A sample of a substance has a mass of 27.3 grams and a volume of 7.0 centimeters3. The density of this substance is _____ grams/
2 answers:
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Answer: 2 moles
Explanation:
STP is Standard Temperature and Pressure. That means the pressure is 1.00 atm and the temperature is 273K. Since the oxygen is placed in the same container, we can use Ideal Gas Law to figure out what container the CO₂ used.
Ideal Gas Law: PV=nRT
P=1.00 atm
n=moles
R=0.08206 Latm/Kmol
T=273K
CO₂
Since we know that CO₂ has a 44.8 L container, we can use that to find the moles of oxygen.
There are 2 mol of oxygen.
Answer:
Therefore, the rate of change in the amount of salt is
Explanation:
Given:
Initial volume of water lit
Flowing rate = 5
The rate of change in the amount of salt is given by,
( Rate of salt enters tank - rate of sat leaves tank )
Since tank is initially filled with water so we write that,
Let amount of salt in the solution is ,
Therefore, the rate of change in the amount of salt is