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BlackZzzverrR [31]
3 years ago
10

I NEED THIS ANSWER A.S.A.P

Chemistry
2 answers:
grigory [225]3 years ago
6 0
Extrusive. Please give me a brainliest! Im new i really need it thanks
Svetradugi [14.3K]3 years ago
6 0
Your answer for that question is D
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Beryllium oxide, Beo, is an electrical insulator. How
egoroff_w [7]

Answer:

There are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.

Explanation:

We can calculate the number of moles (η) of BeO as follows:

\eta = \frac{m}{M}

Where:

m: is the mass = 250 g

M: is the molar mass = 25.0116 g/mol

Hence, the number of moles is:

\eta = \frac{250 g}{25.0116 g/mol} = 10.0 moles

Therefore, there are 10.0 moles of beryllium oxide in a 250 grams sample of the compound.  

I hope it helps you!

3 0
3 years ago
Which is the balanced equation for:<br> Al2O3 + Fe – Fe3O4 + AL
Sloan [31]

Answer:

4Al203 + 9Fe -> 3Fe3O4 + 8Al

Amount of Al on reactant side: 8

Amount of Al on product side: 8

Amount of O on reactant side: 12

Amount of O on product side: 12

Amount of Fe on reactant side: 9

Amount of Fe on product side: 9

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3 years ago
A student is learning about a particular chemical element. The element is a metal that readily forms ionic salts with nonmetals
seropon [69]

Answer:

Group 2

Explanation:

Because group 2 is very reactive and forms salts with other non metals. Example Calcium Chloride. Calcium is from group 2, forms ionic salts with other non metal, and exists as solid at standard temp and pressure.

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Which veriable should he change, measure and control (temp of water, volume of water and mass of sodium chloride that dissolve )
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I would say
change: Temp
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Control: Volume
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