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
Stells [14]
2 years ago
7

100 grams of iron ore contains 30.06% oxygen find the empirical formula​

Chemistry
1 answer:
Serga [27]2 years ago
8 0

Answer: Fe2O3

Explanation:

100 grams of iron ore = 30.06% oxygen

100 - 30.06 = 69.94% iron

Mr of Iron = 55.85

Mr of Oxygen = 16

Iron = 69.94/55.85 = 1.252

Oxygen = 30.06/16 = 1.879

1.879 / 1.252 = 1.5 of Oxygen

1.252/1.252 = 1 of Iron

we can write that as Fe1O1.5 but we can't use decimals therefore we have to multiply the whole thing by 2

So it comes out to be Fe2O3

You might be interested in
Which of the following is the correct scientific notation for 0.0000782 g?
Dominik [7]
The correct scientific notation is 7.82 x 105 g
7 0
3 years ago
Read 2 more answers
What is the halogen in period 5?? it has six letters
Misha Larkins [42]
Simple,

take a look at your periodic table, if you have it labeled look at the Halogen

Group, it includes: Flourine, Chlorine, Bromine, Iodine, and Astatine.

Now, a period on the periodic table is read from left to right, and goes

down the rows of the periodic table.

Go to Period 5, go all the way to the Halogens, what is there? 

Iodine.

Thus, your answer.
8 0
3 years ago
A sample in made of copper and zinc. It has a high melting point, can conduct electricity in a solid and liquid state, and is ma
Scrat [10]
The answer is C. Only metallic alloys are malleable and ductile. The other descriptions can apply to all 3 answers
4 0
2 years ago
Less energy was entering Earth's
ololo11 [35]

Answer:

The temperatures on Earth increase

Explanation:

more energy results in more heat.

6 0
2 years ago
Is boron an element a compound a heterogeneous mixture or a homogeneous mixture?
liberstina [14]
The answer is heterogeneous mixture<span> because the </span>blood<span> cells are physically separate from the </span>blood<span> plasma.</span>
3 0
3 years ago
Other questions:
  • What is the molarity of 53.0 grams of HCl dissolved in 400.0 mL of water
    6·1 answer
  • A rectangular prism of volume 84 cm3 has a mass of 760 g. What is the density of the rectangular prism?
    8·2 answers
  • How can you write Mg(OH)2 in subscripts
    14·1 answer
  • Let this be an easy 5 points for your brainly account all is ask for in return is a "thank you"
    11·1 answer
  • You contain the same elements that are found in and around the Earth. The atmosphere contains mostly nitrogen, 78%, and oxygen,
    8·1 answer
  • Please complete the sentence. Matter can be classified as a(n) ____________ or a(n) ________________?
    11·2 answers
  • What is the mass in grams of 0.250 mol CH2Cl2?
    12·2 answers
  • Which of the following is a scientific question you could ask about the game
    5·1 answer
  • Explain the properties of acids
    5·1 answer
  • If you have 50 grams of water, how many moles would that be?*
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!