If you dilute a 20.0 mL of a 3.5M solution to make 90.0 mL solution what is the molality of the dilute solution? Given:

unknown:

show work:

Molality of the diluted sample is 0.778 M

Explanation:

Given -

Molality of the original  solution = 3.5 M

Volume of the original solution = 20 mL

Volume of the diluted solution = 90 mL

Molality of the diluted sample =  X

As we know

Molality of the original  solution * Volume of the original solution = Volume of the diluted solution * Molality of the diluted sample

Substituting the given values, we get -

M

Molality of the diluted sample is 0.778 M

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.