Answer:
Volcanoes form when magma from earth's upper mantle moves its way up to the surface. When the magma is all the way up the surface, it erupts and makes lava while at the same time, ash deposits. Once the volcano continues to erupt even more it starts getting bigger and bigger.
Explanation:
Answer:
1 mol of CH₄ will contain greatest mass of the oxygen i.e 4 grams
Explanation:
Given;
1 mol of CH₄
0.6 mol of C₆H₆
0.4 Mol of C₃H₈.
Now,
moles = Mass / Molar mass
Thus,
for 1 mol of CH₄
1 = mass / ( 12 + 4 × (1) )
or
mass = 16 grams
now,
16 grams of CH₄ contains 4 grams of hydrogen
and, for 0.6 mol of C₆H₆
0.6 = Mass / ( 12 × 6 + 6 × 1)
or
Mass = 46.8 grams
Now,
78 grams of CH₄ contains 6 grams of hydrogen
thus,
46.8 grams of CH₄ will contain = (6 / 78) × 46.8 grams of hydrogen
or
46.8 grams of CH₄ will contain = 3.6 grams of hydrogen
and, for 0.4 Mol of C₃H₈
0.4 = mass / (3 × 12 + 8 × 1)
or
Mass of 0.4 Mol of C₃H₈ = 17.6 grams
Now,
44 grams of C₃H₈ contains 8 grams of hydrogen
thus,
17.6 grams of C₃H₈ will contain = ( 8 / 44 ) × 17.6 grams of hydrogen
or
17.6 grams of C₃H₈ will contain = 3.2 grams of hydrogen
Hence,
1 mol of CH₄ will contain greatest mass of the oxygen i.e 4 grams
D=m/v
so 37.4/(2.2x10^5)= 1.7x10^-4 grams per litter
A hypothesis is a prediction of what you believe to be true.
Answer:
The correct answer is option b.
Explanation:
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Mass of isotope X-28 = 27.979 amu
Percentage abundance of isotope X-28 = 92.21%
Fractional abundance of isotope X-28 = 0.9221
Mass of isotope X-29 = 28.976 amu
Percentage abundance of isotope X-29 = 4.70%
Fractional abundance of isotope X-29 = 0.047
Mass of isotope X-30= 29.974 amu
Percentage abundance of isotope X-30 = 3.09%
Fractional abundance of isotope X-30 = 0.0309
Putting values in equation 1, we get:
The atomic weight of X is 28.09 amu.