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
mr_godi [17]
3 years ago
14

Pls hlp me with these questions: brainliest, ratting, thx, etc.

Chemistry
1 answer:
daser333 [38]3 years ago
4 0
1 elements
2 they have same number of valence electrons
3 period
You might be interested in
If we were to dissolve iodine in alcohol, which term would describe the alcohol?
marishachu [46]
It will be Solvent the term that would describe the alcohol will be solvent.
4 0
3 years ago
A compound has a molar mass of 26g/mol and an empirical formula of CH. What is the molecular formula?
WINSTONCH [101]
The formula is D. C2H2
4 0
3 years ago
A sample of 19 mg of 9-fluorenone is dissolved in 5 mL of diethyl ether. The resulting organic
maks197457 [2]

Answer:

15.70mg would remain

Explanation:

Partition coefficient is used to extract or purify a solute from a solvent selectively to avoid interference from other substances. For the problem, formula is:

Kp = Concentration 9-fluorenone in ether / Concentration of solute in H₂O

After the solute, 9-fluorenone, is extracted with water, the mass that remains in ether is:

(19mg - X)

<em>Where X is the mass that now is in the aqueous phase</em>

Replacing in Kp formula:

9.5 = (19mg - X) / 5mL / (X /10mL)

0.95X = 19mg - X / 5mL

4.75X = 19 - X

5.75X = 19

X = 19 / 5.75

X = 3.30mg

That means 9-fluorenone that remain in the ether layer is:

19mg - 3.30mg =

<h3>15.70mg would remain</h3>
8 0
3 years ago
In the reaction C + O2 → CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be n
vova2212 [387]

Answer:

54g of O2 reacted in the reaction

5 0
3 years ago
Read 2 more answers
What is the answer to...
adoni [48]

Answer: short answer short 0.65 / 5.37

15% NaOH by mass is 15g of NaOH in (100-15)g of solution.

No. Of moles of NaOH in solution = 0.65

No of moles of Water in solution = 4.72

Mole Fraction =  

(

(Moles of Solvent)

(Moles Of Solute)+(Moles of Solvent)

)

OR

(

(Moles of Solvent)

Total Number Of Moles

)

= 0.65 / 5.37

= 0.121

Explanation:

Hope this helped

8 0
3 years ago
Other questions:
  • Reactant X contains 199.3 J of chemical energy. Reactant Y contains 272.3 J of chemical energy. Product W contains 41.9 J of che
    14·2 answers
  • In the laboratory a student finds that it takes 44.0 Joules to increase the temperature of 10.6 grams of solid zinc from 24.9 to
    8·1 answer
  • Which statement describes a cycle of Earth's surface?
    9·2 answers
  • Which element has properties of both metals and nonmetals?
    14·1 answer
  • Which of the following processes involves an increase in entropy?
    10·2 answers
  • IF 500 mL of air contains 2.50x10^22 particles (atoms and molecules). how much particles do you inhale in one day if you breath
    11·1 answer
  • In which of the following types of reactions are electrons gained?
    10·2 answers
  • Natural gas is a mixture of many substances, primarily CH₄, C₂H₆, C3H8, and C4₄H₁₀. assuming that the total pressure of the gase
    10·1 answer
  • Give a definition of mixture? <br> Why air is called a mixture?
    7·1 answer
  • Which structural zones exist within the core compositional zone?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!