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3 years ago

PLEASE HELP

Chemistry

1 answer:

My name is Ann [436]3 years ago

8 0

Answer:

Weather is the condition of Earth’s atmosphere at a particular time and place, whereas climate is the characteristic weather in an area over a long period of time.

Explanation:

Weather and climate are two very important conditions that describes the atmospheric overview of a place.

Weather is reported over a short period of time, it is the condition of the atmosphere at a particular time and place.

Climate is reported over a long period of term. The average weather condition of a place over a long period of time is the climate.

The most important control over the climate of a place is the temperature and amount of precipitation it receives over a period of time.
Weather conditions is reported using more diverse factors such a temperature, pressure, humidity, precipitation, etc.

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You have dissolved 10 g sodium oxide in 200 ml water.calculate concentration of the solution

e-lub [12.9K]

Answer:

0.85 Molar Na2O

Explanation:

Determine the moles of sodium oxide, Na2O, in 10 grams by dividing by the molar mass of Na2O (61.98 g/mole).

(10 g Na2O)/(61.98 g/mole) = 0.161 moles Na2O.

Molar is a measure of concentration. It is defined as moles/liter. A 1 M solution contains 1 mole of solute per liter of solvent. [200 ml water = 0.2 Liters water.]

In this case, we have 0.161 moles Na2O in 0.200 L of solvent.

(0.161 moles Na2O)/(0.200 L) = 0.85 Molar Na2O

8 0

2 years ago

Draw the lewis structure for so42-. How many equivalent resonance structures can be drawn?

Elena-2011 [213]

Answer : The Lewis-dot structure and resonating structure of $SO_4^{2-}$ is shown below.

Explanation :

Resonance structure : Resonance structure is an alternating method or way of drawing a Lewis-dot structure for a compound.

Resonance structure is defined as any of two or more possible structures of the compound. These structures have the identical geometry but have different arrangements of the paired electrons. Thus, we can say that the resonating structure are just the way of representing the same molecule.

First we have to determine the Lewis-dot structure of $SO_4^{2-}$ .

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, $SO_4^{2-}$

As we know that sulfur and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in $SO_4^{2-}$ = 6 + 4(6) + 2 = 32

According to Lewis-dot structure, there are 12 number of bonding electrons and 20 number of non-bonding electrons.

Hence, the Lewis-dot structure and resonating structure of $SO_4^{2-}$ is shown below.

8 0

4 years ago

Your blood contains many dissolved solids. What do you think could be done if you needed to remove the water from a sample of bl

s2008m [1.1K]

Answer:

could the answer be boil the water away?

Explanation:

if the water gets boiled and evaporates, than you are left with the solids

8 0

4 years ago

What does the symbol (–Delta.Hfus) indicate in a phase change?

Rufina [12.5K]

Answer:

changes from a solid to a liquid

Explanation:

8 0

3 years ago

An object has a mass of 18.4g and a volume of 11.2 ml what is the density

DENIUS [597]

Density=mass/volume

Density=18.4g/11.2ml

Density=1.64

Just make sure you include the unit of measurement with your answer.

4 0

4 years ago

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