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
antiseptic1488 [7]
3 years ago
8

How many grams of mgo are produced during an enthalpy change of -233 kj ?

Chemistry
1 answer:
TEA [102]3 years ago
6 0
Chemical reaction: 2Mg + O₂ → 2MgO. ΔH = -1204 kJ.
ΔH(reaction) = -233 kJ.
From chemical reaction we can se that two moles of magnesium oxide produce -1204 kJ, make proportion:
2 mol : -1204 kJ = n(MgO) : -233 kJ.
n(MgO) = 0,387 mol.
m(MgO) = n(MgO) · M(MgO).
m(MgO) = 0,387 mol · 40,3 g/mol.
m(MgO) = 15,596 g.
You might be interested in
What were the four elements that ancient Greeks believed to exist
ruslelena [56]

Answer:

The ancient Greeks believed in the four elements of air, earth, fire, and water. The Greek philosopher Empedocles is known for originating the theory of these classic four elements being the basis of all things.

4 0
3 years ago
Which of the following statements best describes why a solution of 6.00 g of Ca(NO3)2?in 30.0 g of water has a greater boiling-p
sukhopar [10]
Boiling-point elevation is a colligative property.

That means, the the boiling-point elevation depends on the molar content (fraction) of solute.

The dependency is ΔTb = Kb*m

Where ΔTb is the elevation in the boiling point, kb is the boiling constant, and m is the molality.

A solution of 6.00 g of Ca(NO3) in 30.0 g of water has 4 times the molal concentration of a solution of 3.00 g of Ca(NO3)2 in 60.0 g of water.:

(6.00g/molar mass) / 0.030kg = 200 /molar mass
(3.00g/molar mass) / 0.060kg =   50/molar mass

=> 200 / 50 = 4.

Then, given the direct proportion of the elevation of the boiling point with the molal concentration, the solution of 6.00 g  of CaNO3 in 30 g of water will exhibit a greater boiling point elevation.

Or, what is the same, the solution with higher molality will have the higher boiling point.
5 0
3 years ago
por favor es urgente!!!!!!!!.... 1 -¿cuántos átomos- gramos de cloro hay en 88,75 g de dicho elemento? 2-¿calcular los moles de
Mamont248 [21]

Answer:

don't understand your language

6 0
3 years ago
You are given a bottle of solid X and three aqueous solutions of X—one saturated, one unsaturated, and one supersaturated. How w
quester [9]

In a saturated solution, extra solid X would remain solid, dissolve in an unsaturated solution, and crystallize in a supersaturated one.

A solution is said to be saturated when there is a maximum amount of solute present that has been dissolved in the solvent. As a result, the system is in an equilibrium between the dissolved and undissolved solutes: A solution is considered to be unsaturated if the solute concentration is less than the equilibrium solubility. A supersaturated solution is one that has more solute than is necessary to generate a saturated solution at a given temperature.

Learn more about Supersaturated here-

brainly.com/question/16817894

#SPJ4

5 0
2 years ago
When representative elements form ionic compounds which elements achieve full octets?
Viktor [21]

Answer:

nonmetals

Explanation:

nonmetals nonmetals receive more because metals are much harder to gain than nonmetals.

7 0
3 years ago
Other questions:
  • What was the advantageous adaptation mentioned that humans have evolved in order to survive
    14·1 answer
  • In a sedimentary rock, small rounded particles indicate a A) long distance and long travel time. B) long distance and short trav
    11·1 answer
  • Combustion analysis of toluene, a common organic solvent, gives 5.86 mg of co2 and 1.37 mg of h2o. if the compound contains only
    7·2 answers
  • Which action best demonstrates the transformation of mechanical energy to heat energy?
    5·2 answers
  • Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky
    5·2 answers
  • Each answer below describes the connectivity around a single atom.
    14·1 answer
  • when your tires heat up from driving on a hot road the pressure inside of them increase. this is an example of which gas law
    8·1 answer
  • How many grams are in 2.30 x 10^23 atoms in Na?
    9·1 answer
  • When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the
    8·1 answer
  • Nitrogen gas was collected by water displacement. What was pressure of the N, collected if the temperature was 22 °C?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!