Carbon and oxygen form no fewer than five different binary compounds. The mass percentages of carbon in the five compounds are as follows: A, 27.29; B, 42.88; C, 50.02; D, 52.97; and E, 65.24. Determine the empirical formulas of the five compounds.

On another planet, the isotopes of titanium have the given natural abundances. Abundance Mass (u) Isotope 46Tİ 73.100% 45.95263 48Ti 19.500% 47.94795 50TI 7.400% 49.94479 What is the average atomic mass of titanium on that planet? average atomic mass = * TOOLS х10

When the supply of oxygen is limited, iron metal reacts with oxygen to produce a mixture of FeO and Fe2O3. In a certain experiment, 20.00 g iron metal was reacted with 11.48 g oxygen gas. After the experiment, the iron was totally consumed, and 3.26 g oxygen gas remained. Calculate the amounts of FeO and Fe2O3 formed in this experiment. A, Mass of FeO =   B. Mass of Fe2O3 =

An element consists of 1.40% of an isotope with mass 203.9730 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.9766 u. a Calculate the average atomic mass. Average atomic mass = 207.216 u The average atomic mass for an unknown element is 1.40% 24.10% 22.10% x 203.9730 u + x 205.9745 u+ x 206.9759 u + 100% 100% 100% 52.40% x 207.9766 u = 2.856 u + 49.640 u + 45.742 u + 108.98 u 100% = 207.22 = 207.2 u b Identify an element.

An engineer has filed for a patent for a brand new allot to be used in golf club heads. The composition by mass ranges from 25 to 31% manganese, 6.3 to 7.8% aluminum , 0.65 to 0.85% carbon, and 5.5 to 9.0% chromium, with the remainder be8ng iron. What are the minimum and maximum percentages of irom possible in this alloy?

3) Calculate the atomic mass of the following element with three isotopes (masses and relative abundances given below). Referring to the periodic table, identify the element. 27.9769 u, 92.2232% 28.9765 u, 4.6858% 29.9738 u, 3.0921%