Answer:
0.0345kg is the mass of 25L of the sample
Explanation:
Hydrophosphoric acid, H₃P = Phosphine has a density of 1.38g/L.
To solve this question we need to convert the volume of the gas to mass in grams as first and then to kilograms as follows:
<em>Mass in grams:</em>
25L * (1.38g / L) = 34.5g
<em>Mass in kilograms:</em>
34.5g * (1kg / 1000g) = 0.0345kg is the mass of 25L of the sample
Alloys are metallic compounds composed of one metal and one or more metal or non-metal element.
Alloys are useful because they allow us to maximize the desired properties within certain constraints in a way that is appropriate for the intended use.
A ..............................
Answer: The helium pressure is 799 torr.
Explanation:
It is known that 1 mm Hg is equal to 1 torr. As we are given an open-ended mercury manometer so, its pressure will also be equal to the atmospheric pressure which is given as 752 torr.
And, it is given that pressure of mercury level in the open arm is 47 mm above that in the arm connected to the flask of helium. Therefore, adding both the pressures we will get the pressure of helium as follows.
(752 + 47) mm Hg
= 799 mm Hg
or, = 799 torr
Thus, we can conclude that the helium pressure is 799 torr.