For the Focusâ first four model years, a 2.0-liter four-cylinder engine was offered and paired with a five-speed manual or a four-speed automatic transmission. Beginning in 2004, a 2.3-liter four-cylinder was also offered. In 2005, Ford refreshed the Focus shuffling trim and equipment offerings with it.
atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units. atomic weight, relative atomic mass. mass - the property of a body that causes it to have weight in a gravitational field. combining weight, eq, equivalent weight, equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen.
The average atomic mass of an element is the weighted average. This means that more weight or importance is given to the isotope which is in greater natural abundance. We know the percentages of each isotope. To do the calculation we will express each percentage as its corresponding decimal fraction.5.58 percent of chlorine atoms are chlorine-35 and 24.22 percent of chlorine atoms are chlorine-37. The average atomic mass = 0.7578 x 34.9689 + 0.2422 x 36.9659 = 35.453 amu. Source(s): pisgahchemist Â· 7 years ago.