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sweet-ann [11.9K]
2 years ago
7

Which of these items is a substance that is made from two or more different elements?

Chemistry
2 answers:
liq [111]2 years ago
7 0

Answer:

b mixture

Explanation:

if you mix two or more things makes a mixture

notsponge [240]2 years ago
6 0
A compound which is D
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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
What happens to the shape of a liquid when you pour it into a container?
LenKa [72]
It shifts and the temperature changes I think hope this helps
8 0
4 years ago
why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
RideAnS [48]

Answer:

Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.

Explanation:

<h2><u><em>PLEASE MARK AS BRAINLIEST!!!!!</em></u></h2>
5 0
3 years ago
An 80.0 g sample of iodine-131 was placed in a sealed vessel forty days ago. Only 2.5 g of this isotope is now left. What is its
MA_775_DIABLO [31]
1.25, you divide 2.5 by 80, then times by 40
3 0
3 years ago
Read 2 more answers
How many elements are found in 2CuSO4?<br> A.5<br> B.4<br> C.2<br> D.3
Aneli [31]

Answer:

d

Explanation:

the reason is you have Cu S and O

4 0
3 years ago
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