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Lemur [1.5K]
3 years ago
14

Lab Safety Rule #3 says to always add acids or bases to the solvent and NEVER the other way around true or false?

Chemistry
1 answer:
VladimirAG [237]3 years ago
7 0

Answer:

true

Explanation:

<em>The standard laboratory rule is to always add acids or bases to solvent and not the other way round.</em>

The dissolution of concentrated acids/bases in solvents (water) generates heat energy. Thus, if the solvent is added to them, a layer of hot weak acid or base will be formed and this will boil and spray around, causing an explosion.

On the other hand, if acid/base is added to solvents, they flow into the solvents and get diluted immediately without any boiling taking place. Hence, it is safe to add acid/base to solvents and not the other way round.

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What is the formal charge of nitrogen in no2cl
Gre4nikov [31]

Answer:

The formal charge on nitrogen in NO_{2}Cl is +1.

Explanation:

The structure of NO_{2}Cl is as follows.

(In attachment)

Formal\, charge = Valence\, electron - (nonbonding\, electrons + \frac{Bonding\,electrons}{2})

From the structure, Nitrogen has no non bonding electrons. Nitrogen has four bonds and each bond corresponds to 2 electrons. Hence, nitrogen have eight bonding electrons and five valence electrons.

Formal\,charge\,on\,nitrogen = 5-[0+ \frac{8}{2}]= +1

Therefore, The formal charge on nitrogen in NO_{2}Cl is +1.

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2 years ago
A boron atom has ____ electrons at the first energy level and ____ electrons at the second energy level.
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Three different samples were on different types of balance for each sample. The three were found to weigh 0.1568934 ko. 1.215 mg
Dmitriy789 [7]

Answer:

Option d. 2615.0g

Explanation:

Let M1, M2, and M3 represent the masses of the three different samples

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