )