Answer:
2.13g
Explanation:
Atomic mass of CO2 = 12 + 32 = 44g/Mol
Atomic mass of C3H8 = 36 + 8 = 44g/Mol
Reaction
C3H8 + 5O2 --> 3CO2 + 4H2O
3CO2 = 6.39g
Required C3H8 = (6.39/(44 x 3)) x 44 = 2.13g
b. both hydrogen atoms
c. the oxygen atom
d. There is no difference in the electronegativities of the atoms in a water molecule.
The oxygen atom in a water molecule has the greatest electronegativity. Therefore, the correct option is option C.
The tendency of an atom of a particular chemical element could attract shared electrons while forming a chemical bond is represented by the symbol. The electronegativity of an atom is determined both by its atomic number as well as the distance between its valence electrons and the charged nucleus.
The higher the related electronegativity, the more electrons an atom or substituent group attracts. Electronegativity is a simple approach to quantify bond energy as well as the sign and degree of a bond's molecular polarity, that describes a bond all along continuum between covalent through ionic bonding. The oxygen atom in a water molecule has the greatest electronegativity.
Therefore, the correct option is option C.
To learn more about electronegativity, here:
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Answer:
The Oxygen Atom
Explanation:
B) a molar volume
C) the mole ratio
D) Avogadro's number
Hey there!
Molar mass is the mass of one mole of the substance.
The molar mass of carbon-12 is 12 grams, because this is the mass of one mole of the substance.
This means the answer is a) one mole.
Hope this helps!
Answer:A
Explanation:
Answer:
Xe = 0.431 mole
Kr = 0.569 mole
Explanation:
We are asked to calculate the mole fraction of each gas
Let's start from, what is mole fraction?
Mole fraction is the ratio of the number of moles of a substance to the total number of moles of all substance present in the mixture
In this question, we are provided with
Xe - 43.6g
Let's find the number of mole
n = m/Mm
n - number of mole
m - number of mass in grams
Mm - number of molar mass
The molar mass of Xe according to the periodic table is 131.293u
m - is given to be 43.6g
n = 43.6g / 131.293g/mol
n = 0.332mole
Secondly,
Kr - 36.8g
The molar mass of Kr is 83.798
m = 36.8
Using the same formula we used above to find mole
n = 36.8g / 83.798g/mol
n = 0.439mole
Let's calculate the total number of mole in the mixture
Total number of mole = 0.332 + 0.439
= 0.771 mole
To find each mole of each gas in the mixture, using this formula
Mole fraction of a gas = mole of gas A / total mole of the mixture
In Xe = 0.332 / 0.771
= 0.431 mole of Xe in the mixture of the gas
For Kr = 0.439 / 0.771
= 0.569 mole of Kr in the total mixture
Flubber is an example of matter because it is a physical substance (solid) that occupies space.
Flubber is a gelatinous rubbery polymer that is produced by cross-linking a boron compound with polyvinyl alcohol (PVA).
A matter is any physical substance that occupies space and has inertia. Matter is composed of many types of particles that have mass and sizes and it can exist in different states such as solid, liquid and gas.
Flubber is fake rubber. (It rhymes)
And since it is a solid that takes up space, it is matter.
Gallium has the lowest electronegativity.
mass equal to that of a proton; positive charge
B.
mass equal to that of a proton; negative charge
C.
mass 1/1836 that of a proton; positive charge
D.
mass 1/1836 that of a proton; negative charge
B.
mass equal to that of a proton; negative charge