Object is placed on a triple beam balance, and a student moves the sliders until it is balanced with the pointer resting at the
zero mark. When the pointer is resting, these are the positions of the sliders:
What is the mass of the object?
340.9 g
493.9 g
439.0 g
934.1 g
What is the mass of the object?
340.9 g
493.9 g
439.0 g
934.1 g
2 answers:
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The standard ambient temperature and pressure are
Temperature =298 K
Pressure = 1atm
The density of gas is 1.5328 g/L
density = mass of gas per unit volume
the ideal gas equation is
PV = nRT
P = pressure = 1 atm
V = volume
n = moles
R= gas constant = 0.0821 Latm/mol K
T = 298 K
moles = mass / molar mass
so we can write
n/V = density / molar mass
Putting values
Thus molar mass of gas is 37.50g/mol