Is a nissan altima 2003 a 6 cylinder car?

The human body excretes nitrogen in the form of urea, NH₂CONH₂. The key step in its biochemical formation is the reaction of wat

Misha Larkins [42]

Mass perventage of nitrogen in urea, arginine, ornithine is 46.67%, 32.2%,21% respectively.

What is Mass perventage ?

Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Mass percentage is calculated as the mass of a component divided by the total mass of the mixture, multiplied by 100.

Molecular mass of urea (NH2CONH2) is= 2× (Atomic mass of N ) + 4 × (Atomic mass of H) + (Atomic mass of C) (Atomic mass of O) = 60

Mass percentage of N = $Total mass of N atoms in the compoundMass of compound×100=2860×100=46.67%$

chemical formula for arginine is C6H14N4O2

molar mass of C6H14N4O2=174g/mol

moles of N atoms in C6H14N4O2=4

mass of N atoms=14*4=56g

mass percent of N in C6H14N4O2=(56/174)*100=32.2%

the chemical formula for ornithine is C5H12N2O2

molar mass of C5H12N2O2=132g/mol

moles of N atoms in C5H12N2O2=2

mass of N atoms in C5H12N2O2=2*14=28

mass percent of N in C5H12N2O2=(28/132)*100=21%

To learn more about urea click on the link below:

brainly.com/question/17812875

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7 0

1 year ago

Which is a cause of polarity in water molecules? partial negative charge on the hydrogen atoms partial positive charge on the ox

Tamiku [17]

Explanation:

Water is a polar solvent as the hydrogen and oxygen atom has large difference in their electronegativities.

Oxygen atom is highly electronegative as compared to hydrogen atom therefore, it pulls the electrons of hydrogen atom closer towards itself.

As a result, two poles will create forming a partial positive charge on the hydrogen atom and partial negative charge on the oxygen atom.

Thus, we can conclude that high electronegativity difference between oxygen and hydrogen is the cause of polarity in water molecules.

7 0

3 years ago

CAN ANYONE SHARE 10 MEMES AND BAG THE BRAINLISST

Semmy [17]

*clink* a toast *clink* a toast *clink* a toast *clink* *clink*

5 0

3 years ago

Read 2 more answers

Which statement is true about A nickel-cadmium dry cell?

marusya05 [52]

Answer:

The cathode reaction is NiO2+H2O+2e−→Ni(OH)2+2OH−.

4 0

2 years ago

The pH of a 0.15 M butylamine, C&H3NH2 solution is 12.0 at 25°C. Calculate the dissociation

Dmitrij [34]

The dissociation constant of the base : 7.4 x 10⁻⁴

<h3>Further explanation</h3>

Butylamine, C4H9NH2 Is A Weak Base

Kb is the dissociation constant of the base.

LOH (aq) ---> L⁺ (aq) + OH⁻ (aq)

$\rm Kb=\dfrac{[L][OH^-]}{[LOH]}$

[OH⁻] for weak base can be formulated :

$\tt [OH^-]=\sqrt{Kb.M}$

pH of solution : 12

pH+pOH=14, so pOH :

14-12 = 2, then :

$\tt [OH^-]=10^{-pOH}\\\\(OH^-]=10^{-2}$

the the dissociation constant (Kb) =

$\tt 10^{-2}=\sqrt{Kb.0.15}\\\\10^{-4}=Kb\times 0.15\\\\Kb=\dfrac{10^{-4}}{0.15}=6.6\times 10^{-4}$

Or you can use from ICE method :

C4H9NH2(aq) + H2O(l) ⇌ C4H9NH3+(aq) + OH-(aq)

0.15

x x x

0.15-x x x

$\tt Kb=\dfrac{x^2}{0.15-x}\rightarrow x=[OH^-]\\\\Kb=\dfrac{10^{-4}}{0.15-10^{-2}}=7.14\times 10^{-4}$

6 0

3 years ago