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
swat32
2 years ago
5

A 15.00 % by mass solution of lactose (C 12H 22O 11, 342.30 g/mol) in water has a density of 1.0602 g/mL at 20°C. What is the mo

larity of this solution
Chemistry
1 answer:
Alik [6]2 years ago
3 0

Answer:

22.82M

Explanation:

342.3g/mol is présent in 1000

what about in 15??

( 342.3g/mol × 1000 ) ÷ 15

You might be interested in
How many moles are in 91.5 grams of Helium?
konstantin123 [22]

In order to find the number of moles with a given mass of Helium, we need to use its molar mass, which is 4.0026g/mol, therefore we will have:

4.0026g = 1 mol of Helium

91.5g = x moles of Helium

x = 22.86 moles of Helium in 91.5 grams

4 0
1 year ago
Could someone help me with this too? Much appreciated! I am a bit stuck.
Mashcka [7]

Answer:

CO

Explanation:

4 0
2 years ago
Explain why some atoms gain or lose electrons to form ions.
anygoal [31]
Because some atoms<span> are more stable when they </span>gain or lose<span> an </span>electron<span> and </span>form ions<span>.</span>
7 0
3 years ago
Read 2 more answers
Which of the following is the term for the heaviness on something's surface that exerts a force over an area? a. force b. pressu
Elan Coil [88]

Answer:

i think the answer is pressure

3 0
2 years ago
Read 2 more answers
Iron is extracted from iron oxide in the Blast Furnace: Fe 2 O 3 + 3 CO → 2 Fe + 3 CO 2
arsen [322]

a. mass of iron = 69.92 g

b. percent yield = 93%

<h3>Further eplanation </h3>

Percent yield is the compare of the amount of product obtained from a reaction with the amount you calculated

General formula:

Percent yield = (Actual yield / theoretical yield )x 100%

An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients

a.

Reaction

Fe₂O₃+3CO⇒2Fe+3CO₂

MW Fe₂O₃ :  159.69 g/mol

mol Fe₂O₃

\tt \dfrac{100}{159,69}=0.626

mol Fe₂O₃ : mol Fe = 1 : 2

mol Fe :

\tt \dfrac{2}{1}\times 0.626=1.252

mass of Fe(Ar=55.845 g/mol) :

\tt 1.252\times 55.845=69.92~g

b.

actual yield = 65 g

theoretical yield = 69.92 g

percent yield :

\tt =\dfrac{65}{69.92}=0.93=93\%

8 0
3 years ago
Other questions:
  • When a solid compound is formed from chemicals which are in solution, it is called a?
    11·2 answers
  • Ethanol is produced from ethene by hydration in the presence of a catalyst.<br> What is hydration?
    6·1 answer
  • What is the solute in a solution
    10·2 answers
  • What would happen if they had no sunlight???
    5·2 answers
  • What is the definition of a solution
    5·1 answer
  • What is always conserved in a chemical reaction? (3 points)
    6·1 answer
  • NO2 is added to the reaction to speed it up. In which form would this substance be a homogeneous catalyst for this reaction?
    6·1 answer
  • How do S waves move through the earth?
    10·1 answer
  • The planet Mercury takes 176 days to do one spin around its pole. Compared to the Earth,
    11·1 answer
  • Help plsssssssssssssssssssssssssssssssssssssssssss
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!