Chemistry, 17.01.2020 06:31 greatsavagebeast

1. the most important nutrients (biomolecules) found in living things are:

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Answer from: adrianawalker16

The most important nutrients (Biomolecules) found in living things are:

Carbohydrates ,Proteins , Nucleic acid , lipids etc.

Explanation:

1. Carbohydrates :

Some common examples of carbohydrates are : Sugar . Glucose , starch etc.

They are defined as optically active polyhydroxy aldehyde or ketones. They are classified into three main categories:

a). Monosaccharide : These are smallest carbohydrates which can not be hydrolysed .Example : Glucose

b) Oligosaccharide : Examples of such carbohydrates are mannose and sucrose

c). Polysaccharide : examples of such carbohydrates are : Starch , cellulose

2. Proteins : The chief source of protein are : milk , cheese , pulses,peanut etc

They occur in every part of the body and very necessary for the life processes.

Proteins are the polymers of amino acids.

There are two types of amino-acid :

Essential amino acid : Those amino acids which are not synthesized by the body but must be required by the body . example : Histidine

Non - essential : Which are synthesized by the body. example :Serine

3. Nucleic Acid : Nucleic acid are responsible for transfer of character from parents to off-springs. There are two type of nucleic acid :

DNA = Deoxy ribo nucleic acid

RNA = Ribo nucleic acid

Answer from: Quest

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

Answer from: Quest

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = $25^oc$ = 298 k $)0^oc=273kelvins$

$o_3+3no\rightarrow 3no_2,\delta h_{reaction}=? [/)</p><p>[tex]\delta h_{no}=90.4kj/mol$

$\delta h_{no_2}=33.85kj/mol$

$\delta h_{o_3}=142.2kj/mol$

$\delta h_{reaction}=\sum \delta h_{products}-\sum\delta h_{reactants}=3\times\delta h_{no_2}-(3\times \delta h_{no}+\delta h_{o_3})$

$\delta h_{reaction}=33.85-(90.4+142.2)=-311.85kj/mol$

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

$v_{no}=12.00 l,v_{o_3}=8.50 l$

$pv_{no}=n_{no}rt=1atm \times 12.00 l=n_{no}\times 0.0821 atml/k mol \times 298 k$

$n_{no}=0.49 moles$

$pv_{o_3}=n_{o_3}rt=1atm \times 8.50 l=n_{o_3}\times 0.0821 atml/k mol \times 298 k$

$n_{o_3}=0.34 moles$

according to reaction 3 moles no are reacting with 1 mol of $o_3$ ,then 0.49 mol of no will react with $\frac{1}{3}\times 0.49$ moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and $o_3$ is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

$\delta h_{reaction}\times \text{moles of no}=-311.85kj/mol\times 0.49 mol=-152.80kj/mol$

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