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2 years ago

Ehat coefficient would go in the box

Chemistry

1 answer:

Natalija [7]2 years ago

8 0

Answer:

1.nhl

Explanation:

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Why did the laser beam move when the magnet was placed near it

podryga [215]

No because the light can only produce the color the manufacturer gave it and it is thin air unless the laser beam was able to make things on fire then the substance would be called a gas

4 0

3 years ago

Please help me fast!!

Julli [10]

Answer:

Exothermic.

Explanation:

The formation of ammonia from nitrogen and hydrogen is exothermic reaction.

Three moles of hydrogen react with one mole of nitrogen and form two moles of ammonia and some amount of energy is also released.

Chemical equation:

N₂ + 3H₂ → 2NH₃+ energy

Exothermic reaction:

The type of reactions in which energy is released are called exothermic reactions.

In this type of reaction energy needed to break the bonds are less than the energy released during the bond formation.

For example:

Chemical equation:

C + O₂ → CO₂

ΔH = -393 Kj/mol

it can be written as,

C + O₂ → CO₂ + 393 Kj/mol

5 0

3 years ago

This atomic particle has so little mass that scientists do not even consider it when determining

pashok25 [27]

Answer:

b. the electron

Explanation:

Electrons are extremely small. The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom.

3 0

3 years ago

Given the balanced equation representing a reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) How many moles of Al(s) react completely with 4

Paladinen [302]

We must consider the relation between Al and $O_2$ :

$\frac{3\ mol\ O_2}{4\ mol\ Al} = \frac{4,5\ mol\ O_2}{x}\ \to\ x = \frac{4,5\ mol\ O_2\cdot 4\ mol\ Al}{3\ mol\ O_2} = \bf 6\ mol\ Al$

As you can see, the number of moles of Al is double to the number of moles of $Al_2O_3$ , keeping constant the proportion of both substances.

5 0

3 years ago

Gaseous hydrogen iodide is placed in a closed 1.0 L container at 425°C, where it partially decomposes to hydrogen and iodine in

Pie

Answer:

ΔG° = 23192 J/mol

Explanation:

For the reaction:

2 HI (g) ⇌ H₂(g) + I₂(g)

It is possible to find Kp thus:

Kp = P(H₂) P(I₂) / P(HI)²

Replacing:

Kp = 4,79x10⁻⁴ × 4,79x10⁻⁴ / (3,53x10⁻³)²

Kp = 0,0184

As moles of products (2) are the same moles of reactants, Kp = K

It is possible to find ΔG° from K, thus:

ΔG° = -RT ln K

where R is 8,314472J/molK, temperature in kelvin is 425 + 273,15 = 698,15K and K is 0,0184

Replacing:

ΔG° = -8,314472J/molK × 698,15K ln 0,0184

ΔG° = 23192 J/mol

I hope it helps!

8 0

3 years ago

Ehat coefficient would go in the box​

Ehat coefficient would go in the box