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
Marta_Voda [28]
3 years ago
7

Un estudiante debe preparar una disolución 2M de NaCl (58,44 g/mol) en un recipiente de 7L. ?Cuántos gramos de NaCl debe agregar

?
Chemistry
1 answer:
Gnesinka [82]3 years ago
3 0

Answer:

818.2 g.

Explanation:

  • Molarity is the no. of moles of solute per 1.0 L of the solution.

<em>M = (no. of moles of NaCl)/(Volume of the solution (L))</em>

<em></em>

M = 2.0 M.

no. of moles of NaCl = ??? mol,

Volume of the solution = 7.0 L.

∴ (2.0 M) = (no. of moles of NaCl)/(7.0 L)

∴ (no. of moles of NaCl) = (2.0 M)*(7.0 L) = 14.0 mol.

  • To find the mass of NaCl, we can use the relation:

<em>no. of moles of NaCl = mass/molar mass</em>

<em></em>

<em>∴ mass of NaCl = (no. of moles of NaCl)*(molar mass) =</em> (14.0 mol)*(58.44 g/mol) = <em>818.2 g.</em>

You might be interested in
What is a neutron and what charge does it have
Gnoma [55]
It’s a polyatomic and it has a negative charge. It’s located in the nucleus of the atom, along with the protons.
5 0
3 years ago
Read 2 more answers
I need help with unit conversion​
saw5 [17]

Answer:

what is it?

Explanation:

you haven't said?

3 0
3 years ago
How much heat must absorbed by the reaction system to convert 100g of NaNO3 into NaHSO4(s)?
Alex787 [66]

Answer:

about 4.8kJ

Explanation:

6 0
3 years ago
The ka values for several weak acids are given below. which acid (and its conjugate base) would be the best buffer at ph = 8.0?
Pie
One of the best buffer choice for pH = 8.0 is Tris with Ka value of  6.3 x 10^-9.

To support this answer, we first calculate for the pKa value as the negative logarithm of the Ka value: 
     pKa = -log Ka

For Tris, which is an abbreviation for 2-Amino-2-hydroxymethyl-propane-1,3 -diol and has a Ka value of 6.3 x 10^-9, the pKa is
     pKa = -log Ka
            = -log (6.3x10^-9)
            = 8.2

We know that buffers work best when pH is equal to pKa:
     pKa = 8.2 = pH 

Therefore Tris would be a best buffer at pH = 8.0.
7 0
3 years ago
Read 2 more answers
How do you solve for x?​
Ad libitum [116K]

Answer:

substitution is the best method or collecting like terms

Explanation:

3 0
3 years ago
Other questions:
  • What evidence have u collected to explain the relationship between the Moon's revolution and lunar phrase?
    15·1 answer
  • What is the equilibrium membrane potential due to na ions if the extracellular concentration of na ions is 142 mm and the intrac
    9·1 answer
  • An acidic solution could have a pH of
    13·1 answer
  • 2. A sample of neon gas has a volume of 87.6 L at STP. How many moles are present?
    6·1 answer
  • Please help me and get me the right answer
    10·1 answer
  • Why does nitrogen have the lowest volume in the atmosphere on average?
    10·1 answer
  • 3. If an item of trash is described as highly biodegradable, is that a physical property or
    10·1 answer
  • What is space biology?? <br>​
    13·1 answer
  • 3. Two people are playing tug of war. One person pulls to the right with 32 N of force. The other person pulls to the left with
    9·1 answer
  • 1) In the image below, determine the temperature in Fahrenheit.*
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!