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borishaifa [10]
2 years ago
15

True or false?

Chemistry
2 answers:
antoniya [11.8K]2 years ago
7 0
1 False
2 True

Good luck!!
sertanlavr [38]2 years ago
5 0
The answers are :
1 - F
2- T
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What is the mass of 5 moles of Nitrogen gas
love history [14]
Molar mass N₂ = 28.0 g/mol

1 mole ------------- 28.0 g
5 moles ------------ ?

mass = 5 . 28.0 / 1

mass = 140 g

hope this helps!
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3 years ago
What does refluxing a reaction mean in organic chemistry lab?
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Answer: Reflux refers to an experimental method that involves heating a reaction mixture to the boiling point temperature of the reaction solvent and inducing the solvent to recondense back into the reaction flask using a condenser.

Explanation: Hope this helps

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2 years ago
Which of the following trends is indirectly proportional to effective nuclear charge, Zeff
Julli [10]

Answer : Option C) Atomic Size

Explanation : The atomic radius of the elements is found to be decreasing if we go from left to right in the modern periodic table. Accordingly, Z_{eff} increases as the number of shielding electrons present in the atomic nucleus of the periodic elements which lies in the same row remains constant while the number of protons in each atomic shell increases.

The effective nuclear charge Z_{eff} of an atom is defined as the net positive charge which is felt by the valence electron of the atomic element.

When Z_{eff} is observed to decrease, it is seen that the atomic radius grows in size. So, it explains the inverse relationship between both. This phenomenon occurs, because there is more screening of the electrons from the nucleus taking place, which is observed due to decrease the attraction between the electron and the nucleus.

7 0
3 years ago
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Why is Dalton's Gas Law a problem for people who visit high altitudes?
sergey [27]
Dalton’s law states that any given time the percentage of each of these (toxic?) gasses in the air we breathe it’s contribution.

People who ascend high altitudes experience Delton’s law when they try to breathe. Oxygen’s pressure decreases a total atmospheric pressure decreases in accordance with Dalton’s law.
6 0
3 years ago
Calculate the molar mass of the acid.
JulijaS [17]
Citric acid has the molecular formula C6H8O7 so you can add the molar masses of the elements from the periodic table. C has a molar mass of 12.01 g/mol, H has 1.01 g/mol and O has 15.999 g/mol. Now you calculate the total molar mass= (6*12.01 + 8*1.01 + 7*15.999). This yields a molar weight of 192.124 g/mol (anhydrous)
3 0
3 years ago
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