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
Sergio039 [100]
3 years ago
6

Which equation shows how to calculate how many grams (g) of KOH would be needed to fully react with 4 mol Mg(OH)2? The balanced

reaction is:. MgCl2 + 2KOH Mg(OH)2 + 2KCl
Chemistry
2 answers:
vivado [14]3 years ago
8 0

<u>Answer:</u> The mass of KOH will be 448 grams.

<u>Explanation:</u>

For the given chemical reaction:

MgCl_2+2KOH\rightarrow Mg(OH)_2+2KCl

By Stoichiometry of the reaction:

1 mole of magnesium chloride reacts with 2 moles of potassium hydroxide.

So, 4 moles of magnesium chloride will react with = \frac{2}{1}\times 4=8mol of potassium hydroxide.

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}  

Moles of potassium hydroxide = 8 mol

Molar mass of potassium hydroxide = 56 g/mol

Putting values in above equation, we get:

8mol=\frac{\text{Mass of KOH}}{56g/mol}\\\\\text{Mass of KOH}=448g

Hence, the mass of KOH will be 448 grams.

bazaltina [42]3 years ago
3 0
Mole ratio:

MgCl₂ + 2 KOH = Mg(OH)₂ + 2 KCl

2 moles KOH ---------------- 1 mole Mg(OH)₂
moles KOH ------------------- 4 moles Mg(OH₂)

moles KOH = 4 x 2 / 1

= 8 moles of  KOH

molar mass KOH = 56 g/mol

mass of KOH = n x mm

mass of  KOH = 8 x 56

= 448 g of KOH 

hope this helps!

You might be interested in
Which describes the path of energy that a gas powered car uses to drive along a road?
harkovskaia [24]

Answer:

mechanical energy to electrical energy to light energy

4 0
3 years ago
Can two organisms belong to the same family but different classes? Explain.
slega [8]
This information is correct. This is because the order of classification is domain, kingdom, phylum, class, order, family, genus, species. Since class comes before family, the two organisms could be in the same class, but then when you specify further, they could be in different families.
7 0
3 years ago
HELP ASAP!! FILL IN THE BLANKS! will be brainliest!!!
Ludmilka [50]

Answer:

Don't mark me brainliest because of this but I'm pretty sure your supposed to give us the words because teachers don't give you things like that without the words you will the answer in with.

4 0
3 years ago
Read 2 more answers
Nitrous oxide (n2o), or laughing gas, is commonly used as an anesthetic in dentistry and surgery. how many moles are present in
Gelneren [198K]

Answer is: 0.375 moles are present in 8.4 liters of nitrous oxide at stp.

V(N₂O) = 8.4 L.

V(N₂O) = n(N₂O) · Vm.

Vm = 22,4 L/mol.<span>
n</span>(N₂O) = V(N₂O) ÷ Vm.

n(N₂O) = 8.4 L ÷ 22.4 L/mol.

n(N₂O) = 0.375 mol.<span>
Vm - molare volume on STP.</span>

5 0
3 years ago
2
Alina [70]

Answer:

N - 1s²2s²2p³

Explanation:

Nitrogen is located in the p-block of the periodic table (groups 13-18) and is on the 2nd period.

The 2nd period tells us the principal energy level (a quantum number) is n = 2. Therefore, it must have already filled up the 1s sublevel.

The groups 13-18 on period 2 tells us that the 2s sublevel is also filled.

Nitrogen is located in Group 15. That means that there are 3 electrons that have filled the 2p sublevel, out of a possible 6.

Therefore, our electron configuration is 1s²2s²2p³

2p³ (Shorthand Config)

[He] 2s²2p³ (Noble Gas Config)

7 0
3 years ago
Other questions:
  • Consider the following reaction at equilibrium: 2NH3 (g) N2 (g) + 3H2 (g) Le Châtelier's principle predicts that the moles of H2
    7·1 answer
  • 1.2 g of sucrose is added to water with the final volume of 75 ml. What is the concentration of sucrose in %w/v?
    14·1 answer
  • How much mass do 2.0 moles of uranium contain
    8·1 answer
  • HELP ME PLS!! I FORGOT TO STUDY Which may result from an increase in friction?
    8·2 answers
  • Fill in the blanks. SPELLING COUNTS!!
    7·1 answer
  • How many grams would 6.02 x 10^23 atoms of Ca be?
    7·2 answers
  • Chemical formurla for Lithium Phsophide
    5·1 answer
  • Please help me i need yall will mark brainliest and 30 points!
    12·1 answer
  • What is the balanced chemical equation for the reaction of sodium and oxygen?Na + O to NaO2Na + O2 to 2 NaO4Na + O2 to 2Na2ONa +
    5·1 answer
  • NEED HELP ASAP!!
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!