An elemental analysis is performed in an unknown compound. it is found to contain 40.0 % mass in carbon, 6.71% mass in hydrogen, and the remaining mass in oxygen. determine its empirical formula. the formula mass of the unknown is independently determined to be 90.08 g/mol, determine the unknown’s molecular formula

Molecular formula will be

Explanation:

If percentage are given then we are taking total mass is 100 grams.

So, the mass of each element is equal to the percentage given.

Mass of C= 40 g

Mass of H = 6.71 g

Mass of O = 100 - (40+6.71 ) = 53.29 g

Step 1 : convert given masses into moles.

Moles of C =

Moles of H =

Moles of O =

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For C =

For H =

For O =

The ratio of C: H: O= 1 : 2: 1

Hence the empirical formula is

The empirical weight of = 1(12)+2(1)+1(16)= 30g.

The molecular weight = 90.08 g/mole

Now we have to calculate the molecular formula:

The molecular formula will be=

Molecular formula will be

more info ? ? i don't understand what the question is

explanation:

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.