The molar mass of vanadinite is 1416.27 g/mol. Looking at
the molecular formula we can see that there is 1 mole of Cl for every mole of
vanadinite. Therefore:
mass percent = [(1 mole Cl * 35.45 g/mol) / (1 mole
Pb5(VO4)3Cl * 1416.27 g/mol)] * 100%
<span>mass percent = 2.50%</span>
Sedimentary rocks because they are made of the remains of plants and animals which were compressed over time :)
Answer:
298 kPa
Explanation:
Data Given:
initial Volume of oxygen V1= 48.0 L
Final Volume of oxygen V2= 16.0 L
initial pressure of oxygen P1= 99.3 kPa
initial Pressure of oxygen P2= ?
Solution:
The Boyle's law formula will be applicable here at constant temperature
Boyle's law formula
P1V1 = P2V2
As we have to find final pressure so rearrange the equation
P2 = P1V1 /V2 ....................(1)
Put values in Equation 1
P2 = 99.3 kPa x 48 L /16 L
P2 = 298 kPa
So the final pressure will be 298 kPa
Answer:
462g
Explanation:
First, let us calculate the molar mass of Cu(CN)2. This is illustrated below:
Molar Mass of Cu(CN)2 = 63.5 + 2(12+14) = 63.5 + 2(26) = 63.5 + 52 = 115.5g/mol
Number of mole of Cu(CN)2 given from the question = 4moles
Mass = number of mole x molar Mass
Mass of Cu(CN)2 = 4 x 115.5
Mass of Cu(CN)2 = 462g