Chemistry, 21.01.2020 23:31, Spoiledgirl2905

The empirical formula for a compound is ch2o, and the molar mass is 180.2 g/mol. which is the molecular formula for this compound? a) c6h12o6
b) c7h16o5
c) c8h20o4
d) c3h6o3

Answers: 3

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answered: skiddymark3ox93za

Answer : The correct option is, (A) $C_{6}H_{12}O_6$

Explanation :

Empirical formula : It is the simplest form of the chemical formula which depicts the whole number of atoms of each element present in the compound.

Molecular formula : it is the chemical formula which depicts the actual number of atoms of each element present in the compound.

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

As we are given that the empirical formula of a compound is CH_2O and the molar mass of compound is, 180.2 gram/mol.

The empirical mass of CH_2O = 1(12) + 2(1) + 1(16) = 30 g/eq

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

$n=\frac{180.2}{30}=6$

Molecular formula = $(CH_2O)_n=(CH_2O)_6=C_{6}H_{12}O_6$

Thus, the molecular formula of the compound will be, $C_{6}H_{12}O_6$

answered: Guest

Answer: abeexplanation:

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

answered: Guest

About 8 gallons of fuel will be used. (8.08)

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The empirical formula for a compound is ch2o, and the molar mass is 180.2 g/mol. which is the molecu...