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Tom [10]
3 years ago
15

HELP NEEDED ASAP !! VERY MUCH APPRECIATED ! CHEMISTRY

Chemistry
1 answer:
mash [69]3 years ago
5 0
Workings are in the picture! first you get moles of Fe2O3, then you get moles of Al and then you get mass of Al!

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A block has a mass of 25 grams and a volume of 24.5 cm3 what is the<br> density of the block?
schepotkina [342]

Answer:

<h3>The answer is 1.02 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass of block = 25 g

volume = 24.5 cm³

The density of the block is

density =  \frac{25}{24.5}  \\  = 1.020408163...

We have the final answer as

<h3>1.02 g/cm³</h3>

Hope this helps you

7 0
3 years ago
Describe one way to prove that a mixture of sugar and water is a solution and that a mixture of sand and water is not a solution
Llana [10]

Answer:

The solution is always homogeneous mixture and transparent through which the light can travel. The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture while the sand can not dissolve in water and sand particles scatter the light.

Explanation:

Solution:

"The solution is always homogeneous mixture and transparent through which the light can travel"

The mixture of water and sugar is a solution because sugar is soluble in water and form homogeneous mixture. The solubility of sugar is high as compared to the sand in water because the negative and positive ends of sucrose easily dissolve into the polar solvent i.e, water

Suspension:

"Suspension is the heterogeneous mixture, in which the solute particles settle down but does not dissolve"

The mixture of water and sand is suspension. The sand can not dissolve in water because it is mostly consist of quartz. The nonpolar covalent bonds of  sand are too strong and cannot be break by water molecules.

7 0
3 years ago
Which statement best describes the concept of civil duty??
Fed [463]
D . Different branches of the government check one another’s powers
3 0
3 years ago
Read 2 more answers
How many moles of carbon are in the sample?
mafiozo [28]

Answer:

12.01 grams per mole

Explanation:

theres no sample or example so if theres grams of Carbon, convert it to moles using 12.01g/mol

7 0
3 years ago
What is the difference between a subsurface and a surface event? List an example of each from the rock cycle.
GenaCL600 [577]

Answer:

The events in the rock cycle can be divided into categories:

a) Surface Events

These are the changes that occur on the surface of the earth. This includes weathering and erosion

Igneous Rocks

b) Subsurface Events

These are the changes in the cycle that occur in the inner surface of our planet. This is under the surface of Earth. This includes process like plate tectonics and mountain building.

Sedimentary

4 0
3 years ago
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