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
sesenic [268]
2 years ago
11

How do you Calculate the molarity of 250 ml of solution in which 2.7 g of MgCl2 are dissolved

Chemistry
1 answer:
IRINA_888 [86]2 years ago
3 0

Answer:

Molar mass of MgCl2 is 95 g/mol

Mg = 24 g/mol and Cl = 35.5 ×2 = 71 g/mol

moles = mass given/ molar mass

= 2.7/95 = 0.028 mol

volume = 250/1000 = 0.25 dm3 (ml is the same as dm3)

molarity of MgCl2 = moles/volume

= 0.028/0.25

= 0.112 mol/dm3

You might be interested in
What is your dream job or ideal lifestyle?
blondinia [14]
My dream job is to create my own business and become my own boss
7 0
3 years ago
If 45.0 mL of a 0.0500 M HNO3, 10.0 mL of a 0.0500 M KSCN, and 30.0 mL of a 0.0500 M Fe(NO3)3 are combined, what is the initial
jeka94

Answer:

the  initial concentration of SCN- in the mixture is 0.00588 M

Explanation:

The computation of the initial concentration of the SCN^- in the mixture is as follows:

As we know that

KSCN \rightarrow K^ + SCN^-

As it is mentioned in the question that KSCN is present 10 mL of 0.05 M

So, the total milimoles of SCN^- is

= 10 × 0.05

= 0.5  m moles

The total volume in mixture is

= 45 + 10 + 30

= 85 mL

Now the initial concentration of the SCN^- is

= 0.5 ÷ 85

= 0.00588 M

hence, the  initial concentration of SCN- in the mixture is 0.00588 M

5 0
3 years ago
A chemical reaction occurs when a solution is formed. True or false
Zolol [24]

Your answer would be False

3 0
3 years ago
Read 2 more answers
A rooster laid an egg on top of the barn roof. Which way did it roll?
PtichkaEL [24]
IT DIDN'T ROLL ROOSTERS CAN LAY EGGSS AHHH
3 0
3 years ago
Read 2 more answers
the elements in group 2 have similar chemical properties because each atom of these elements has the same
Vsevolod [243]
They have same electronic configuration
3 0
3 years ago
Other questions:
  • What kind of scientist would study how mistletoe harms trees?
    5·1 answer
  • The air in a hot-air balloon at 763 torr is heated from 14.0°C to 31.0°C. Assuming that the moles of air and the pressure remain
    5·1 answer
  • What is a decay series?
    10·2 answers
  • (c) O2 gas is transferred from a 3 L vessel containing oxygen at 4 atm to an evacuated 20 L vessel at a constant temperature of
    7·1 answer
  • A chemical compound once used as a propellant in aerosol sprays is called
    14·1 answer
  • Suggest why helium can be used as a carrier gas but oxygen cannot.
    14·2 answers
  • 1. Determinati masa moleculara, raportul atomic si raportul de masa pentru oxidul de aluminiu 2. Determinati compozutia procebtu
    5·1 answer
  • Hello, I really need help in this. I don't understand. :(
    11·2 answers
  • The reproductive organs of the male
    11·2 answers
  • On combustion of 0.2 gm of organic compound gave 0.147g of CO2, 0.12g of H2O and 74.6 ml of nitrogen gas at STP. Find emperical
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!