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Luba_88 [7]
3 years ago
15

an atom has 2 electrons in the first energy level, 8 electrons in the second energy level, and 1 electron in the third energy le

vel. What is the number of core electrons
Chemistry
1 answer:
yKpoI14uk [10]3 years ago
7 0

Answer:2

Explanation:

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Which sample contains the largest number of molecules?
joja [24]
The largest number of molecules  is the same as the largest number of moles of this molecules
to calculate the number of moles you have to divide the mass by the molar mass

molar masses:
CO2:  44,01 g/mol
CH4: 16,04 g/mol
CBr4: 331,63 g/mol
CHBr3: 252,73 g/mol

largest nº of mol= 100/(the smallest molar mass possible)
= 100/16,04
=6,23 moles

all other molecules would be smaller than 6,23 moles because the molar mass is so high.

The answer is B : 1<span>00 g of ch4</span>
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Why did geologists develop the geologic time scale?
Agata [3.3K]
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4 years ago
What are the hazards, if any of the reactants AgNO3, and K2CrO4?
Mandarinka [93]
This is what i wrote in my notebook: (for AgNO3)
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INHALATION - MAY CAUSE SEVERE IRRITATION TO MUCOUS MEMBRANES.
SKIN - MAY CAUSE SEVERE IRRITATION.
EYE - MAY CAUSE SEVERE IRRITATION.
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3 0
3 years ago
What subatomic particles are most involved in chemical bonding?
MAVERICK [17]
D. Electrons
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8 0
4 years ago
Read 2 more answers
You have two compounds that you have spotted on the TLC plate. One compound is more polar than the other. You ran the TLC plate
goldenfox [79]

Answer:

we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf

Explanation:

when we run a TLC plate in a 50/50 mixture of hexanes and ethyl acetate we will except an increase in the polarity of the system and this will cause the Non-polar spot to be near the solvent front, while the polar spot will run at an approximate speed of 0.5 Rf

The speed of the polar spot depends largely on the level of polarity, an increase in the polarity will see both spots of Neat hexane run when we run a TLC  plate in a 50/50 mixture of hexanes and ethyl acetate

3 0
3 years ago
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