the empirical formula is the simplest whole-number ratio of atoms in a compound.
the ratio of atoms is the same as the ratio of moles.
so, our job is to calculate the molar ratio of ca to cl.
mass of ca = 3.611 g
mass of cl = 6.389 g
step 1. calculate the moles of each element
moles of ca = 3.611 g ca × (1 mol ca/(40.08 g ca)= 0.090 10 mol ca
moles of cl = 6.389 g cl
step 2. calculate the molar ratio of the elements
divide each number by the smallest number of moles
ca: cl = 0.090 10: 0.1802 = 1: 2.000
step 3. round the molar ratios to the nearest integer
ca: cl = 1: 2.000 ≈ 1: 2
step 4: write the empirical formula
ef = cacl₂
polymerase chain reaction (pcr) analysis
i would use this technique because it allows you to make millions of precise dna replications from 1 single sample of dna. it also has the advantage of analyzing minuscule sample sizes, even if they are degraded although they must not be contaminated with dna from other sources during the collection, storage, and transport of the sample.
c.ocean winds can carry moisture with them and can bring rain and fog over inland areas