2. How many moles of each element are found in 1 mole of C7H14O2? Write the mole ratio for each element. please can someone help me w this one

What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn

This is a mixture that has the same composition throughout.

Lewis structure and molecular geometry for nh2cl