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
Maru [420]
3 years ago
10

Lactose, C12H22O11, is a naturally occurring sugar found in mammalian milk. A 0.335 M solution of lactose in water has a density

of 1.0432 g/mL at 20 o C. What is the concentration of this solution in the following units?
i) mole fraction
ii) molality
iii) mass percent
Chemistry
1 answer:
Dmitry_Shevchenko [17]3 years ago
5 0

The molality of the solution is 0.00037 m.

<h3>What is concentration?</h3>

The term concentration refers to the amount of solute in a solution.

We have the following information;

Molarity = 0.335 M

Density =  1.0432 g/mL

Temperature = 20 o C

The molality of the solution is obtained from;

m = 0.335 M ×  1.0432 g/mL/ 1000(1.0432 g/mL) - 0.335 M (342 g/mol)

m = 0.344/1043.2 - 114.57

m =  0.344/928.63

m = 0.00037 m

Learn more about molality of solution: brainly.com/question/4580605

You might be interested in
Write the net ionic equation, including the phases.2hno3(aq)+sr(oh)2(aq) ---&gt; 2h2o(l)+srno32(aq)
Nezavi [6.7K]
Balanced chemical reaction: 
2HNO₃<span>(aq) + Sr(OH)</span>₂(aq) → 2H₂O(l) + Sr(NO₃)₂<span>(aq).
Balanced ionic reaction:
2H</span>⁺(aq) + 2NO₃⁻(aq) + Sr²⁺(aq) + 2OH⁻(aq) → 2H₂O(l) + Sr²⁺(aq) + 2NO₃⁻(aq).
Net ionic reaction:
2H⁺(aq) + 2OH⁻(aq) → 2H₂O(l).
(aq) means that substances are dissociated on cations and anions in water.
7 0
3 years ago
GIVING BRAINIEST FIVE STARS AND HEART!
Romashka [77]

Answer:

Matter cannot be created destroyed

Explanation

Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.

4 0
3 years ago
Natalie observes these characteristics in the model of an atom. (i) includes positive charge (ii) contains electrons (iii) expla
patriot [66]

Electron cloud model

5 0
3 years ago
Find the mass in grams of 5.34 *10^20 atoms of carbon molar mass 12g
emmasim [6.3K]

0.01068‬g

Explanation:

Given parameters :

Number of atoms = 5.34 x 10²⁰ atoms

Molar mass of carbon = 12g

Unknown:

Mass of carbon = ?

Solution:

A mole of a substance is unit that contains the Avogadro's number of particles.

   1 mole = 6.02 x 10²³ atoms ;

 In  5.34 x 10²⁰ ;

   Number of moles = \frac{5.34 x 10^{20} }{6.02 x 10^{23} }  = 8.9 x 10⁻⁴moles

Mass = number of moles  x molar mass = 8.9 x 10⁻⁴ x 12 = 0.01068‬g

learn more:

Molar mass brainly.com/question/2861244

#learnwithBrainly

6 0
4 years ago
An organic chemist combines 2-methyl-2-butanol with sodium dichromate in sulfuric acid and water. Which of the following best de
Valentin [98]

Answer:

SN1 = a stepwise loss of a leaving group to form a carbocation followed by nucleophilic attack

Explanation:

Since 2-methyl-2-butanol is tertiary alcohol, the first step will be loss of leaving group to form a 3° carbocation which is very stable and favours SN1, followed by attack of nucleophile

4 0
4 years ago
Read 2 more answers
Other questions:
  • Formula A: CH3
    15·2 answers
  • A student placed 18.5 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then
    8·1 answer
  • How are insect wings not likely to be fossilized?
    8·1 answer
  • What is the molar mass of a substance?
    12·1 answer
  • Please help me, Thank you!
    8·1 answer
  • Cómo se llama la sustancia pura que está compuesta por lo menos de dos átomos los cuales pueden ser iguales o distintos?
    8·1 answer
  • Raise the temperature of 2 g of water 2°C.
    15·1 answer
  • Calculate the final molarity of H2O2 if 5.5 mL of a 3.0% w/w H2O2 solution, which has a density of 1.0 g/mL, is added to 5.5 mL
    14·1 answer
  • Glucose can be found in foods like honey. What happens to glucose in the body?
    14·1 answer
  • Draw the orbital shape of s
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!