An hour is 60 minutes. So you multiple the hot by 60. You get 180 minutes plus the 75 remaining minutes. The answer is 255
We use the Boyle's law to solve this question. At constant temperature, the volume of a fixed mass of a gas is inversely proportional to its pressure. When comparing the fixed mass of gas at different conditions under this law, the expression below is used.
P₁V₁=P₂V₂
P₁=5.0 atm
P₂=7.0atm
V₁=3.5 L
V₂=V
5.0×3.5=7.0×V
V= (5.0×3.5)7.0
V=2.5 L
Explanation:
- A homogeneous mixture is defined as the mixture in which solute particles are evenly distributed into a solvent.
For example, iced tea with no ice is a homogeneous mixture.
Also, a cheddar cheese contains even distribution of solute particles. Hence, it is also a homogeneous mixture.
- On the other hand, a mixture in which solute particles are unevenly distributed in a solvent is known as a heterogeneous mixture.
For example, both rocky road ice cream and trail mix are heterogeneous mixture.
Answer:
145.78g/mol
Explanation:
Let the time taken for the two gas to effuse be x
For O2:
Volume = 6.51mL
Time = x
Rate (R1) = volume/time
R1 = 6.51/x
For the unknown gas:
Volume = 3.05mL
Time = x
Rate (R2) = Volume/time
R2 = 3.05/x
Now, we can obtain the molar mass of the unknown gas as follows:
R1 = 6.51/x
M1 (O2) = 16 x 2 = 32g/mol
R2 = 3.05/x
M2(unknown gas)
R1/R2 = √(M2/M1)
(6.51/x)/(3.05/x) = √(M2/32)
6.51/3.05 = √(M2/32)
Take the square of both side
(6.51/3.05)^2 = M2/32
Cross multiply to express in linear form:
M2 = (6.51/3.05)^2 x 32
M2 = 145.78
Therefore, the molar mass of the unknown gas is 145.78g/mol
In three hours and twenty minutes from 1:40 will be 5:00