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
jonny [76]
3 years ago
11

Vhat is the molarity of an Nal solution that contains 7.0 g of Nal in 23.0 mL of solution?

Chemistry
1 answer:
Alika [10]3 years ago
4 0

Answer:

Molarity = 5.22 M

Explanation:

Given data:

Mass of sodium chloride = 7.0 g

Volume of solution = 23.0 mL ( 23.0/1000 = 0.023 L)

Molarity = ?

Solution;

Number of moles of NaCl = 7.0 g/ 58.4 g/mol

Number of moles of NaCl = 0.12 mol

Molarity = moles of solute / volume in litter

Molarity = 0.12 mol /  0.023 L

Molarity = 5.22 M

You might be interested in
Complete and balance the following redox reaction in basic solution
inn [45]

Answer:

balanced in ACID not BASE

Cr2O7^2-(aq) +3Hg(l) +14 H^1+ ----> 3Hg^2+ + 2Cr^3+(aq) + 7H2O

Answer

Cr2O7^2-(aq) +3Hg(l) +14 H^1+ ----> 3Hg^2+ + 2Cr^3+(aq) + 7H2O

Explanation:

Cr2O7^2-(aq) + Hg(l) ----> Hg^2+(aqH) + Cr^3+(aq)

add H^1+ (acid) to capture the O and make 7 water molecules

Cr2O7^2-(aq) + Hg(l) + H^1+ ----> Hg^2+(aqH) + Cr^3+(aq) + 7H2O

Cr goes from +6 to +3 by gaining 3 e

Hg goes from 0 to +2 by losing 2 e

we need 3 Hg for every 2 Cr

so

Cr2O7^2-(aq) +3Hg(l) +14 H^1+ ----> 3Hg^2+ + 2Cr^3+(aq) + 7H2O

2 Cr on the right and left

Net 12 positive charges on the right and the left

3 Hg on the right and left

14 H on the right and left

the equation is balanced

we cannot balance the equation in a basic solution with OH^1-

we have plenty of O in the dichromate ion. we need to convert it to water which take free H^1+ from the acid

8 0
3 years ago
Explain why is sodium less reactive than potassium
leva [86]

Answer:

As potassium is larger than sodium, potassium's valence electron is at a greater distance from the attractive nucleus and is so removed more easily than sodium's valence electron. As it is removed more easily, it requires less energy, and can be said to be more reactive.

Explanation:

<em>Hope you're having a splendiferous day</em><em>.</em>

<em>Just a bored kid willing to help...</em>

8 0
3 years ago
1
creativ13 [48]
A.chloroplast
Chloroplasts performs photosynthesis during daylight hours
6 0
3 years ago
Read 2 more answers
For the chemical equation SO 2 ( g ) + NO 2 ( g ) − ⇀ ↽ − SO 3 ( g ) + NO ( g ) the equilibrium constant at a certain temperatur
Ipatiy [6.2K]

Answer : The number of moles of NO_2 gas added must be, 1.59 moles.

Explanation :

Equilibrium constant : It is defined as the equilibrium constant. It is defined as the ratio of concentration of products to the concentration of reactants.

The equilibrium expression for the reaction is determined by multiplying the concentrations of products and divided by the concentrations of the reactants and each concentration is raised to the power that is equal to the coefficient in the balanced reaction.

The given equilibrium reaction is,

                        SO_2(g)+NO_2(g)\rightleftharpoons SO_3(g)+NO(g)

Initial conc.    2.86               x             0          0

At eqm.       (2.86-1.30)    (x-1.30)     1.30     1.30

The expression of K_{eq} will be,

K_{eq}=\frac{[SO_3][NO]}{[SO_2]NO_2]}

Now put all the given values in this expression, we get:

3.70=\frac{(1.30)\times (1.30)}{(2.86-1.30)\times (x-1.30)}

x=1.59

Thus, the number of moles of NO_2 gas added must be, 1.59 moles.

4 0
3 years ago
The period that an element is in on the periodic table can tell you how many _____ the element’s atom have.
Murljashka [212]

Answer: It's D

Explanation:

7 0
2 years ago
Other questions:
  • An alloy contains 59g of pure silver and 19g of pure copper. What is the silver in the alloy
    12·1 answer
  • 3) How many moles of solute are dissolved in 1.5 L of a 0.80 M solution? * 10 points
    10·1 answer
  • Number of valence electrons in sulfur
    13·1 answer
  • If volumes are additive and 253 mL of 0.19 M potassium bromide is mixed with 441 mL of a potassium dichromate solution to give a
    7·1 answer
  • A molecule of ethyl alcohol is converted to acetaldehyde in one’s body by zero order kinetics. If the concentration of alcohol i
    14·1 answer
  • Find three acids and three bases used in your home.
    15·1 answer
  • Why do you think we have different seasons?
    15·1 answer
  • PLEASE HELPP FOR THE LIFE OF ME
    8·2 answers
  • How can you identify that the given substance is a metal or nonmetal​
    10·1 answer
  • Please look at image. the green colored blocks indicate the..
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!