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
telo118 [61]
3 years ago
11

A solution is made by dissolving 3.8 moles of sodium chloride (NaCl) in 185 grams of water. If the molal boiling point constant

for water (Kb) is 0.51 °C/m, what would be the boiling point of this solution? Show all of the work needed to solve this problem.
Chemistry
1 answer:
IceJOKER [234]3 years ago
7 0
The boiling point of the solution can be calculated by the equation of the colligative property named boilng point elevation.

The formula for the boiling point elevation is:

ΔTb = i * Kb * m

Where:

i = van't Hoof factor
Kb = molal boiling point constant
m = molality.

Solution:

1) i is 2 because the NaCl is ionice and dissociates into two ions.

2) Kb is given = 0.51 °C/m

3) m = moles of solute / kg of solvent

moles of solute is given = 3.8

kg of solvent = 185 g * 1 kg/1000g = 0.185 kg

m = 3.8 moles / 0.185 kg = 20.54 m

4) ΔTb = 2 * 0.51°C/m * 20.54m = 20.9 °C

5) The boiling point is the normal boiling point of water (100°C) plus the increase:

Tb = 100°C + 20.9°C = 120.9°C

Answer: 120.9°C.

You might be interested in
After Callie obtained her original results, she wanted to dig deeper. She determined that the germinating corn seed had utilized
Airida [17]

Answer:

Callie expect 600 molecules of CO2 to have been released as a waste during the same amount of time.

Explanation:

During cellular respiration 1 molecule of glucose undergoes oxidation to form 6 molecules of CO2 as a waste product.

     According to the question callie determined that the germinating corn seed had utilized 100 molecules of glucose.

    So 100 molecules of glucose will release 100×6=600 molecules of CO2 as a waste product.

8 0
3 years ago
Read 2 more answers
Why must a new flu vaccine be manufactured annually?
mafiozo [28]

Answer:

D or A

<em>But I do know...</em>

It's because new strains of the virus are constantly appearing and evolving, so the vaccine must change along with them.

7 0
2 years ago
Sodium explodes when it contacts water. If I have a compound that contains sodium, will it explode if it is exposed to water?
Vaselesa [24]

Answer:

Option D = No, when elements combine to form a new material, they have properties unique to the new materials.

Explanation:

When sodium contact with water it loses its one electron and thus gain positive charge. When there are more sodium atoms present and many atoms do this thus more positive ions are produced and these positive ions repeal each other at high speed and explosion occur.

But when it form compound with other material, it will not showed this behavior.

Example:

Consider the sodium chloride, when it dissolve in water sodium not showed explosion. In sodium chloride sodium already gives its electron to the chlorine and have stable electronic configuration. The sodium present in cationic form. When it dissolve, partial positive charge of water surrounds the Cl⁻ and partial negative charge of water surrounds the Na⁺ ion, ans sodium chloride gets dissolve into water without explosion.

6 0
3 years ago
Read 2 more answers
How do the names of molecular compounds differ from the names of ionic compounds.
34kurt

Long Answer:

Ionic: Cation is named first followed by the anion.

If it's an ionic compound with a transition metal, there are more than one possible ion. Molecular - named with the least electronegative ion first + prefixes are given to both ions to indicate number of atoms in each element.

Short Answer: Ionic compounds- Cation is named first, followed by the anion.

8 0
3 years ago
briefly explain why the number of electrons circling the nucleus determines the physical and chemical properties of the Atom
mel-nik [20]

Answer:

Electrons are negatively charged particles that orbits the nucleus

Explanation:

Chemical and physical properties of elements are usually determined by the number of electrons they posses. When atoms combine, they do so in order to attain stability.

3 0
3 years ago
Other questions:
  • Which sample of matter has a crystal structure?
    12·1 answer
  • “It is important we work together on this project; we want our group to succeed.” This statement reflects __________.
    14·1 answer
  • Hydroxyapatite, Ca 10 ( PO 4 ) 6 ( OH ) 2 Ca10(PO4)6(OH)2 , has a solubility constant of Ksp = 2.34 × 10 − 59 2.34×10−59 , and d
    15·1 answer
  • How many bonds are present in HCI?<br><br> a) 1<br> b) 3<br> c) 4<br> d) 2
    10·2 answers
  • If a sample of oxygen occupies a volume of 85.0 L at a pressure of 67.4 kPa and a temperature of 245K , what volume would the ga
    11·1 answer
  • Look up the active ingredient in baking soda. Write a molecular and net ionic equation when that active ingredient is mixed with
    11·1 answer
  • Is a squirrel eating acorns and a fire burning a good examples of chemical energy
    8·2 answers
  • Magnesium hydroxide is 54.87% oxygen by mass.
    10·1 answer
  • Carbohydrates like sugars and starches are made of only three elements: carbon (C), hydrogen (H), and oxygen (O). How is it poss
    14·1 answer
  • why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!