Naturally occurring lithium consists of 90% \( ^7_3Li \te...
Naturally occurring lithium consists of 90% 73Li and 10% 63Li. What is the relative atomic mass of lithium?
6
6.8
6.9
7
7.1
Correct answer is C
the relative atomic mass of lithium = percentage abundance times the mass number of the first isotope + percentage abundance times the mass number of the second isotope.
the relative atomic mass of lithium = ( 90100×7+10100×6) =(( 0.9 x 7) + (0.1 x 6)) = 6.3 + 0.6 = 6.9.
Methane is member of the homologous series called? ...
The function of conc. H2SO4 in the esterification of ethanoic acid with ethanol is to...
Which of the following equilibria is unaffected by a pressure change? ...
Which two gases can be used for the demonstration of the fountain experiment? ...
What is the concentration of H+ ions in moles per dm3 of a sodium of pH 4.398?...
In a flame test for calcium, the flame appears ...
An oxide XO2 has a vapour density of 32. What is the atomic mass of X? ...