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2 years ago

What is the smallest part of all matter

Chemistry

2 answers:

Ostrovityanka [42]2 years ago

7 0

An atom is the smallest part of all matter.

Elenna [48]2 years ago

6 0

An atom does not represent the smallest unit of matter...a quark does. Quarks are the building blocks of atoms.

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Rate at which a chemical substance tends to undergo a chemical reaction

kifflom [539]

Reactivity is the name your looking for I believe.

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2 years ago

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Select all of the answers that apply.

shtirl [24]

The odysseyware answer is the same as his wood manure and food crops

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3 years ago

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A certain substance X has a normal freezing point of -6.4 C and a molal freezing point depression constant Kf= 3.96 degrees C.kg

Brut [27]

Answer: $1.0\times 10^2g$

Explanation:

Depression in freezing point is given by:

$\Delta T_f=i\times K_f\times m$

$\Delta T_f=T_f^0-T_f=(-6.4-(13.6))^0C=7.2^0C$ = Depression in freezing point

i= vant hoff factor = 1 (for non electrolyte like urea)

$K_f$ = freezing point constant = $3.96^0C/m$

m= molality

$\Delta T_f=i\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}}\times \text{weight of solvent in kg}}$

Weight of solvent (X)= 950 g = 0.95 kg

Molar mass of non electrolyte (urea) = 60.06 g/mol

Mass of non electrolyte (urea) added = ?

$7.2=1\times 3.96\times \frac{xg}{60.06 g/mol\times 0.95kg}$

$x=1.0\times 10^2g$

Thus $1.0\times 10^2g$ urea was dissolved.

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3 years ago

Write the balanced oxidation-reduction reaction equation for the oxidation of benzoin by ammonium nitrate. 2

Margarita [4]

Benzoin is an organic compound with the formula PhCH(OH)C(O)Ph. It is a hydroxy ketone attached to two phenyl groups.

To answer your question, the balanced oxidation-reduction reaction equation for the oxidation of benzoin by ammonium nitrate is:

2Ph-C(OH)-C(O)-Ph+NH4NO3 --> 2Ph-C(O)-C(O)-Ph + N2 + 3H2O.

I hope this helps and if you have any further questions, please don’t hesitate to ask again.

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2 years ago

Why is it important to have the International System of Units?

omeli [17]

It can be used by scientists everywhere its important to have the International System of Units.

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3 years ago