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
netineya [11]
2 years ago
14

How many atoms are there in 2.0 moles of magnesium (Mg)?

Chemistry
1 answer:
hjlf2 years ago
7 0

Answer:

It should be 1. 1.2 X 10^24

Explanation:

You might be interested in
Gallium is produced by the electrolysis of a solution made by dissolving gallium oxide in concentrated NaOH ( aq ) . Calculate t
Sedbober [7]

Answer:

Approximately 6.30\times 10^{-3}\;\rm mol.

Explanation:

The gallium here is likely to be produced from a \rm NaGaO_2\, (aq) solution using electrolysis. However, the problem did not provide a chemical equation for that process. How many electrons will it take to produce one mole of gallium?

Note the Roman Numeral "\mathtt{(III)}" next to \rm Ga.  This numeral indicates that the oxidation state of the gallium in this solution is equal to +3. In other words, each gallium atom is three electrons short from being neutral. It would take three electrons to reduce one of these atoms to its neutral, metallic state in the form of \rm Ga\, (s).

As a result, it would take three moles of electrons to deposit one mole of gallium atoms from this gallium \mathtt{(III)} solution.

How many electrons are supplied? Start by finding the charge on all the electrons in the unit coulomb. Make sure all values are in their standard units.

t = \rm 80.0\; min = 80.0\; min \times 60\;s \cdot min^{-1} = 4800\; s.

Q = I \cdot t = \rm 0.380 \; A \times 4800 \; s = 1.824\times 10^3\; C.

Calculate the number of electrons in moles using the Faraday's constant. This constant gives the size of the charge (in coulombs) on each mole of electrons.

\begin{aligned} n(\text{electrons}) &= \frac{Q}{F} \cr &= \rm \dfrac{1.824\times 10^3\; C}{96485.332\; C \cdot mol^{-1}}\cr &\approx \rm 1.89\times 10^{-2}\; mol \end{aligned}.

It takes three moles of electrons to deposit one mole of gallium atoms \rm Ga\, (s). As a result, \rm 1.89\times 10^{-2}\; mol of electrons would deposit \displaystyle \rm \frac{1}{3}\times 1.89\times 10^{-2}\; mol \approx 6.30\times 10^{-3}\; mol of gallium atoms \rm Ga\, (s).

8 0
3 years ago
A precipitate is a solid that sometimes forms when two liquids combine.<br> A true <br> B False
r-ruslan [8.4K]
<h2>Question:</h2>

A precipitate is a solid that sometimes forms when two liquids combine.

<h2>Answer:</h2>

<u>A</u><u>.</u><u> </u><u>True</u><u> </u>

<h2>Explanation:</h2>
  • <u>Because</u><u> </u><u>the</u><u> </u><u>Precipitate</u><u> </u><u>it's</u><u> </u><u>forms</u><u> </u><u>solid</u><u> </u><u>when</u><u> </u><u>two</u><u> </u><u>liquids</u><u> </u><u>combine</u><u> </u><u>to</u><u> </u><u>precipitate</u><u>.</u><u> </u>

<h2><u>#CARRYONLEARNING</u><u> </u></h2><h2><u>#STUDYWELL</u><u> </u></h2>
3 0
3 years ago
Read 2 more answers
3/4(x-2)=x-1 please answer me ​
Elan Coil [88]

Answer:

-2

Explanation:

3/2 (x-2) = x-1

<=> 3/4 x - 3/2 = x-1

<=> 3/4 x - x = 3/2 -1

<=> -1/4 x =1/2

<=> x= -2

3 0
3 years ago
Read 2 more answers
CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
Effectus [21]

Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time

Explanation:

8 0
3 years ago
Check this if it’s right
FromTheMoon [43]

Answer: yes its right

Explanation:

3 0
3 years ago
Other questions:
  • What is scientific notation
    11·1 answer
  • Which of these reactions can be classified as double replacement reactions?
    9·1 answer
  • Why was the Copernicus discovery called the Copernican revolution A. It caused a big fight in the scientific community B. It con
    12·1 answer
  • Give an example of a balanced force.
    12·2 answers
  • Pls big test What are openings in the ground that release energy from deep inside the planet? * 1clouds 2volcanoes 3sun 4hurrica
    6·1 answer
  • 1. What is the equality between mL and L?
    6·1 answer
  • How many grams of water are produced if 3.2 moles of hydrogen reacts
    5·1 answer
  • Barium bromide dissolves in water. Which statement is true?
    13·1 answer
  • Which two statements about redox reactions are true?
    5·2 answers
  • PLS HELP! WILL MARK BRAINLIEST!!! 50 PTS
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!