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Genrish500 [490]
2 years ago
12

How many ammonium ions, nh4 , are there in 5.0 mol (nh4)2s?

Chemistry
2 answers:
aleksandr82 [10.1K]2 years ago
5 0

<u>Answer:</u> The number of ammonium ions in given moles of ammonium sulfide are 6.022\times 10^{24}  

<u>Explanation:</u>

We are given:

A chemical compound having chemical formula of (NH_4)_2S

In 1 mole of ammonium sulfide, 2 moles of ammonium ions and 1 mole of sulfide ions are present.

According to mole concept:  

1 mole of compound contains 6.022\times 10^{23} number of atoms

So, 5 moles of ammonium sulfide molecule will contain = 5\times 2\times 6.022\times 10^{23}=6.022\times 10^{24} number of ammonium ions.

Hence, the number of ammonium ions in given moles of ammonium sulfide are 6.022\times 10^{24}

olchik [2.2K]2 years ago
3 0
There are two such ions in every molecule
1 mol contains 6.02 * 10^23 things.
1 mol of (NH4)2S  contains 2*6.02 * 10^23 ions (of NH4+ in this case.) = 1.204 * 10^24 ions HN4+

5 mol of (NH4)2S contains 5 * 1.204*10^24 =
6.02 * 10^24 mols NH4+ions <<<<====Answer
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4 0
2 years ago
Use the specific heat capacity that you calculated for granite to determine how many grams of granite at the initial temperature
Valentin [98]

Answer:

Explanation:

specific heat of granite s = .79 J / g / k

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heat lost by granite = heat gained by water

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4 0
2 years ago
How many molecules of carbon dioxide are in 243.6 g of carbon dioxide?
german
Hey there ! 

Molar mass carbon dioxide:

CO2 = 44.01 g/mol

1) number of moles :

1 mole CO2 ------------- 44.01 g
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moles CO2 = 243.6 * 1 / 44.01

moles CO2 = 243.6 / 44.01

=> 5.535 moles of CO2

Therefore:

1 mole -------------------- 6.02x10²³ molecules
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3 0
2 years ago
What is water's density at 93 ∘C? Assume a constant coefficient of volume expansion. Express your answer with the appropriate un
Ganezh [65]

Answer:

982.5 kg/m³

Explanation:

When the temperature of a fluid increases, it dilates, and because of the variation of the volume, it's density will vary too. The density can be calculated by the expression:

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Where ρ₁ is the final density, ρ₀ the initial density, β is the constant coefficient of volume expansion, t₁ the final temperature, and t₀ the initial temperature.

At t₀ = 4°C, the water desity is ρ₀ = 1,000 kg/m³. The value of the constant for water is β = 0.0002 m³/m³ °C, so, for t₁ = 93°C

ρ₁ = 1,000/(1 + 0.0002*(93 - 4))

ρ₁ = 1,000/(1+ 0.0178)

ρ₁ = 982.5 kg/m³

3 0
2 years ago
For a particular reaction, the change in enthalpy is â9kJmole and the activation energy is 13kJmole. The enthalpy change (ÎH) an
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Answer:

The answer is Option a, that is "−9kJmole,5kJmole".

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Please find the complete question in the attached file.

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4 0
2 years ago
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