chemistry

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of HCl are allowed to react, identify the limiting reagent.

Mg

HCl

MgCl2

H2

QUESTION 8

When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 48.6 g of Mg and 150.0 g of HCl are allowed to react, identify the limiting reagent.

Mg

HCl

MgCl2

H2

QUESTION 9

The number of moles of the reagent in excess can be used to calculate the moles of the products of the reaction.

TRUE

FALSE

QUESTION 10

Ammonia gas is formed from nitrogen gas and hydrogen gas according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 112 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 120 grams of ammonia, what is the percent yield of this reaction?

44.1%

66.2%

88.3%

96.4%

QUESTION 11

Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation: N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 84.0 g of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 85.0 g of ammonia, what is the percent yield of this reaction?

42.2%

65.0%

70.3%

83.3%

QUESTION 12

Ammonia gas is formed from nitrogen gas and hydrogen gas, according to the following equation, N2 (g) + 3H2 (g) Imported Asset 2NH3 (g). If 140 grams of nitrogen gas is allowed to react with an excess of hydrogen gas to produce 155 grams of ammonia, what is the percent yield of this reaction?

45.5%

67.0%

82.4%

91.2%
3 points Save Answer
QUESTION 13

The actual yield is usually less than the predicted (theoretical) yield.

TRUE

FALSE
2 points Save Answer
QUESTION 14

The theoretical yield for a chemical reaction can not be calculated until the reaction is completed.

TRUE

FALSE

  1. 👍 0
  2. 👎 0
  3. 👁 1,329
  1. When magnesium metal and an aqueous solution of hydrochloric acid combine, they produce an aqueous solution of magnesium chloride and hydrogen gas. Using the equation, Mg (s) + 2HCl (aq) Imported Asset MgCl2 (aq) + H2 (g), if 72.9 g of Mg and 146.0 g of HCl are allowed to react, identify the limiting reagent.

    Mg

    HCl

    MgCl2

    H2

    I assume imported asset means arrow. You can write an arrow a little easier like this. --> or ==> or >>>.
    Mg + 2HCl ==> MgCl2 + H2
    mols Mg = grams/atomic mass = 72.9/24.3 = 3
    mols HCl = 146/35.5 = 4.12
    If Mg is the limiting reagent (LR) all of it will be used. How much HCl is needed? That will be
    mols HCl needed = 3 mol Mg x (2 mols HCl/1 mol Mg) = 6 mols HCl. You don't have that much HCl; therefore, Mg can't be the LR which means HCl must be the LR. I always like to check that to see that I didn't make an error. So now we ask ourselves if HCl is the LR, all of it will be used. How much Mg is needed? That's
    4.12 mols HCl x (1 mol Mg/2 mols HCl) = 4.12 x 1/2 = 2.06 mols Mg needed. Do you have that much Mg. Yes, so HCl is the LR, all of it will be used, and some of the Mg will be used but some will be left unreacted. Mg is the reagent in excess.

    1. 👍 0
    2. 👎 0
  2. Question 8 is the same kind as the first one you posted. Work it the same way.
    For the others, posting multiple questions with one posts USUALLY results in nothing being answered because it takes too much time for a single post. You might consider posting these as single posts; however, I SUGGEST YOU SHOW HOW YOU THINK EACH SHOULD BE SOLVED OR TELL US EXACTLY WHAT YOU DON'T UNDERSTAND.

    1. 👍 0
    2. 👎 1
  3. tu tas muy loko

    1. 👍 0
    2. 👎 1
  4. Listen here! Yall should solve this question right without having any problems! Because I need this for myself...

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Using the activity series, write a balanced chemical equation for the following reactions: 1. iron metal is added to a solution of copper (II) nitrate 2. zinc metal is added to a solution of magnesium sulfate 3. hydrobromic acid

  2. Chemistry

    Aqueous sulfurous acid H2SO3 and aqueous sodium chloride are formed by the reaction of aqueous sodium sulfite Na2SO3 and aqueous hydrochloric acid HCl . Write a balanced chemical equation for this reaction.

  3. general chem

    Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write NR. (a) Nickel metal is added to a solution of copper (II) nitrate; (b) a solution of zinc

  4. chem

    What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate? (: Begin by writing a balanced equation for the reaction between aqueous sodium bicarbonate and aqueous hydrochloric acid.)

  1. chemistry

    When an aqueous solution suspected of containing Ba2+ or Pb2+ or both are mixed with sulfuric acid a precipitate forms. in another test, when the original solution is mixed with an aqueous solution of sodium sulfide no precipitate

  2. Chemistry

    A 19.9mL volume of a hydrochloric acid solution reacts completely with a solid sample of magnesium carbonate, producing 183mL of CO2 that is collected over water at 24.0 degrees C and 738 torr total pressure. The vapor pressure

  3. Chemistry

    Which one of the following pairs of 0.100 mol L-1 solutions, when mixed, will produce a buffer solution? A. 50. mL of aqueous CH3COOH and 25. mL of aqueous CH3COONa B. 50. mL of aqueous CH3COOH and 25. mL of aqueous HCl C. 50. mL

  4. chem

    what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing traces of acid? is it that aqueous sodium carbonate is extremely combustible, which can't be exposed

  1. Chemistry

    If we want to prepare 125 mL of a 1.245 M aqueous KCl solution from a 7.134 M aqueous KCl solution, how many mL of the 7.134 M solution (rounded with correct number of significant figures) will we need to put in the new solution?

  2. chem lab

    when an aqueous solution suspected of containing BA2+ or Pb2+ or both is mixed with sulfuric acid a precipitate forms. In another test, when the original solution is mixed with an aqueous solution of sodium sulfide no precipitate

  3. chemistry

    When aqueous solutions of potassium hypochlorite and nitric acid are mixed, an aqueous solution of potassium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction. Use H+ for the hydronium ion.

  4. Chemistry

    Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 13.2 mL of a 3.00 M solution of hydrochloric acid and collect all of the hydrogen in a

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