Complete the following Empirical Formula & Molecular Formula problem:2.) A compound containing C and Cl has a molar mass of 284.77 g/mol and an empirical formula of CCl.
Answers
Since the molar mass is provided, it is safe to assume that the empirical formula is not equal to the molecular formula.
We need to get the empirical weight to determine the multiple needed to arrive to the correct molecular formula.
Atom Number in Molecule Atomic Weight Total Mass
C 1 12.0107 12.0107
Cl 1 35.453 35.453
total empirical weight 47.4637
Molecular weight / Empirical Weight
284.77 g/mol / 47.46 g/mol = 6 - the multiple needed to be multiplied with the empirical formula to get the molecular formula.
C has a molecular number of 1 => 1 * 6 = 6 Thus C₆
Cl has a molecular number of 1 => 1 * 6 = 6 Thus Cl₆
Molecular Formula is C₆CL₆
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Balance the following equation. Then determine the mole ratio of Ca(OH)2:Al(OH)3. Al2(SO4)3 + Ca(OH)2 Al(OH)3 + CaSO4
Chlorine melts at 172 k what is chlorines melting point in C
Which of the following alcohols is dehydrated most easily with conc. H²SO⁴? a. p-O²NC⁶H⁴CH(OH)CH³ b. p-C1C⁶H⁴CH(OH)CH³ c. p-CH³OC⁶H⁴CH(OH)CH³ d. C³H⁵CH(OH)CH³
B.iodide-53
C.iodide-127
D.iodine-127
Answers
Explanation:
1) As per the definition of nuclide, it is the atomic spieces (the atom) characterized by the nucleons (protons and neutros).
2) To notation for a nuclide is the name of the atom followed by a hypen (without blank spaces) and the mass number.
3) The mass number is the sum of protons and neutrons.
4) From that, you can tell this about the four choices given:
A.iodine-53: is not correct because that would mean that the mass number is 53, which cannot be right as the atomic number of iodine is 53 meaning that it has 53 protons, and so that notation is not including the neutrons.
B.iodide-53: is not correct because the name of the atom is iodine, not iodide (also the mass number cannot be for the same reason explained above)
The name iodide is reserved for the ions from iodine not for the atom.
C.iodide-127: incorrect due to the name iodide, for the same reason explained above.
D.iodine-127: this is correct choice. It is the name of the isotope of the iodine with mass number 127, which means that the atom has 53 protons and 74 neutrons (53 is the atomic number and 74 is calculated from 127 - 53)
Answer:
iodine-127
Explanation:
I did a quiz and it was correct.
Answers
H2 + O2 => H2O.
Then, balanced, as
2H2 + O2 = 2H2O
There we see that we need 2 times more mol of H2 than O2. So mol of O2 is 1/2 mol of H2. That is 27.4 mol / 2 = 13.7 mol.
Answer:
B
Explanation:
H2 + O2 => H2O.
Then, balanced, as
2H2 + O2 = 2H2O
There we see that we need 2 times more mol of H2 than O2. So mol of O2 is 1/2 mol of H2. That is 27.4 mol / 2 = 13.7 mol.
Answers
Answer : Option B) Hydrogen
Explanation :
All fossil fuels contains hydrocarbons in it. Amongst the given options hydrogen is the correct answer. Except that it contains carbon in it. Hydrocarbons are those class of compounds which contains hydrogen and carbon as element in it.
They are considered to be good fuels because they naturally bring out complete combustion as they contain hydrogen and carbon in its compound form.
Answers
Answer: The pH of the solution is 13.
Explanation:
pOH is defined as the negative logarithm of hydroxide ion concentration present in the solution.
We are given:
Concentration of (Conversion factor:
)
1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions
Concentration of
Putting values in above equation, we get:
We know:
Hence, the pH of the solution is 13.
b. False
Answers
Answer: The given statement is true.
Explanation:
When there occurs changes in organic substrates with the help of enzyme action then this process is known as fermentation. This process results in the formation of alcohols.
For example, process of fermentation occurs in yogurt, pickles, beers, wine etc.
Also equation for alcoholic fermentation is as follows.
Therefore, we can conclude that the given statement process by which complex compounds are broken down by enzymes and by which many organic alcohols are formed is called fermentation, is true.
c. Mass number
d. Twice the number of protons
Answers
The number 84 in the name krypton-84 represent its mass number.
What is Mass number?
The total number of neutrons and protons in an atom are calculated to determine the mass number.
The smallest component of an element, an atom, combines with other atoms to form molecules, which make up the majority of the universe's things.
The total number of protons and neutrons in an atom's nucleus is known as the mass number in nuclear physics. The mass number is frequently used to distinguish between an element's isotopes.
A specific element can only be created from one type of atom, e.g., diamond can only be created from carbon atoms and gold can only be created from gold atoms. Protons, neutrons, and electrons make up the atoms.
Therefore, The number 84 in the name krypton-84 represent its mass number.
To learn more about mass number, refer to the link:
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