The common titanium alloy known as t-64 has a composition of 90 weight% titanium 6 wt% aluminum and 4 wt% vanadium. calculate the concentrations as atomic percents.

Explanation:

Suppose in 100 g of alloy contains 90% titanium 6% aluminum and 4% vanadium.

Mass of titanium = 90 g

Moles of titanium =

Total number of atoms of titanium ,

Mass of aluminum = 6 g

Moles of aluminium =

Total number of atoms of aluminium,

Mass of vanadium  = 4 g

Moles of vanadium=

Total number of atoms of vanadium

Total number of atoms in an alloy =

Atomic percentage:

Atomic percentage of titanium:

:

Atomic percentage of Aluminium:

:

Atomic percentage of vanadium

:

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.