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3 years ago

HELP ME ON THIS

Chemistry

1 answer:

diamong [38]3 years ago

7 0

Answer:

The attractive force between them decreases

Explanation:

This is because they become localised.

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How many hydrogen atoms are needed to produce two H2O molecules?

skelet666 [1.2K]

Answer:

Explanation:

4 hydrogen and 2 oxygen

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3 years ago

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HELP!

schepotkina [342]

Answer: conducts electricity and heat efficiently, resists melting at high temperatures.

Explanation: Ionic compounds are formed by transference of electrons and leads to generation of cations and anions which are held by strong coloumbic forces. eg: NaCl

Ionic compounds when dissolved in water dissociates into ions and thus are good conductors of heat and electricity.

They are conductors not insulators.

They have very high melting points as they are held by strong coloumbic forces.

They dissociate into ions when dissolved in water.

$NaCl\rightarrow Na^++Cl^-$

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Which substance is a mixture?<br> table salt<br> gasoline<br> aluminum<br> carbon dioxide

omeli [17]

Explanation:

gasoline is your answer

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1. What is the atmospheric layer responsible for long-distance radio communication?

eduard

Answer:

option D= Thermosphere

Explanation:

Thermosphere:

It is the layer of earth which is present above the mesosphere and below the exosphere. In therosphere photoionization of molecules is occur due to U.V radiations and produce the ions in ionosphere.

Ionosphere:

It is present about 60 - 1,000 Km altitude of upper earth atmosphere and it is ionized part of atmosphere. It is present in thermosphere and parts of meso and exosphere. It is also called the extension of thermosphere. Although it is very small region but having great importance. Solar radiations ionized the ionosphere. It has many important role, for example in atmospheric electricity, creating the edge of magnetosphere and in radio communication to the long distance places of earth. The region present just below the ionosphere is termed as neutrosphere or neutral atmosphere.

Layers of ionization:

At the night significant ionization is occur in F layer but the ionization in D and E layer is not significant. In the day time too much heavy ionization is occur in D and E layer. The F layer create an other layer which called F1 and it is weaker ionization region. The ionization in F2 layer is occur day and night and this part is responsible for reflection and refraction of radio waves.

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3 years ago

Suppose you wanted to dissolve 40.0 g NaOH in enough H2O to make 6.00 dm3 of solution

dezoksy [38]

Molarity of solution = 1.6 M

<h3>Further explanation</h3>

Given

40 g NaOH

6 L solution

Required

Steps to solve the problem of molarity

Solution

No additional information about the question.

If you want to make the solution above, then we just need to put the existing NaOH (40 g) into 6 L of water, then do the stirring (in a warm temperature above the hot plate will speed up the NaOH dissolving process)

But if you want to know the molarity of a solution, then