Answer: 24.1 L of 2.27 M HF will react with 3.70 kg of
Explanation:
The balanced chemical reaction :
To calculate the number of moles, we use the equation:
According to stoichiometry :
1 mole of require = 4 moles of
Thus 13.7 moles of will require= of
To calculate the volume for given molarity, we use the equation:
.....(1)
Molarity of solution = 2.27 M
Volume of solution in L= ?
Putting values in equation 1, we get:
Thus 24.1 L of 2.27 M HF will react with 3.70 kg of
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<u>Answer:</u> The percentage abundance of and isotopes are 77.5% and 22.5% respectively.
<u>Explanation:</u>
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)
Let the fractional abundance of isotope be 'x'. So, fractional abundance of isotope will be '1 - x'
- <u>For isotope:</u>
Mass of isotope = 35 amu
Fractional abundance of isotope = x
- <u>For isotope:</u>
Mass of isotope = 37 amu
Fractional abundance of isotope = 1 - x
Average atomic mass of chlorine = 35.45 amu
Putting values in equation 1, we get:
Percentage abundance of isotope =
Percentage abundance of isotope =
Hence, the percentage abundance of and isotopes are 77.5% and 22.5% respectively.
Answer:
Atoms of the reactant(s) must equal the atoms of the product(s).
Explanation:
According to the Law of Conservation, all atoms of the reactant(s) must equal the atoms of the product(s).
As a result, we need to balance chemical equations. We do this by adding in coefficients to the reactants and/or products. The compound(s) itself/themselves DOES NOT CHANGE.
Answer:
The modern periodic table is used to organize all the known elements. Elements are arranged in the table by increasing atomic number. In the modern periodic table, each element is represented by its chemical symbol. ... Columns of the periodic table are called groups. Elements in the same group have similar properties