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
Alex777 [14]
3 years ago
15

Calculate the empirical formula of each of the following substances with the following compositions.

Chemistry
1 answer:
OleMash [197]3 years ago
7 0

Explanation:

Note: Molar masses of elements can be found online or in the periodic table.

Moles of Magnesium

= 3.60g / (24.3g/mol) = 0.148mol.

Moles of Chlorine

= 10.65g / (35.45g/mol) = 0.300mol.

Mole ratio of Magnesium to Chlorine

= 0.148mol : 0.300mol = 1 : 2.

Hence we have the empirical formula MgCl2.

Moles of Lithium

= 9.1g / (6.94g/mol) = 1.311mol.

Moles of Oxygen

= 10.4g / (16g/mol) = 0.650mol.

Moles ratio of Lithium to Oxygen

= 1.311mol : 0.650mol = 2 : 1.

Hence we have the empirical formula Li2O.

You might be interested in
To measure the amount of nickel in some industrial waste fluid, an analytical chemist adds sodium hydroxide solution to a sample
Cloud [144]

Answer:

The final balanced equation is

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

Explanation:

It is given that sodium hydroxide is added to collect the solid nickel(II) hydroxide product

The empirical equation for this statement is

Ni2+ + NaOH --> Ni (OH)2 + Na+

We will first balance the hydroxide molecule. On the right side there are two OH molecules.

Thus, on the left side we will take 2 sodium hydroxide

Ni2+ + 2NaOH --> Ni (OH)2 + Na+

Now we will balance the sodium ion which are 2 in numbers on the left side and 1 on the right side

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

So, the final balanced equation is

Ni2+ + 2NaOH --> Ni (OH)2 + 2Na+

8 0
3 years ago
KMnO4<br><br> Assign oxidation numbers to each element in this compound.
zysi [14]

K=+1

Mn= +7

O= -2

That’s it!!!

8 0
3 years ago
How does the location of mesosaurus fossils support the theory of continental drifts?<br>​
Ratling [72]

Answer:

For this reason, the existence of Mesosaurus helps support the theory of continental drift; that is, the now-well-attested fact that South America and Africa were joined together into the giant continent Gondwana 300 million years ago before the continental plates supporting them broke apart and drifted.

Explanation:

3 0
3 years ago
Day 2 code word
bagirrra123 [75]

Answer:

chloroplast

Explanation:

4 0
3 years ago
Give a structural formula to match the name: ethylpropylamine
SIZIF [17.4K]
<span>Ethylpropylamine has a chemical formula of C2H13N. It has a molecular weight of 83.166 g/mol. It's considered highly flammable and dangerous if swallowed. It should not come in contact with skin or in eyes and it should not be inhaled.</span>
3 0
3 years ago
Other questions:
  • An unknown quantity of sugar was completely dissolved in water at 75 degrees Celsius to form a clear and colorless solution. The
    13·1 answer
  • What happens to the molecules of water as it freezes?
    11·1 answer
  • Determine the amount of heat (in kJ) given off when 1.26 × 104 g of ammonia are produced according to the equation N2(g) + 3H2(g
    13·1 answer
  • What is the percentage of aluminum in aluminum oxide (al2o3?
    6·2 answers
  • Explain examples of a physical and chemical change of matter
    6·1 answer
  • In a comparison of metals to nonmetals,metals tend to have
    10·1 answer
  • As a factor of production, land best refers to
    9·2 answers
  • How might you make sure you have the correct amount of nitrogen and hydrogen so that you have enough of each with not wasted sur
    10·1 answer
  • Match each energy transformation to the correct image. ANSWER FAST PLS!!! THIS IS FOR 20 POINTS!!! AND I WILL MARK BRAINLIEST IF
    12·2 answers
  • Methane Gas (CH4) is an example of a(n) __________. *
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!