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PSYCHO15rus [73]
3 years ago
12

Heeeeellllllppppppp!!!!!

Chemistry
1 answer:
ycow [4]3 years ago
3 0

Answer:

Heterogeneous

Explanation:

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You have 16.0 g of some compound and you perform an experiment to remove all of the oxygen, 11.2 g of iron is left. What is the
oksian1 [2.3K]

The empirical formula of this compound is equal to Fe_{2}O_3.

<h3>Empirical formula</h3>

To calculate the empirical formula of a compound, it is necessary to know the number of moles present.

Therefore, we will use the molar mass of iron and oxygen to find the amount of moles, so that:

MM_O = 16g/mol\\MM_Fe = 55.8g/mol

                                        MM = \frac{m}{mol}

  • Oxygen

                                            16 = \frac{4.8}{mol}

                                            mol = 0.3

  • Iron

                                   

                                               55.8 = \frac{11.2}{mol}

                                               mol = 0.2

Finally, as the empirical formula is composed of integers numbers of moles, just multiply the values ​​by the smallest common factor to transform into an integer, so that:

                                       O =>  0.3 \times 10 = 3moles

                                       Fe => 0.2 \times 10 = 2moles

So, the empirical formula of this compound is equal to Fe_{2}O_3

Learn more about empirical formula in: brainly.com/question/1363167

6 0
3 years ago
When you walk, you push against the floor, and _________.
Taya2010 [7]
When you walk, you push against the floor, and t<span>he floor pushes back against you.

Answer: B. The floor pushes back agaisnt you. 

Good luck with your studies, I hope this helps~!
</span>
7 0
3 years ago
1. A gas at 24.0 Celsius and.900 atm fills a 0.95 Liter container.
dangina [55]

Answer:

P₂ = 1.05 atm

Explanation:

Given data:

Initial temperature = 24.0 °C (24+273 = 297 K)

Initial pressure = 0.900 atm

Final pressure = ?

Final temperature = 75 °C (75 + 273 =348 K)

Volume = constant

Solution:

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

0.900 atm / 297 K = P₂/348 K

P₂ = 0.900 atm × 348 K / 297 K

P₂ = 313.2 atm. K /297 K

P₂ = 1.05 atm

4 0
3 years ago
An ionic isotope has 49 protons, 50 electrons, and 55 neutrons.
bulgar [2K]

We have that

  • The Element with 49 protons is Indium

the isotope symbol in the one-line format

  • indium -104
  • We have that this is a cation

From the question we are told

An ionic isotope has 49 protons, 50 electrons, and 55 neutrons.

• What is the name of the element?

What is the isotope symbol in the one-line format (e.g., hydrogen-2)?

Is this a cation or is this an anion? Explain how you know.

Generally

Generally an isotope is an a variant form of a element bearing different number of Neutrons but same Proton

Therefore

For an isotope with 49 protons, 50 electrons, and 55 neutrons.

  • The Element with 49 protons is Indium

the isotope symbol in the one-line format

  • indium -104

  • We have that this is a cation

For more information on this visit

brainly.com/question/19922822?referrer=searchResults

6 0
3 years ago
100g of radioactive mass has a half life of 5 days. Calculate the mass decayed off after 15 days
Lina20 [59]

Answer:

... mass has half life of 5 days. Calculate the mass decayed off after 15days? In Chemistry 2 Answers Available Asked by Miss Flawless on 7th July, 2018.

Explanation:

7 0
3 years ago
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