Answer:
73.2g
Explanation:
The reaction expression is given as:
P₄ + 6Cl₂ → 4PCl₃
Given parameters:
Volume of chlorine gas = 79.2L
Unknown:
Mass of Phosphorus needed = ?
Solution:
To solve this problem, let us find the number of moles of the chlorine gas.
Since the condition of the reaction is at STP;
22.4L of gas is contained in 1 mole
79.2L of chlorine gas will contain 
= 3.54mole
From the reaction expression;
6 moles of chlorine gas will react with 1 mole of P₄
3.54 mole of chlorine gas will completely react with 
= 0.59mole of P₄
Mass of P₄ = number of moles x molar mass
Molar mass of P₄ = 4 x 31 = 124g/mol
Mass of P₄ = 0.59 x 124 = 73.2g
Answer:
3843.96 × 10²³ atoms
Explanation:
Given data:
Mass of Li = 4430 g
Number of atoms = ?
Solution:
We will calculate the number of moles first.
Number of moles =mass/molar mass
Number of moles = 4430 g/ 6.94 g/mol
Number of moles = 638.32 mol
1 mole contain 6.022 × 10²³ atoms
638.32 mol × 6.022 × 10²³ atoms / 1 mol
3843.96 × 10²³ atoms
You have to divide them by each other
Methane gas, which may be present in confined spaces such as a basement, can cause death by asphyxiation.
<h3>
What are the dangers of methane gas in confined space?</h3>
Low amounts are safe for inhalation. A significant amount can replace oxygen in the atmosphere. Reduced oxygen availability can cause symptoms like weariness, emotional instability, fast breathing, and rapid heart rate. Insufficient oxygen can cause nausea, vomiting, collapse, convulsions, coma. The onset of symptoms is accelerated by physical activity. Organs including the heart and brain can suffer long-term damage from a lack of oxygen.
Contact with Skin: Not irritating. The skin might become chilled or frozen when in direct touch with the liquid gas (frostbite). Itching and numbness are signs of mild frostbite. Burning and rigidity are signs of more serious frostbite.
No evidence of carcinogenicity.
learn more about methane gas refer:
brainly.com/question/25649765
#SPJ4
1. slowly heat stubstance.
2. once the substance is at the most liqued state take the temp. that's the melting point of that subtance.
hope that helps, any other questions feel free to DM me dont wate your points. :)
