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4 years ago

To separate a mixture of iron filings and salt, the most efficient method would be

Chemistry

2 answers:

CaHeK987 [17]4 years ago

7 0

Iron filings can be attracted by the magnet whereas salt can not. So the mixture can be separated by a magnet

Sloan [31]4 years ago

5 0

Answer:

passing a magnet through the mixture

Explanation:

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Which substance would have the highest melting point, based on electronegativity?

Mazyrski [523]

Answer:

H₂O

Explanation:

Based electronegativity, water H₂O will have the higher melting point from the given choices. The binding force between hydrogen and oxygen is greater than for the others.

In group 6, oxygen has the highest electronegativity.
It pulls the shared electron closer in the bond.
The high electronegativity between hydrogen and oxygen causes the elevated melting point between the two species.

5 0

3 years ago

Which set of reagents will best convert 2,2-dimethylpropan-1-ol (neopentyl alcohol) to 4,4-dimethylpentan-2-ol

Sladkaya [172]

Answer:

SOCl2, Mg, CH3CHO, H3O^+

Explanation:

The reaction of the 2,2-dimethylpropan-1-ol with SOCl2 converts the alcohol to an alkyl halide. This now reacts with Mg metal to yield a Grignard reagent.

The Grignard reagent reacts with CH3CHO and acid to yield 4,4-dimethylpentan-2-ol as shown in the image attached to this answer.

6 0

3 years ago

What is said to have happened to the electrons in an atom in its ground state absorbs a quantum of energy from light

Rus_ich [418]

Answer:

The electron from the ground state to occupy a next energy level. In this case,we say that the electron is excited

3 0

3 years ago

The acceleration of a runner who accelerates from 0 m/s to 3 m/s in 12s

Naily [24]

4 m/s^2

I hope this helps!

5 0

3 years ago

matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as

Helga [31]

Answer: The answer for this is Compound.

Explanation: A matter is something which occupies space and has some mass.

Elements are defined as the smallest substances which cannot be broken down into another substance by any chemical means.

A compound is a defined as a substance composed of two or more different elements when they combine chemically in definite proportion. For example: $CO_2$ is named as carbon dioxide and is a compound made by combining carbon and oxygen in a fixed ratio of 1 : 2

So, the answer to the given question is compound.

5 0

3 years ago