1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
baherus [9]
3 years ago
8

Balance the chemical equation given below, and determine the number of grams of MgO that are needed to produce 20.0 g of Fe2O3.

_____ MgO(s) _____ Fe(s) _____ Fe2O3(s) _____ Mg(s)
Chemistry
1 answer:
Alenkasestr [34]3 years ago
7 0

Answer:

1.) The balanced equation is    3MgO(s) +  2Fe(s) ===> Fe2O3(s) + 3Mg(s)

2.) 20g of Fe2O3 will be produced by 20 ×120/160 = 15g of MgO

Explanation:

THE CORRECT EQUATION IS: MgO(s) + ___ Fe(s)  ===> Fe2O3(s) + ___ Mg(s)

The balanced equation is: 3MgO(s) +  2Fe(s) ===> Fe2O3(s) + 3Mg(s)

molar mass of 3MgO = 3(24 + 16) = 120

Molar mass of Fe2O3 = 2 X 56 + 3 X 16

                                    =112 +48 =160

From the equation, 120g of MgO Produced 160g of Fe2O3

Therefore 20g of Fe2O3 will be produced by 20 ×120/160 = 15g of MgO.

You might be interested in
In an ecosystem, what do organisms and populations with similar needs compete<br>over?​
hram777 [196]

Answer:

In any ecosystem, organisms and populations with similar requirements for food, water, oxygen, or other resources may compete with each other for limited resources, access to which consequently constrains their growth and reproduction. Growth of organisms and population increases are limited by access to resources.

5 0
3 years ago
CaO + H2O -&gt; Ca(OH)2
yawa3891 [41]

The % yield of Ca(OH)₂ : 62.98%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

Reaction

CaO + H₂O ⇒ Ca(OH)₂

mass CaO= 4.2 g

mol CaO(MW=56,0774 g/mol) :

\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{4.2}{56,0774 g/mol}\\\\mol=0.075

mol Ca(OH)₂ based on mol CaO

mol ratio CaO : Ca(OH)₂,= 1 : 1, so mol Ca(OH)₂ = 0.075

mass Ca(OH)₂(MW=74,093 g/mol) ⇒ theoretical

\tt mass=mol\times MW\\\\mass=0.075\times 74,093 g/mol\\\\mass=5.557~g

% yield :

\tt =\dfrac{actual}{theoretical}\times 100\%\\\\=\dfrac{3.5}{5.557}\times 100\%\\\\=62.98\%

8 0
2 years ago
Although chemical digestion occurs throughout the digestive system, it mostly occurs in the A esophagus and stomach
blagie [28]
D: stomach and intestines :)
5 0
3 years ago
Hi people just saying if you think your life is hard just remember other people have it way worse then you
Serhud [2]

i mean my mom takes all my electronics at night.

6 0
3 years ago
What is the mass of 5.130 moles of Table salt, sodium chloride (NaCl)
mina [271]

<em>The answer is 58.44277</em>

5 0
3 years ago
Other questions:
  • Alkanes are unreactive except in _____ reactions.
    11·1 answer
  • A student prepares a 0.28 M solution of acetic acid. If the Ka of the acid is 1.76 x 10^-5, then what is the pH of the solution?
    12·1 answer
  • Which particle has two positive charge and an electron arrangement of 2, 8?
    7·1 answer
  • Can rocks include organic materials, but minerals cannot true or false
    5·1 answer
  • H2O
    5·2 answers
  • Would the glove, the block of wood, and the glass place stay the same temperature?
    6·1 answer
  • Which of the following statements is true?
    6·1 answer
  • When sugar is dissolved in hot tea, physical changes occur. Write two physical properties of sugar
    13·1 answer
  • Which isomer of 1-bromo-2-tert-butylcyclohexane reacts faster when refluxed with potassium tert-butoxide?Draw the structure of t
    15·1 answer
  • Gasoline has a density of 0.749 g/mL . There are 454 grams in a pound and 3.7854 L in a gallon. How many Pounds does 19.2 gallon
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!