Valence electrons determine its valency ? (The group, as in its oxidation state and stability)
Answer:
4 moles
Explanation:
A mole is equal to 6.02214076 × 1023 of any chemical unit (atoms, molecules, ions)
To find number of moles in 89 litres of water vapor use the following formula:
1 mole = 22.4 L
That is 1 L = 
mole
Volume of water vapor = 89 litres
Therefore,
Number of moles in 89 litres = 
≈ 4 moles
The transition metals are 10 columns wide because they can hold no more than 10 electrons. This is why their width correlates with the number of electrons that are included in these metals. Transition metals include most commonly used metals, such as iron, copper, silver, and gold.
The amount of heat (in calories) needed to raise the temperature is 324.885 calories
<h3>How to determine the temperature change </h3>
We'll begin by obtaining the temperature change. This can be obtained as followed:
- Initial temperature (T₁) = 14 °C
- Final temperature (T₂) = 25 °C
- Change in temperature (ΔT) = ?
ΔT = T₂ - T₁
ΔT = 25 - 14
ΔT = 11 °C
<h3>How to determine the heat (in Calories)</h3>
The amount of heat needed to raise the temperature can bee obtaimedals follow:
- Mass (M) = 33 g
- Change in temperature (ΔT) = 11 °C
- Specific heat capacity (C) of diethyl ether = 0.895 cal/g°C
- Heat (Q) =?
Q = MCΔT
Q = 33 × 0.895 × 11
Q = 324.885 calories
Thus, the amount of heat needed is 324.885 calories
Learn more about heat transfer:
brainly.com/question/10286596
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Answer:
As Per Given Information
Given mass of H₂O₂ ( Hydrogen Peroxide) 4.0 gm
We've been asked to find the number of moles in Hydrogen Peroxide .
First we calculate molecular mass of Hydrogen Peroxide .
Molecular mass of H₂O₂ = 1×2 + 16 × 2
Molecular mass of H₂O₂ = 2 + 32
Molecular mass of H₂O₂ = 34 gm
Now find the number of moles in given hydrogen peroxide .
Put the given value we obtain
So, the number of moles is 0.117 .
