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4 years ago

Identify the events that lead to a lake-effect snow

Chemistry

2 answers:

maria [59]4 years ago

7 0

The First Box Is Cold Wind. The Second Box, At The Top Is Rising Warm Air, The Third Box On The Right is Precipitation As Snow.
~Spades

Mamont248 [21]4 years ago

6 0

<h2>Answer:</h2>

1. Cold air mass

2. Evaporated water conversion to solid water molecules.

3. Snow falling

<h3>Explanation:</h3>

In winters the cold air masses move from cold areas to warm lakes.
Above warm lakes, there are water vapors.
This vapore converted to snow crystals from the cold air masses.
Then these solid water molecules will return to earth in form of the snowflake.

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In which thermochemical equations would the ΔH be considered a heat of solution? 2NaHCO3(s)→Na2CO3 (s) + H2O (g) + CO2 (g), ΔH =

enyata [817]

Answer:

NH4NO3 (s) --> NH4+ (aq) + NO3- (aq) H = +25.7 kJ/mol

Explanation:

Step 1: Data given

2NaHCO3(s) → Na2CO3 (s) + H2O (g) + CO2 (g) ΔH = –129 kJ

C6H6(s) → C6H6(l) ΔH=+9.87 kJ

NH4NO3(s )→ NH4+(aq) + NO3–(aq) ΔH=+25.7 kJ/mol

2C8H18(l) + 25O2(g) → 16CO2(g) + 18H2O(l) ΔH =–5,471 kJ/mol

Step 2:

2NaHCO3(s) → Na2CO3 (s) + H2O (g) + CO2 (g) H = -129 kJ:

This is the decomposition reaction of NaHCO3.

NaHCO3 will break down and form Na2CO3, H2O and CO2

⇒ the heat here is heat of decomposition

C6H6 (s) --> C6H6 (l), H = +9.87 kJ

In this reaction we'll not form a new product. Benzene will change phase. From its solid form to liquid benzene.

⇒ the heat here is heat of fusion

NH4NO3 (s) --> NH4+ (aq) + NO3- (aq) H = +25.7 kJ/mol

When solid NH4NO3 is dossolved in water. it will dissociate in ammonium ion (NH4+) and nitrate ion (NO3-).

This reaction shows a solid dissolving in water and therefore the H represents the heat of solution.

⇒ The heat here is <u>heat of solution</u>

2C8H18 (l) + 25O2 (g) --> 16CO2 (g) + 18H2O (l), H = -5,471 kJ/mol: this is a combustion reaction

This is the combustion reaction of octane. CO2 and H2O will be produced.

⇒ The heat here is heat of combustion.

8 0

4 years ago

Draw the resonance structures for (SCN)".

Phantasy [73]

Answer : The resonance structure of $SCN$ is shown below.

Explanation :

Resonance structure : It is defined as when more than one Lewis structure can be drawn, the molecule or ion is said to have resonance.

Resonance is the concept where electrons (bonds) are delocalized over three or more atoms which cannot be depicted with one simple Lewis structure.

First we have to draw Lewis-dot structure.

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, $SCN$

As we know that sulfur has '6' valence electrons, carbon has '6' valence electrons and nitrogen has '5' valence electron.

Therefore, the total number of valence electrons in $SCN$ = 6 + 4 + 5 = 15

According to Lewis-dot structure, there are 7 number of bonding electrons and 8 number of non-bonding electrons.

In SCN, carbon atom is the central atom and sulfur and nitrogen are the neighboring atoms.

The resonance structure of $SCN$ is shown below.

3 0

4 years ago

Given 0.500 moles of H₂, how many grams of NH₃ would be produced?

Allisa [31]

Answer:

0.333 mol NH₃

Explanation:

N₂ + 3 H₂ ⇆ 2 NH₃

This is the reaction that produces NH₃. Use the mole ratios to solve. For every 3 moles of H₂ that are consumed, 2 moles of NH₃ are produced.

(0.500 mol H₂) × (2 mol NH₃/3 mol H₂) = 0.333 mol NH₃

You will produce 0.333 moles of NH₃.

4 0

3 years ago

What is another name for base? in chemistry

dedylja [7]

Answer:

chemical species

Explanation:

8 0

3 years ago

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What do we need to know about a molecule in order to carry out molarity calculations

professor190 [17]

Answer the type of cell

Explanation:

7 0

3 years ago