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4 years ago

Fill in the coefficients that will balance the following reaction: a0Fe + a1O2 → a2Fe2O3

Chemistry

2 answers:

egoroff_w [7]4 years ago

6 0

A0=4
a1=3
a2=2
4Fe + 3O2 —> 2Fe2O3

Viktor [21]4 years ago

4 0

Answer: $a_0=4$

$a_1=3$

$a_2=2$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for the given reaction is:

$4Fe+3O_2\rightarrow 2Fe_2O_3$

$a_0=4$

$a_1=3$

$a_2=2$

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When of glycine are dissolved in of a certain mystery liquid , the freezing point of the solution is lower than the freezing poi

Nesterboy [21]

The given question is incomplete. The complete question is:

When 282. g of glycine (C2H5NO2) are dissolved in 950. g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 282. g of ammonium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for ammonium chloride in X.

Answer: the van't Hoff factor for ammonium chloride is 1.74

Explanation:

Depression in freezing point is given by:

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

$\Delta T_f=T_f^0-T_f=8.2^0C$ = Depression in freezing point

$K_f$ = freezing point constant = ?

i = 1 ( for non electrolyte)

m= molality

$8.2^0C=1\times K_f\times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}$

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

Molar mass of solute (glycine) = 75.07 g/mol

Mass of solute (glycine) = 282 g

$8.2^0C=1\times K_f\times \frac{282g}{75.07g/mol\times 0.95kg}$

$K_f=2.07$

ii) $20.0^0C=i\times \times \frac{\text{mass of solute}}{\text{molar mass of solute}\times \text{weight of solvent in kg}}$

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

Molar mass of solute (ammonium chloride) = 53.49 g/mol

Mass of solute (ammonium chloride) = 282 g

$20.0^0C=i\times 2.07\times \frac{282g}{53.49g/mol\times 0.95kg}$

$i=1.74$

Thus the van't Hoff factor for ammonium chloride is 1.74

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Protons and neutrons are made up of tiny particles called quarks.

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A neutron is made of two Down quarks and one Up quark.

The Up quarks possess a 2/3 positive charge while the Down quark possess a 1/3 negative charge.

When we refer that a proton consists of two Up quarks and a Down, this simply means that its net appearance matches this description.

It is thought that quarks themselves are surrounded by gluons.

Gluons are the basic particles underlying the strong interaction between protons and neutrons in the nucleus.

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If our aim is to make 100% pure alum, how could large chunks be bad?

iren [92.7K]

Answer:

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Explanation:

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BlackZzzverrR [31]

Answer:

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