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3 years ago

Which of the following statements are true about whether atoms tend to gain or lose electrons?

Chemistry

1 answer:

Dafna11 [192]3 years ago

5 0

Answer:

C and D

Explanation:

Atoms with five, six or seven valance electrons gain electrons to complete the octet because it is more convenient for the atoms to gain three, two or one electron as compared to lose five, six or seven electrons. Thus atoms with five, six or seven valance electrons form negative ions by gaining electrons.

Atoms with one, two or three valance electrons lose the electrons to get complete octet because it is more convenient for the atoms to lose one two or three electrons as compared to gain the seven, six or five electrons. The atoms with one, two or three valance electrons form positive ions.

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What happens if you don't use enough solvent for a recrystallization?

Nuetrik [128]

<span>With too little solvent, recrystallization occurs too quickly due to massive nucleation upon the flask becoming cooler. The crystals do not grow fully in this shortened period of time, as the solvent precipitates before the reaction is complete. Nucleation of the crystals also means more impurities in the final product.. .</span>

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3 years ago

The accepted value for the density of a certain material is 3.427 g/ml. Ally 10 points

vivado [14]

Answer:

5.04%

Explanation:

The accepted value of density = 3.427 g/ml

The calculated value of density = 3.600 g/ml

We need to find Ally's percentage error on her density. The error in any value is given by :

$\%=\dfrac{\text{calculated-accepted}}{\text{accepted}}\times 100\\\\=\dfrac{3.427 -3.600 }{3.427 }\times 100\\\\=5.04\%$

So, the required error is 5.04%.

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3 years ago

Which instrument is used to observe space system from Earth?

Vlad [161]

Answer:

The telescope is used.

3 0

3 years ago

Read 2 more answers

Identify the tropical zones and the temperate zones

dexar [7]

Tropical Zones
*Tropic of Cancer
*Tropic of Capricorn

I cant see it though

6 0

4 years ago

Read 2 more answers

A/1 * B/C =D

Novay_Z [31]

<h3>Answer:</h3>

0.64 Moles of Propane

<h3>Explanation:</h3>

Data:

Moles of Carbon = 1.5 mol

Conversion factor = 7 mol C produces = 3 mol of Propane

Solution:

As we know,

7 moles of Carbon produces = 3 moles of Propane

Then,

1.5 moles of Carbon will produce = X moles of Propane

Solving for X,

X = (1.5 moles × 3 moles) ÷ 7 moles

X = 0.6428571 moles of Propane

Or rounded to two significant figures,

X = 0.64 Moles of Propane

5 0

3 years ago