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
kakasveta [241]
2 years ago
13

A compound was isolated and found to contain 72.2% magnesium and the rest nitrogen. What is the empirical formula of this compou

nd?
Chemistry
1 answer:
strojnjashka [21]2 years ago
6 0
Since the compound is 72.2% Mg then there would be 27.8% N. Then you can just change it to 72.2 g Mg and 27.8 g N.
then convert to moles by dividing by molecular mass.
72.2÷24.31=2.96 moles Mg
27.8÷14.01=1.98 moles N
then divided by the lowest number.
2.96÷1.98=1.5
Since it is 1.5 you multiply by 2. so you have 3 Mg
1.98÷1.98=1 N
so the empirical formula is Mg3N
You might be interested in
What is the ph of a 0.20 M solution of NH4Cl? [Kb(NH3) = 1.8 x 10^-5]
Pavlova-9 [17]

"NH4+ <----> NH3 + H+  

The constant of this equilibrium is: K = Kw / Kb = 1 x 10^-14 / 1.8 x 10^-5 =5.56 x 10^-10  

5.56 x 10^-10 = x^2 / 0.20-x  

x = [H+] =1.1 x 10^-5 M  

pH = 5.0"

8 0
3 years ago
Read 2 more answers
Classify each of the observed changes according to whether or not they are likely to represent evidence that a chemical reaction
Mama L [17]

Answer:

a solution color becoming less intense  due to dilution- is not an evidence of a chemical reaction

bubbles (gas formation) - evidence of a chemical reaction

explosion or fire - evidence of a chemical reaction

changes in color- evidence of a chemical reaction

precipitation- evidence of a chemical reaction

changes in temperature - evidence of a chemical reaction

a solid liquifying - is not an evidence of a chemical reaction

solution colors mixing - is not an evidence of a chemical reaction

Explanation:

A chemical change is not easily reversible and yields new substances. It is often accompanied by a loss or gain of heat.

In the answer section, i have shown some evidences that lead us to conclude that a chemical reaction has taken place. The occurrence of a chemical change often goes with the formation of new substances as earlier stated and any of these signs may accompany the process.

For instance, when a metal is dropped in dilute acid solution, bubble of hydrogen gas indicates that a chemical reaction has taken place.

8 0
3 years ago
4 NH3 + 7 O2 → 4 NO2 + 6 H2O What is the mole ratio between oxygen and nitrogen dioxide? 7 moles to 6 moles 4 moles to 6 moles 7
Mashutka [201]

Answer:

7:4

Explanation:

O2 : NO2

7 : 4

hope this helps :)

8 0
2 years ago
What do a mole of magnesium (Mg) and a mole of iron (Fe) have in common?
azamat
What they have in common is that they both have the same number of atoms.
9 0
3 years ago
Identify the type of reaction occurring based on the description
postnew [5]

Answer:double displacement

Explanation:I just did it

8 0
3 years ago
Other questions:
  • How many co2 molecules are generated from each pyruvate that enters the mitochondria?
    7·1 answer
  • The attraction of like water molecules to each other is called _________.
    15·1 answer
  • Maria is researching a family of elements for her high school chemistry class. She is using her text book for information about
    14·1 answer
  • How do you scientist learn about the moon in other planets
    15·1 answer
  • If there are 2.54cm in an inch , how many inches are in 14.8cm?
    12·2 answers
  • Sasha did an experiment to study the solubility of two substances. She poured 100 mL of water at 20 °C into each of two beakers
    7·1 answer
  • List 2 metals that can be used as fuel
    10·1 answer
  • Please help due tomorrow science
    5·1 answer
  • Why is space cold ???
    10·1 answer
  • Why was the measurement unit for metal content in Experiments 1 and 2 different? In Experiment 1:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!