A compound is 44.7% P and the rest O. Determine its emperical formula.
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Answer:
P₅O₁₂
Explanation:
Assume that you have 100 g of the compound.
Then you have 44.7 g P and 55.3 g O.
1. Calculate the moles of each atom
Moles of P = 44.7 × 1/30.97 = 1.443 mol Al
Moles of O = 55.3 × 1/16.00 = 3.456 mol O
2. Calculate the molar ratios.
P: 1.443/1.443 = 1
O: 3.456/1.443 = 2.395
3. Multiply by a number to make the ratio close to an integer
P: 5 × 1 = 5
O: 5 × 2.395 = 11.97
3. Determine the empirical formula
Round off all numbers to the closest integer.
P: 5
O: 12
The empirical formula is P₅O₁₂.
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law and Charles's law.
Gay-Lussac's Law Charles's Law
O involves changes in temperature
O has a constant volume
O shows an inversely proportional relationship
O does not involve pressure changes
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Answer:
A) involves changes in temperature
Explanation:
The figure is missing, but I assume that the region marked X represents the region in common between Gay-Lussac's law and Charle's Law.
Gay-Lussac's law states that:
"For an ideal gas kept at constant volume, the pressure of the gas is directly proportional to its absolute temperature"
Mathematically, it can be written as
where p is the pressure of the gas and T its absolute temperature.
Charle's Law states that:
"For an ideal gas kept at constant pressure, the volume of the gas is directly proportional to its absolute temperature"
Mathematically, it can be written as
where V is the volume of the gas and T its absolute temperature.
By looking at the two descriptions of the law, we see immediately that the property that they have in common is
A) involves changes in temperature
Since the temperature is NOT kept constant in the two laws.
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Answer:
When Iron powder and Sulfur powder are mixed, no chemical reaction will occur, so you will see a physical change. The heterogeneous mixture resulting from mixing Iron powder with Sulfur powder could be easily separated using a magnet. When heating both compounds; however, it is possible to observe a chemical change as Iron Sulfide is formed. This product looks dark, shiny and is solid.
b. 0.306g
c. 3.26g
d. 765mL
Answers
Answer:
Option A. 765g
Explanation:
From the question given, we obtained the following:
Density = 15.3 g/mL
Volume = 50mL
Mass =?
Density = Mass /volume
Mass = Density x volume
Mass = 15.3 x 50
Mass = 765g