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
vfiekz [6]
3 years ago
10

Calculate the molar mass of an unknown solid (assume a non-electrolyte), if 1.35 grams of th esolid was dissolved in 15.0 grams

of dodecanol and caused a freezing point depression of 2.34
Chemistry
1 answer:
zmey [24]3 years ago
5 0
Mass of solid dissolved m1 = 1.35 g
 Mass of dodecanol m2 = 15 g
 Freezing point depression Td= 2.34 C
 Freezing point depression constant for dodecanol K = 2.9 C/mol
 Calculating the molarity of dodecanol m => Td = K x molarity
 => 2.34 = 2.9 x molarity => molarity = 2.34 / 2.9
 Molarity M = 0.807
 We have mass and molarity, calculating for molarity for 15 g solvent
 = 15 x (0.806 / 1000) = 0.0121
 Now calculating the molar mass of solid = m1 / molarity
 => 1.35 / 0.0121 = 111.538
 So the molar mass of the Solid is 111.54

You might be interested in
URGENT!!!! helppp<br><br> convert 22.63 moles of oxygen to volume
Lunna [17]
I
0.5
I hope this helps
Sorry if I’m wrong
3 0
3 years ago
Which element has the electron configuration [Xe] 6s^2 4f^14 5d^10 6p^2?
Damm [24]

LEAD is the element that has this electron configuration

7 0
3 years ago
Read 2 more answers
How much of a sample remains after five half-lives have occurred?
timama [110]

Answer:

1/32 of the original sample

Explanation:

We have to use the formula

N/No = (1/2)^t/t1/2

N= amount of radioactive sample left after n number of half lives

No= original amount of radioactive sample present

t= time taken for the amount of radioactive samples to reduce to N

t1/2= half-life of the radioactive sample

We have been told that t= five half lives. This implies that t= 5(t1/2)

N/No = (1/2)^5(t1/2)/t1/2

Note that the ratio of radioactive samples left after time (t) is given by N/No. Hence;

N/No= (1/2)^5

N/No = 1/32

Hence the fraction left is 1/32 of the original sample.

3 0
3 years ago
Acids containing polyatomic ions are named according to the name of the anion.​ true or false
Ray Of Light [21]

Answer:

true

Explanation:

Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them. For an acid with a polyatomic ion, the suffix “-ate” from the ion is replaced with “-ic.”

5 0
3 years ago
64 g of sulfur dioxide (SO2) contains 32 g of oxygen. Calculate how much sulfur it <br> contains.
Contact [7]

Answer:

32 grams

Explanation:

64 g SO2 - 32g O2= 32g S

8 0
3 years ago
Other questions:
  • If you begin with 2.7 g Al and 4.05 g Cl2, what mass of AlCl3 can be produced?
    9·1 answer
  • Which formed first: hydrogen nuclei or hydrogen atoms?
    15·1 answer
  • Using the phase diagram for H2O, which of the following correctly describes water at 0°C and 1 atm?
    8·2 answers
  • President George Washington’s leadership during
    5·1 answer
  • When the burner in a hot air balloon is turned on, the temperature of the air in the balloon ________ causing its volume to ____
    5·1 answer
  • When a student mixes 50 mL of 1.0 M HCl and 50 mL of 1.0 M NaOH in a coffee-cup calorimeter, the temperature of the resultant so
    14·2 answers
  • Which of the following results in the release of nuclear energy?
    12·2 answers
  • What is one advantage of using a computer over a graphing calculator
    7·2 answers
  • Which of the following changes occurs in the nucleus when a position particle is given off
    5·1 answer
  • A horse gallops along a racecourse at a speed of 40 km/h. It takes the horse 3 minutes to run the length of the track.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!