Percent abundance can be calculated by finding the percentage of an isotope compared to another isotope of an element using its relative atomic mass. This is an algebraic process and depends upon several measurements.
Know MoreBecause there are various isotopes of an element, its atomic weight is a calculation of the atomic masses and relative abundances of each isotope of that element. Using algebra, the atomic weights and respective relative abundance percentages of each isotope are multiplied and then added together to find the atomic weight of the element in question.
To accurately measure the atomic mass of an element, a mass spectrometer is used. In this instrument, atoms are positively ionized, accelerated and then deflected by a magnetic field. The amount of deflection is partially determined by the element's atomic mass.
Learn more in Math CalculatorsA case-mix index is calculated by first choosing a period of time, such as a year. The hospital procedures should then be placed in diagnosis-related groups that the hospital billed, and the relative numeric weights should be gathered. Divide the sum of relative weights with the total diagnostic-related groups.
Full Answer >When purifying a substance in chemistry, use (collected mass/starting mass)*100 to calculate percent recovery. This formula is also commonly stated as (pure product recovered/crude material used)*100.
Full Answer >A $15 shirt would cost $12 if it were 20 percent off. The 20 percent discount would come to $3, and subtracting $3 from $15 gives $12.
Full Answer >The percentage of change can be calculated by using one of two formulas. The percentage of increase, or positive change, can be calculated as follows: increase ÷ original number × 100. The percentage of decrease, or negative change, can be calculated according to the following formula: decrease ÷ original number × 100.
Full Answer >