Answer:
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Answer:
The original volume of the gas is 0.001 mL
Explanation:
This easy excersise can be solved by the law for gases, about pressure and volume; the volume of a gas is inversely proportional to the pressure it exerts.
We can propose the rule by this formula:
P₁ / V₁ = P₂ / V₂
We replace data given: 1.50 atm / V₁ = 0.50 atm / 750 mL
As the rule says, that volume is inversely proportional, and the pressure was decreased, volume must be lower than 750 mL.
1.5atm / (0.5 atm / 750mL) = V₁
V₁ = 0.001 mL
Since Janice was given a mixture of alcohol and water, her teacher suggested that she use temperature to separate the two substances. The property demonstrated by the experiment is D. boiling. The boiling point refers to the temperature at which the liquid phase of the substance will turn into vapor. Water is known to boil at 100°C at atmospheric pressure while alcohols are generally known to have a boiling point lower than that of water. In this experiment, knowing that the two substances had a significant difference in boiling temperature was crucial to be able to separate them into their pure substances.
Answer:
• the warmth from the sun
• the heat from another a heater
• A cup of hot chocolate
•baking in an oven
Answer:
Explanation:
Given parameters:
Mass of CuCl₂ = 10.5g
Mass of Aluminium = 12.49g
Unknown:
Limiting reactant = ?
Solution:
The limiting reactant is the reactant given in short supply. Such reactant determines and controls the extent of the reaction.
Once they are used up, the reaction ceases to progress.
To find such reactant, we need to have a balanced reaction equation and the number of moles of the reactants:
3CuCl₂ + 2Al → 3Cu + 2AlCl₃
number of moles =
Molar mass of CuCl₂ = 63.5 + 2(35.5) = 134.5g/mol
Molar mass of Al = 27
Number of moles of CuCl₂ = = 0.08moles
Number of moles of Al = = 0.46moles
From the balanced reaction equation;
3 mole of CuCl₂ combined with 2 moles of Al
0.08 mole of CuCl₂ will combine with = 0.05moles of Al
But the given amount of Al is 0.46moles which is in excess.
Therefore CuCl₂ is in the limiting reactant.