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arlik [135]
2 years ago
12

Our daily life would have been almost impossible

Chemistry
1 answer:
vlada-n [284]2 years ago
6 0

Answer:

By observing chemical reactions, we are able to understand and explain how the natural world works. Chemical reactions turn food into fuel for your body, make fireworks explode, cause food to change when it is cooked, make soap remove grime, and much more.

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An iron nail rusts when exposed to oxygen. According to the following reaction, how many grams of iron(III) oxide will be formed
-Dominant- [34]

Answer:

53.2

Explanation:

The balanced reaction is:

2Fe(s) + 3O₂(g) → Fe₂O₃

It means that 3 moles of oxygen form 1 mol of iron(III) oxide. The molar masses are: Fe = 55.8 g/mol and O = 16 g/mol. So

O₂ = 2x 16 = 32 g/mol

Fe₂O₃ = 2x55.8 + 3x16 = 159.6 g/mol

So, 32 g of O₂ corresponds to 1 mol of O₂. The stoichiometry calculus must be (always in moles):

3 mol of O₂ ------------------------ 1 mol of Fe₂O₃

1 mol of O₂  ------------------------ x

By a direct simple three rule:

3x = 1

x = 1/3 mol of Fe₂O₃

The mass is the molar mass multiplied by the number of moles, so:

m = 159.6x (1/3)

m = 53.2 g iron (III) oxide.

6 0
3 years ago
The molecule carbon disulfide CS2 is nonpolar and has only london dispersion forces between the molecules.Carbon tetrachloride C
SSSSS [86.1K]

Answer:- Melting point of [tex[CCl_4[/tex] is higher than CS_2 where as the vapor pressure of CS_2[/tex[ is higher than [tex]CCl_4 .

Explanations:- Since both the molecules are non polar, the forces of attraction for carbon tetrachloride are comparatively stronger as it's a bigger molecule. We know that, stronger are the forces of attraction, higher is the melting point as more heat is required to break the bonds.

Stronger are the forces of attraction, lower is the vapor pressure as the molecules are more tightly bonded and less molecules goes to the gas phase.

So, melting point of carbon tetrachloride is higher but it's vapor pressure is lower as compared to carbon disulfide.

3 0
4 years ago
Read 2 more answers
If 2.40 moles of gas are held at a temperature of 97.0 °C in a container with a volume of 45.0 L, what is the pressure of the ga
Rainbow [258]
PV=nRT<=> P=nRT/V=2,40*R*(273+97)/45 atm.
Calculate it. R is a number that is given, find it and use your math to solve.
7 0
3 years ago
Calculate the energy a wave having a wavelength of 8.921 x 10^-8 cm.<br> HURRY PLZ
Aloiza [94]
It’s d trust I got 100
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3 years ago
According to the graph, which has a larger radius? According to the graph, what is the radius of Saturn?
lakkis [162]

Answer:

Júpiter and 60000 the are the awnsers

3 0
3 years ago
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