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
kobusy [5.1K]
3 years ago
12

A chemist prepares a solution of magnesium fluoride (MgF_2), by measuring out 0.031 g of magnesium fluoride into a 250. mL. Volu

metric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist magnesium fluoride solution. Round your answer to 2 significant digits. _____ mol/l.
Chemistry
1 answer:
AleksAgata [21]3 years ago
3 0

Answer:

The concentration of the magnesium fluoride solution is 0.0020 M

Explanation:

Step 1: Data given

Mass of MgF2 = 0.031 grams

volume = 250 mL = 0.250 L

Molar mass of MgF2 = 62.3 g/mol

Step 2: Calculate moles

Moles MgF2 = mass MgF2 / molar mass MgF2

Moles MgF2 = 0.031 grams / 62.3 g/mol

Moles MgF2 = 4.98 *10^-4 moles

Step 3: Calculate concentration of MgF2

Concentration MgF2 = moles MgF2 / volume

Concentration MgF2 = 4.98 *10^-4 / 0.250 L

Concentration = 0.0020 M

The concentration of the magnesium fluoride solution is 0.0020 M

You might be interested in
How can we find the volume of this fish tank? Please I needed but Good
lawyer [7]
Volume well in the picture the fish tank seems to be a rectangle, so you would do V=length x width x height. So V=5x3x3=45
3 0
3 years ago
Read 2 more answers
Plz help :(
ziro4ka [17]
<h2>Answer:0.5 moles,1 mole</h2>

Explanation:

Sr(NO_{3})_{2} is readily soluble in water.

Sr(NO_{3})_{2} dissolves in water to give Sr^{2+} ions and NO_{3}^{-} ions.

The reaction is

Sr(NO_{3})_{2}→Sr^{2+}+2NO_{3}^{-}

So,1 mole of Sr(NO_{3})_{2} gives 1 mole of Sr^{2+} and 2 moles of NO_{3}^{-}.

So,0.5 moles of Sr(NO_{3})_{2} gives 0.5 moles of Sr^{2+} and 1 mole of NO_{3}^{-}.

5 0
3 years ago
For each element, predict where the "jump " occurs for successive ionization energies. (For example, does the jump occur between
vichka [17]

Answer:

A jump occurs when a core electron is removed.

Explanation:

A jump in ionization energy occurs when a core electron is removed. A large jump in the ionization energy easily be seen from the electronic configuration of an element.

For Beryllium, the electronic configuration of is 1s2 2s2.

There are two valence electrons in the outermost shell hence the ionization energy data for beryllium will show a sudden jump or increase in going from the second to the third ionization energy owing to the removal of a core electron

The electronic configuration for Nitrogen is 1s2 2s2 2p3. Five valence electrons are found in the outermost shell so the ionization energy data for nitrogen will show a sudden jump or increase in going from the fifth to sixth ionization energy because of the removal of a core electron

The electronic configuration of oxygen is 1s2 2s2 2p4. There are six valence electrons hence ionization energy for oxygen atom will show a sudden jump or increase in going from the sixth to the seventh ionization energy because of the removal of a core electron

The electronic configuration of Lithium is 1s2 2s1

There is one valence electron in its outermost shell so its ionization energy data will show a sudden jump or increase in going from the first to the second ionization energy because of the removal of a core electron.

8 0
3 years ago
I need some chem help :(
alexandr402 [8]
Hi, can you post what you need help with??
7 0
3 years ago
With respect to NO and For the reaction NO + O 3 NO 2 + O 2 , the reaction was expressing concentrations as molarityare the unit
Sliva [168]

Answer:

CXbxcbfvbdffdffzsarg

Explanation:

6 0
3 years ago
Other questions:
  • Explain what happens to energy and matter during a chemical reaction.
    15·1 answer
  • What is the mass in grams of 16.3 mol of the element<br> nickel, Ni?
    7·1 answer
  • A) which substances are the products? ______________________________
    7·1 answer
  • What would happen to Earth’s tides if the distance between Earth and the Moon increased?
    12·2 answers
  • A soild reactant is placed in to a beaker of warm water. The liquid vigorously bubbles as the solid dissolves into the solution.
    7·1 answer
  • Sometimes a nuclide is referenced by the name of the element followed by the:______
    9·1 answer
  • Why organic compounds recrystallized when produced​
    7·1 answer
  • PLEASE HELP me create a fictional video game using at least 2 of the ecological roles. (roles to choose from: decomposer, detrit
    12·1 answer
  • A 3.8 g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.8 g. The two substances react, rel
    6·1 answer
  • Can a substance be a Lewis acid without being a Bronsted-Lowry acid?<br> Please argue on it
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!