Ask questions and get helpful responses.

chemistry (science)

When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction
CaCO3 ---> CaO + CO2

How many grams of calcium carbonate are needed to produce 73.0 of carbon dioxide at STP?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. 73.0 WHAT</b) of carbon dioxide?????
    I will assume you mean grams but if not grams you must adjust the work accordingly.
    You have the balanced equation.
    2. Convert 73.0 g CO2 to mols. moles = grams/molar mass.
    3. Using the coefficients in the balanced equation, convert moles CO2 to moles CaCO3.
    4. Now convert moles CaCO3 to grams. grams CaCO3 = moles CaCO3 x molar mass CaCO3.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. 73 g CO2 is how many moles?

    From the balanced equation, it takes one mole of calcium carbonate to produced one mole of carbon dioxide.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    👤
    bobpursley
  3. I did it like

    76.0Lof CO2/22.4L = 3.2589moles of CO2
    Moles of CO2 = Moles of CaCaCO3

    to convert it in g's:
    3.2589moles of CaCO3*(100g/1mole Of CaCO3)
    = 325.89g

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  4. OK. So it's 73.0 LITERS. You made a typo in your work where you typed 76.0 BUT your answer is correct for 73.0/22.4. If you are keying this answer into an on-line database, I suspect your answer is coming back wrong because you are posting too many significant figures. Your answer should be rounded to 326 grams CaCO3.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  5. ohh yea i figured that out. nd thnxxx a lot fohh ur help.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  6. 130.28 gr

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  7. 166 gr

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Still need help? You can ask a new question.