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
Svetlanka [38]
3 years ago
11

I need help with number 8 please help ASAP.

Chemistry
1 answer:
Rzqust [24]3 years ago
8 0

Answer:

33.33% = 33%

Explanation:

MgCO3(s) + 2HCl (aq) --> MgCl2(aq) + H20(l) + CO2(g)

1 mole of MCO3 will produce → 1 mole of CO2

We need to get the number of mole of CO2:

and when we have 0.22 g of CO2, so number of mole = mass / molar mass

Moles = 0.22 g / 44 g/mol = 0.005 mole

Moles of Mg = moles of CO2 = 0.005 mole

Mass of Mg = moles * molar mass

= 0.005 * 84 /mol = 0.42 g

Percent of MgCO3 by mass of Mg = 0.42 g / 1.26 * 100

=33.33 %

You might be interested in
What is the difference between potential and kinetic energy
erik [133]
Potential energy<span> is the stored </span>energy<span> in an object due of its position or its configuration where as </span>Kinetic energy<span> is the </span>energy<span> which a body possesses because of its motion.</span>
4 0
3 years ago
Read 2 more answers
What name should be used for the ionic compound Cu(NO3)2
Sergeu [11.5K]
<span>Copper(II) nitrate. Hope i cleared your doubt</span>
6 0
2 years ago
Read 2 more answers
Acts as the digestive system inside a cell. It helps to break down old or unneeded parts of the cell, and substances that have b
DIA [1.3K]

Answer:

I think it is enzymes

Explanation:

5 0
3 years ago
Is a flashlight turned on kinetic or potential energy ?
kompoz [17]
Answer: potential energy













8 0
3 years ago
What types of chemical<br> reactions can change a toxic<br> chemical into one that is less<br> toxic
Masteriza [31]

Answer:

Very toxic materials are substances that may cause significant harm or even death to an individual if even very small amounts enter the body.There are a number of very toxic materials that may be used in workplaces. Some examples include carbon monoxide, hydrogen sulfide, chlorine and sodium cyanide

Explanation:

here are generally four types of toxic entities; chemical, biological, physical and radiation: Chemical toxicants include inorganic substances such as, lead, mercury, hydrofluoric acid, and chlorine gas, and organic compounds such as methyl alcohol, most medications, and toxins.

8 0
2 years ago
Other questions:
  • A newton is used to measure force.<br><br> True or False?
    14·1 answer
  • Given that the vapor pressure of water is 17.54 torr at 20 °c, calculate the vapor-pressure lowering of aqueous solutions that a
    6·1 answer
  • What volume will 35.9 g of hydrogen gas (H2) occupy at STP?
    11·2 answers
  • Gold has a density of 19.3 g/cm^3. If you have a
    8·1 answer
  • The amount of heat energy required to raise the temperature of a unit mass of a material one degree is
    8·1 answer
  • An experiment requires that each student use an 8.5 cm length of magnesium ribbon. How many students can do the experiment if th
    12·2 answers
  • A 5.325g sample of methyl benzoate, a compound in perfumes , was found to contain 3.758 g of carbon, 0.316 g of hydrogen, and 1.
    6·1 answer
  • Think of the different types of reactions you have learned about. How can you tell if they absorb energy or release energy, and
    5·1 answer
  • What type of reaction is shown below?<br>A. hydration reaction <br>B.addition reaction​
    7·1 answer
  • Name the following bases<br> -Ba(OH)2<br> - Ca(OH)2<br> -RbOH
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!