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mafiozo [28]
3 years ago
8

Josh used several different liquid chemicals for an experiment in his chemistry class. After completing the experiment, the chem

icals were no longer usable. Josh carefully poured each chemical into a bottle marked "Waste" and placed the lid back on the bottle. Did Josh use the correct procedure?
A.
No; different types of chemical waste should not be mixed together.
B.
No; the chemicals should have been poured down the sink.
C.
No; the chemicals should have been poured into the trash can.
D.
Yes; the chemicals were stored in the proper place.
Chemistry
1 answer:
Sliva [168]3 years ago
3 0
The answer is A (No; different types of chemical waste should not be mixed together).

This should be complete common sense, but the answer B is incorrect because chemical SHOULD NOT be poured down a drain because It can go out into the sewer. C is wrong because it can go through the trash can or into the dump and contaminate other things.
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Round to 4 significant figures.<br> 35.5450
Masja [62]

Answer:

35.5450 will be rounded to 35.55

Explanation:

=35.5450

if the last digit is less than 5 then it will be ignored

=35.545

when the dropping digit is 5 then the retaining digit will increse by a factor of 1

=35.55

i hope this will help you

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3 years ago
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The crystal structure of an ionic compound depends on the
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Answer:

The ion's sizes and their radius ratio.

Explanation:

Ionic compounds take the form of three dimentional arrays by alternating anions and cations in order to minimize the potential energy of the system by maximizing the attractive force between opposite charges.

<em>The resultant geometric structures are known as crystal lattices and their arrangements depend on the ion's sizes and, since they are bound though electrostatic attraction, their radius ratio.</em>

I hope you find this information useful and interesting! Good luck!

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3 years ago
When an alkaline earth metal, a, reacts with a halogen, x, the formula of the covalent compund formed should be a2x?
Ierofanga [76]

Alkaline earth metal are the elements present in II group in the periodic table and are known as 'Metals' and have a charge of +2.

Alkaline earth metals - Be , Mg Ca, Sr , Ba, Ra

Halogens are present in VII A group in the periodic table and are 'Non-metals' and have a charge of -1.

Halogens - F, Cl, Br, I, At

When Alkaline earth metal (metals) combine with Halogens (non-metals) the compound formed will be ionic compound and the formula of the compound will be based on the charges of the element.

When we write the formula of the ionic compound the charges of the elements get criss crossed.

For example - Mg (Alkaline earth metal) have a charge of +2 and Cl (Halogen) have a charge of -1 and when they combine to form the formula their charges get criss crossed and we will get Mg_{1}Cl_{2} or MgCl_{2}

When an alkaline earth metal, A, reacts with a halogen, X, the formula of the Ionic compound formed should be AX_{2}


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The classification and illustrations are attached in the drawing.

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It is possible to identify the pure substance observing the figure, since it is the only one that has 2 joined atoms (purple and blue) which forms a single compound.

On the other hand, the homogeneous mixture is identified by noting that its atoms are more united with respect to the heterogeneous mixture, highlighting that in homogenous mixtures the atoms, elements or substances are not visible to the naked eye and are in a single phase, instead in the heterogeneous mixture if they can be differentiated.

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The correct answer is Co(OH) 3
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