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
kompoz [17]
3 years ago
5

A compound is found to contain 13.65 % carbon and 86.35 % fluorine by mass. To answer the question, enter the elements in the or

der presented above. QUESTION 1: The empirical formula for this compound is . QUESTION 2: The molar mass for this compound is 88.01 g/mol. The molecular formula for this compound is __________.
Chemistry
1 answer:
Nimfa-mama [501]3 years ago
5 0

Answer: The molecular formula will be CF_4

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C= 13.65 g

Mass of F = 86.35 g

Step 1 : convert given masses into moles.

Moles of C =\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{13.65g}{12g/mole}=1.138moles

Moles of F=\frac{\text{ given mass of F}}{\text{ molar mass of F}}= \frac{86.35g}{19g/mole}=4.545moles

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C = \frac{1.138}{1.138}=1

For F = \frac{4.545}{1.138}=4

The ratio of C : F= 1: 4

Hence the empirical formula is CF_4

The empirical weight of CF = 1(12)+4(19)= 88g.

The molecular weight = 88.01 g/mole

Now we have to calculate the molecular formula.

n=\frac{\text{Molecular weight }}{\text{Equivalent weight}}=\frac{88.01}{88}=

The molecular formula will be=1\times CF_4=CF_4

You might be interested in
Explain why you usually can't use just a single spectrum line to confirm the identity of an element
Agata [3.3K]
You can't usually just use a  single spectrum line to confirm the identity of an element because there are cases that the emission line id not clearly defined.  When the emission line is very weak compared to surrounding noise, in which case the more datapoints you have to build up confidence for the existence of a particular emission spectra, the better.
8 0
4 years ago
Which shape of ice melts the fastest? cylinder, cube, or rectangular cube?
Gnoma [55]
They will melt at the same rate because they contain the same matter
hope this helps and good luck on your project!!!!
3 0
3 years ago
Read 2 more answers
In a 0.01 M solution of HCl, Litmus will be
Nadya [2.5K]
In a 0.01 M solution of HCl, Litmus will be red. Litmus paper will turn into red in acidic conditions. Hydrochloric acid is an acid. Litmus is an indicator for acidity and alkalinity made from inchens.
6 0
3 years ago
Read 2 more answers
1) Which of the following is the best example of a physical change?
never [62]

1 is b and 2 is also b

4 0
3 years ago
Which of the following elements is a nonmetal? a. selenium (Se) b. yttrium (Y) c. barium (Ba) d. calcium (Ca) e. All of these ar
san4es73 [151]

<u>Answer:</u>

The correct answer option is a. Selenium (Se).

<u>Explanation:</u>

From the given answer options, Selenium (Se) is the only element which is a non metal.

It has the atomic number 34 with atomic weight 78.96. It is a member of the sulfur group of the non metallic elements and falls in period 4 of the Periodic table.

Selenium has non metallic properties which are intermediate between the elements that lie above and below it in the Periodic table.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Are changes in the state of matter (phase) considered physical or chemical changes? Why?
    15·1 answer
  • An atom of iron has the atomic number 26 and a mass number of 56. how many protons plus neutrons are in the nucleus?
    11·2 answers
  • What is the chemical formula for the compound formed between chromium(iii) and the sulfate ion
    5·2 answers
  • Calculate the χacetone and χcyclohexane in the vapor above the solution. p°acetone = 229.5 torr and p°cyclohexane = 97.6 torr.
    5·2 answers
  • Is H+ an acid, a base, or is it neutral?
    7·2 answers
  • What is 2\5 please let me know what the answer​
    9·1 answer
  • What is rate of reaction? Discuss in brief slow and fast reactions.<br>​
    9·1 answer
  • The solubility of solids______ when the temperature is increased.
    9·1 answer
  • Can mixtures and compounds be separated into their elements? If so which?
    9·1 answer
  • Plants use photosynthesis,sunlight,water and carbon dioxide to prepare their food. What are they called in a group?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!