Consider the following unbalanced reaction.

P4(s) + F2(g)---> PF3(g)
How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield?

I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me a hand.

  1. 👍 0
  2. 👎 0
  3. 👁 218
  1. well, there are about 50 ways to do it.

    114 g of PF3 has how many grams of F in it? 114*atomicmassF/molmassPF3= 114(31/(50)=? you can work all that more accurately.

    so how many grams of F2 is this? answer: 1/2 of the above.
    With 80.3 percent yield? you need aboveF2 mass* (1/.803) grams F2

  2. The conventional way to do this is with mole ratios, but it has to be balanced first.

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    In the reaction below, ΔH°f is zero for ___________. Ni(s) + 2CO(g) + 2PF3(g) = Ni(CO)2(PF3)2(l) Ni(s) CO(g) Ni(CO)2(PF3)2(l) both CO(g) and PF3(g) PF3(g)

    asked by danny on January 31, 2015
  2. Chem

    f 147 grams of FeS2 is allowed to react with 88 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

    asked by Valarie on September 19, 2010
  3. Chemistry (Check)

    PF3 reacts with XeF4 to give PF5 2PF3(g) + XeF4(s) --> 2PF5(g) + Xe(g) How many moles of PF5 can be produced from 100.0 grams of PF3 and 50.0 grams of XeF4? 100.0gPF3 x (1molePF3 / 87.96896gPF3) x (2molesPF5 / 2molesPF3) =

    asked by Anonymous on November 3, 2015
  4. chemistry

    How many grams of O2 are needed to produce 45.8 grams of Fe2O3 in the following reaction? 4Fe(s)+3O2(g) - 2Fe2O3(s)

    asked by richard w on February 27, 2013
  5. General Chemistry

    A reaction vessel contains 7.92 g of CO and 7.92 of O2. How many grams of CO2 could be produced according to the follow unbalanced reaction? CO + O2 --> CO2

    asked by Madison on February 20, 2019
  1. chemistry

    Examine the unbalanced equation. CH4 + O2 → CO2 + H2O What is the best classification for the unbalanced equation's reaction, and why? It is a combustion reaction because carbon dioxide (CO2) is emitted as a product. It is a

    asked by check please on September 4, 2017
  2. physics

    A ball rolls down a hill mainly because of: a. an unbalanced torque b. an unbalanced force c. its rotational inertia d. angular momentum I think it is d - but I am unsure. Any advice?

    asked by Claire on July 22, 2008
  3. chemistry

    5. Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) --> Mg(OH)2(s) + H2(g) Calculate the number of grams of Mg needed for this

    asked by tra on May 14, 2013
  4. Chem

    For each unbalanced equation below, calculate how many grams of each product would be produced by complete reaction of 12.5g of the reactant indicated. Indicate clearly the mole ratio used for the conversion. A.

    asked by OliviaK on June 25, 2008
  5. chemistry

    What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?

    asked by bill on March 10, 2013
  6. ap chem

    consider the molecules PF3 and PF5. b]is the PF3 molecule polar or is it nonpolar. explain C] on the basis of bonding principles, predict whether each of the following compounds exists. In each case explain your prediction. (i)

    asked by Emily on January 23, 2007

You can view more similar questions or ask a new question.