La Nina tends to lead to drier, warmer weather in the southern united states, which causes drought in texas. Which of these is l
2 answers:
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Answer: The empirical formula is and molecular formula is
Explanation:
We are given:
Mass of = 18.95 g
Mass of = 7.759 g
Molar mass of carbon dioxide = 44 g/mol
Molar mass of water = 18 g/mol
For calculating the mass of carbon:
In 44g of carbon dioxide, 12 g of carbon is contained.
So, in 18.59 g of carbon dioxide, = of carbon will be contained.
For calculating the mass of hydrogen:
In 18g of water, 2 g of hydrogen is contained.
So, in 7.759 g of water, = of hydrogen will be contained.
Mass of C = 5.07 g
Mass of H = 0.862 g
Step 1 : convert given masses into moles.
Moles of C =
Moles of H=
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =
For H =
The ratio of C : H = 1: 2
Hence the empirical formula is .
The empirical weight of = 1(12)+2(1)= 14 g.
The molecular weight = 56.1 g/mole
Now we have to calculate the molecular formula.
The molecular formula will be=
Answer: The molar mass of each gas
Explanation:
Mole fraction is the ratio of moles of that component to the total moles of solution. Moles of solute is the ratio of given mass to the molar mass.
Suppose if there are three gases A, B and C.
a)
b)
c)
moles of solute =
Thus if mass of each gas is known , we must know the molar mass of each gas to know the moles of each gas.