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
lara31 [8.8K]
3 years ago
6

Predict the mole fraction of b in the vapor produced when a mixture of 0.70 mole fraction of a and 0.30 mole fraction of b boils

.
Chemistry
1 answer:
sattari [20]3 years ago
7 0
Mole  fraction  of  a  component  in a solution is  the  ratio  of  the  number   of  moles  of  that  component  to  the  total  number  of  moles  of  all   component  in  a   solution.
total  moles =0.30  +0.70=1.00
mole  fraction  of  b={(0.30  x100)/(1  x100 )}=3/10
                   
You might be interested in
The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the
Ede4ka [16]

Answer:

NH3 is polar due to the bonds between nitrogen and hydrogen which have different electronegativity and due also to its asymmetrical shape.

Explanation:

NH3 is polar as there are 3 dipoles in the ammonia molecule that do not balance each other out.

Considering the N-H bond which is polar because N with an electronegativy of 3.0, is more electronegative than H, with an electronegativity of 2.1. The is overall asymmetrical shape of NH3

means that the dipoles remains unbalanced and do cancel out each other making the NH3 polar.

4 0
3 years ago
How many divisions are used to classify living organisms?<br> a) 5<br> b) 6<br> c) 8<br> d) 7
Nataly_w [17]
Answer:a

Living things are divided into five kingdoms: animal, plant, fungi, protist and monera
4 0
2 years ago
What is easier to observe about an object,it’s physical properties or it’s chemical properties. Explain why.
Sladkaya [172]

Answer:

Physical Properties

Explanation:

You are able to see physical properties but are unable to see chemical properties.

7 0
2 years ago
You have 400 kg of a radioactive substance with a short half-life of 1000 years. how much will be left after these times?
Amiraneli [1.4K]
Half-life of a radioactive substance is the time required to reduce the amount of substance to half of its initial amount. 

In present case, half-life is material is given as 1000 years and initial amount of material is given as 400 kg
 
Answer 1) Since, half-life of radio-active substance is 1000 years, therefore after 1st half life, amount of the material will be left to half the initial amount. Hence, amount of substance left after 1000 years = 400/2 = 200 kg.

Answer 2) For 2000 years, radioactive material has crossed 2 times the half life. Therefore ,  amount of the material will be left to 1/4 the initial amount. Hence, amount of substance left after 2000 years = 400/4 = 100 kg.

Answer 3) 
 For 4000 years, radioactive material has crossed 4 times the half life. Therefore , amount of the material will be left to 1/16 the initial amount. Hence, amount of substance left after 4000 years = 400/16 = 25 kg.
8 0
3 years ago
How to calculate density (what’s the formula) <br> density=_ divided by _
Sphinxa [80]

Answer:

density equals weigt divided by volume

Explanation:

density =  \frac{m}{v}

8 0
3 years ago
Other questions:
  • What is an energy sublevel
    5·1 answer
  • The molar mass of blood sugar, C6H12O6 also known as glucose and dextrose is
    13·1 answer
  • What the volume of 7 mol of hydrogen at stp
    9·1 answer
  • If water were a nonpolar molecule, how would its properties be different?
    10·1 answer
  • Muiltplying 2.5 x 10^10 by 3.5 x 10^-7
    6·1 answer
  • BaO2(s) + 2HCl(aq) → H2O2(aq) + BaCl2(aq) What mass of hydrogen peroxide should result when 1.50 g barium peroxide is treated wi
    7·1 answer
  • How are electrons added to orbitals in an electron configuration?
    8·1 answer
  • The volume of a ball was measured at 500.0 cm?, and its mass was measured to be 404.2 g.
    6·1 answer
  • What is an orbital? This is the question.
    10·1 answer
  • Pls<br> Due today pls help asfast as possible
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!