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
kipiarov [429]
2 years ago
7

How much water should be added to 4.3 moles of LiBr to prepare a 2.05 m solution?

Chemistry
1 answer:
arsen [322]2 years ago
8 0

Answer:

2.1 kg of water

Explanation:

Step 1: Given data

  • Moles of lithium bromide (solute): 4.3 moles
  • Molality of the solution (m): 2.05 m (2.05 mol/kg)
  • Mass of water (solvent): ?

Step 2: Calculate the mass of water required

Molality is equal to the moles of solute divided by the kilograms of solvent.

m = moles of solute/kilograms of solvent

kilograms of solvent = moles of solute/m

kilograms of solvent = 4.3 mol /(2.05 mol/kg) = 2.1 kg

You might be interested in
A 10-liter container has 2 moles of oxygen at a pressure of 92 kpa. The effective speed (rms) of the oxygen molecules in the gas
bezimeni [28]

The effective speed (rms) of the oxygen gas is 293.68 m/s.

<h3></h3><h3>What is Root-mean-square velocity?</h3>

Root mean square velocity is the square root of the mean of squares of the velocity of individual gas molecules

v_{rms}=\sqrt[]{\frac{3RT}{M} }

<em>where </em>R = universal gas constant

M = molar mass of the gas in kg/mol

T = temperature in Kelvin

According to the ideal gas law,

PV = nRT

RT = \frac{PV}{n}

Substitute in the rms velocity formula,

v_{rms} = \sqrt[]{\frac{3PV}{nM} }

P = 92 kPa, V = 10 L, n = 2 moles and M = 32 x 10⁻³ kg/mol

v_{rms} = \sqrt[]{\frac{3\times92\times10}{2\times32\times10^-^3} }

=293.68 m/s

Thus, the effective speed (rms) of O₂ gas is 293.68 m/s.

Learn more about Root-mean-square velocity:

brainly.com/question/15995507

#SPJ4

4 0
11 months ago
5. Geologists think that the inner and outer cores of Earth consist of<br> iron and nickel.
wolverine [178]

Answer:

is this true/false? if so its true.

Explanation:

3 0
2 years ago
What are the different acid bases
Alex

Answer:

different acids include acetic acid,lactic acid,tartaric acids DNA(deoxyribonucliec acid) .

different bases include calcium oxide Potassium hydroxide ,Sodium hydroxide and Barium hydroxide .

5 0
3 years ago
G An example of an element is ____.
Contact [7]
Pipes are made of the element Lead so the answer should be d) lead pipe



4 0
3 years ago
Identify the following as physical (P) or chemical (C) changes.
Stels [109]

holacomo es tu pregunta nola entiendo

lanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • Predict the products of the reaction below. That is, complete the right-hand side of the chemical equation. Be sure your equatio
    14·1 answer
  • Write a balanced chemical equation, including physical state symbols, for the decomposition of solid calcium carbonate (CaCO_3)
    7·2 answers
  • If a chemical has a pH of 3, how could you alter its pH value to be more basic?
    10·1 answer
  • I really need help with this!
    13·1 answer
  • If a parent cell has 23 chromosomes and reproduces asexually through mitosis,how many chromosomes will each of its daughter cell
    7·1 answer
  • 1. A 225-L barrel of white wine has an initial free SO2 concentration of 22 ppm and a pH of 3.70. How much SO2 (in grams) should
    11·1 answer
  • 3. How many atoms in 3.91 moles of sodium?
    7·1 answer
  • Which type of galaxy contains mostly new stars because it has lots<br> of dust and gas
    10·1 answer
  • What was the hiker's average velocity during part C of the hike?
    8·1 answer
  • Put the sets of 3 elements in order from least metallic character to most metallic character. Help please!!
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!