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3 years ago

What method(s) do plants use to obtain nitrogen? Select all that apply

Chemistry

2 answers:

slavikrds [6]3 years ago

6 0

Answer:

plants obtain nitrogen through their roots.it is present in the soil in the form of nitrogen containing compounds.it can also be obtained from the ground water containing minerals with nitrogen in it.

Explanation:

morpeh [17]3 years ago

4 0

absorb nitrogen from water taken in at the roots hope its help

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3 years ago

The average atomic weight of oxygen (O) is 15.9994 amu. It has three naturally occurring isotopes, 16 O, 17 O and 18 O, and 0.03

olganol [36]

Answer:

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Explanation:

The average atomic weight of oxygen is defined as:

Average = Abundance 16O * 15.995amu + Abundance 17O * 16.999amu + Abundance 18O * 17.999amu

As average is 15.9994 amu and abundance of O17 = 0.037% = 3.7x10⁻⁴ we can write:

15.9994amu = Abundance 16O * 15.995amu + 3.7x10⁻⁴* 16.999amu + Abundance 18O * 17.999amu

15.9931 = Abundance 16O * 15.995amu + Abundance 18O * 17.999amu (1)

The abundance of each isotope = 1:

1 = Abundance 16O + Abundance 17O + Abundance 18O

1 = Abundance 16O + 3.7x10⁻⁴ + Abundance 18O

0.99963 = Abundance 16O + Abundance 18O (2)

Replacing (2) in (1):

15.9931 = (0.99963 - Abundance 18O) * 15.995amu + Abundance 18O * 17.999amu

15.9931 = 15.9891 - 15.995Abundance 18O + 17.999Abundance 18O

4.0182x10⁻³ = 2.004Abundance 18O

2.005x10⁻³ = Abundance 18O = 0.201%

Thus, abundance of 16O in percentage is:

Abundance 16O = 100 - 0.201% - 0.031%

<h3>Abundance 16O = 99.768%</h3>

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3 years ago