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2 years ago

How may a substance be tested to determine whether or not it is an element

1 answer:

7 0

Always remember that a compound can be separated into simpler substances by chemical methods/reactions. While elements cannot be broken down into simpler substances by chemical reactions. You can do a flame test and spectrum analysis to determine whether a solid material is an element or a compound. Check the boiling and/or melting point, color or density. Also check the solid material’s reaction with oxygen, hydrogen, calcium, or various acids. Examine and study its physical chemistry. The element(s) that may be present may be identified by checking the absorption edges from an x-ray spectrum.

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How many moles of iron can be recovered from 100.0 kg fe3o4?

Leokris [45]

Hello!

To know how many moles of iron can be recovered from 100 kg of Fe₃O₄ we'll need to use the molar mass of Fe₃O₄ and apply the conversion factor to go from kg of Fe₃O₄ to moles of Fe in the following way:

$100 kg Fe_3O_4* \frac{1000 g}{1 kg}* \frac{1 mol Fe_3O_4}{231,533 g Fe_3O_4}* \frac{3 mol Fe}{1 mol Fe_3O_4}=1192,68 moles Fe$

So, theoretically, one could recover 1192,68 moles of Fe from 100 kg of Fe₃O₄

Have a nice day!

5 0

3 years ago

Read 2 more answers

The process of generating electricity from dams and nuclear power plants is very different, but some of the energy transformatio

Alexxx [7]

Answer:

Kinetic energy to mechanical energy, and mechanical energy to electrical energy.

Explanation:

From the Law of conservation of Energy, which state that energy can neither be created nor destroyed but can be transformed from one form to another. Energy transformation is essential in science and technology, in the process of generating electricity from dams and nuclear power plants

some of the energy transformations are the same, the energy transformations occur in both dams and nuclear power plants is Kinetic energy to mechanical energy, and mechanical energy to electrical energy. Kinectic energy is the energy in motion which means the dams is a running water and posses a Kinectic energy then it's is been convert to mechanical energy (which is the macroscopic energy) then to electrical energy by producing light.

3 0

2 years ago

Read 2 more answers

Scientists may come up with different interpretations of the same data.True or falls?

kondaur [170]

Answer:

Scientists interpret data based on their background knowledge and experience; thus, different scientists can interpret the same data in different ways.

Therefore the answer to your question is

Hope this helps you...

Hope you have a nice day ahead...

6 0

2 years ago

1. A solution is a mixture. The part of the solution in the greater amount is called the

olga_2 [115]

Answer:

Solvent

Explanation:

Many people use the solute to describe the solid being dissolved and the solvent to describe the thing doing the dissolving, but really solvent means the part of the solution with a greater amount/concentration.

For example, if you have 1 gram of salt in 10 liters of water, the water is the solvent.

5 0

2 years ago

Draw the Lewis Structure for NI3.

monitta

Explanation:

Nitrogen triiodide (NI₃)

Valence electrons of nitrogen = 5

Valence electrons of iodine = 7

The total number of the valence electrons = 5 + 3(7) = 26

The Lewis structure is drawn in such a way that the octet of each atom and duet for the hydrogen in the molecule is complete. So,

The Lewis structure is shown in image below.

Nitrogen posses one lone pair and thus the geometry is pyramidal.

4 0

3 years ago