Answer:
In the case of the blackish-yellow powder, the black color is due to the presence of a iron and yellow color is due to sulfur. As the iron has retained its original properties it has got attached to the magnet. Thus the blackish-yellow powder is considered a mixture.
Explanation:
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Answer:
The value is 
Explanation:
From the question we are told that
The saturation density of air is 
The temperature for this saturation density to occur 
The relative humidity at this temperature is 
Generally the relative humidity is mathematically represented as
Here H represents humidity
=> 
=> 
=>
Ohm's law states that the voltage within an electrical circuit is equal to the product of the current and the voltage. Mathematically it is written as V=IR where V is the voltage, I is the current and R is the resistance. If a circuit has a voltage of 9.0 Volts and a resistance of 36.0 Ohms, the current is I = V / R = 9.0/36.0 = 0.25 Amps.
Answer:
70.35%
Explanation:
The relative humidity is a percentage and is the ratio between the partial pressure of water and the vapor pressure of water times 100% The partial pressure gives you an idea of the amount of water in the air whereas the vapor pressure is related with the maximum amount of water that can be in the air for a given temperature.
Vp(h2o) -> Vapor pressure of water
p(h2o) -> Partial pressure of water
RH -> Relative humidity
Vp(h20) at 22°C = e^(20.386 - (5132 / (temperature + 273)) = 19.9 Torr
(1 Torr == 1 mm Hg)
RH = p(h2o)/Vp(h2o)*100% = (14/19.9)*100% = 70.35%
Note: The formula used to find the vapor pressure of water is an approximation, to get a better value you could use a table to determine the vapor pressure of water at a certain temperature. Remember that Vp(h2o) is a constant for a given temperature.
