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
Otrada [13]
3 years ago
9

A chemist dissolves 1.3 mol NaCl in a 2.0-kg sample of water. What is the boiling point of this solution? (Assume that pure wate

r boils at 100°C and that Kb for water = 0.512°C/m.)
Chemistry
2 answers:
mafiozo [28]3 years ago
8 0
For this problem, the solution is exhibiting some colligative properties since the solute in the solution interferes with some of the properties of the solvent. We use equation for the boiling point elevation for this problem. We do as follows:
<span>
ΔT(boiling point)  = (Kb)mi
</span>ΔT(boiling point)  = (0.512)(1.3/2.0)(2)
ΔT(boiling point)  = 0.67 degrees Celsius
<span>
T(boiling point) = 100 + 0.67 = 100.67 degrees Celsius</span>
lara31 [8.8K]3 years ago
7 0

Answer:

100.67°C

Explanation:

You might be interested in
A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is
Inessa05 [86]

Answer:

T=2.78x10^3 \°C

Explanation:

Hello,

In this case, considering that the safe temperature may be computed via the ideal gas law as we now the pressure, mass and volume via the dimensions:

V=\pi r^2 h=\pi *(41.0cm)^2*49.2cm=2.60x10^5cm^3*\frac{1L}{1000cm^3} =260L

The pressure in atm is:

P=3.70MPa*\frac{1x10^6Pa}{1MPa} \frac{1atm}{101325Pa} =36.5atm

And the moles considering the mass and molar mass (66 g/mol) of dinitrogen difluoride (N₂F₂):

n_{N_2F_2}=2.50kg*\frac{1000g}{1kg}*\frac{1mol}{66g} =37.9mol

In sich a way, by applying the ideal gas equation, which is not the best assumption but could work as an approximation due to the high temperature, the temperature, with three significant figures, will be:

T=\frac{PV}{nR}=\frac{36.5Pa*260L}{37.9mol*0.082\frac{atm*L}{mol*K} }\\  \\T=3053.6K-273.15\\\\T=2.78x10^3 \°C

Best regards.

7 0
3 years ago
Elements are organized on the periodic table according to
Alex

Answer:

atomic number

Explanation:

The periodic table is a table that lists all of the chemical elements in order of atomic number, starting with hydrogen and ending with oganesson. The number of protons in the nucleus of an atom of a certain element is its atomic number.

Have a good day :)

5 0
2 years ago
Why is it important to know what weather fonts are
morpeh [17]

Answer: In order to forecast the weather, they study high and low pressure systems and the boundaries between them which is why they are called weather fonts

Explanation:

4 0
3 years ago
Bradley was working in the lab. He accidentally poured a container of concentrated hydrochloric acid into his container of disti
nexus9112 [7]

Answer is: The solution has now become a good conductor of electricity.

Hydrochloric acid (HCl) dissociate on positive ions or cations of hydogen (H⁺) and negative ions or anions of chlorine (Cl⁻) accordinf to balanced chemical reaction:

HCl(aq) → H⁺(aq) + Cl⁻(aq).

When there are free cations and ions, water solution can conduct electricity.

4 0
3 years ago
Read 2 more answers
which element has the electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d8
salantis [7]

Answer:

Darmstadtium

Explanation:

An element with the electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p⁶7s²5f¹⁴6d⁸ has 110 electrons in its electron shells.

Since the element is a neutral atom, this number is also equal to its atomic number. Therefore, its atomic number is 110.

The element in the period table that has an atomic number of 110 is Darmstadtium, a d-block element, thus a transittion metal. It also belong to period 7 in the Periodic table of elements.

3 0
3 years ago
Other questions:
  • In the chemical laboratory why do scientists use a mortar and pestle
    9·1 answer
  • Choose all the answers that apply. Lakes are recharged by _____. 1.evaporation 2.precipitation 3.rivers 4.transpiration 5.ground
    12·2 answers
  • Explain the process of fossil creation.
    14·1 answer
  • how many seconds are there in 2500 years? (assume 1 year=365 days) express your answer using three significant figures
    12·2 answers
  • How to do lewis dot structure of nh3conh3
    11·1 answer
  • Only one variable can be changed at a time
    8·1 answer
  • The quantity of antimony in a sample can be determined by an oxidation–reduction titration with an oxidizing agent.
    8·2 answers
  • Doesn't matter now . It's fine
    14·1 answer
  • Claim: An ecosystem can survive with only producers.
    7·2 answers
  • Advantages of artificial silk over natural silk​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!