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3 years ago

What are the 10 element

Chemistry

1 answer:

maw [93]3 years ago

4 0

hydrogen
oxygen
carbon
nitrogen
fluorine
silicone
boron
argon
cobalt
aluminum

hope it hepls✨

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3 years ago

What is this balanced?<br> Al2O3---> Al+O2

saveliy_v [14]

The balanced equation :

<em>2Al₂O₃⇒ 4Al+3O₂</em>

<h3>Further explanation</h3>

Given

Reaction

Al₂O₃⇒ Al+O₂

Required

Balanced equation

Solution

A chemical reaction is said to be balanced if the number of elements involved in the reaction is the same (either the reactants or the products)

The reaction above is said to be unbalanced because the number of elements Al and O in the reactants and products is not the same.

The balancing step

1. Give a coefficient

Al₂O₃⇒ aAl+bO₂

2. Make an equation

Al, left = 2, right = a⇒a=2

O, left = 3, right = 2b⇒2b=3⇒b=3/2

The equation becomes :

Al₂O₃⇒ 2Al+3/2O₂ x2

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3 years ago

How many molecules are in one mole of NH3?

12345 [234]

Answer:

1 mole of NH3 has 6.023×10^23 molecules.

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3 years ago

Solid potassium chlorate decomposes into solid potassium chloride and oxygen gas. If 2.00 g potassium chlorate decomposes in a c

abruzzese [7]

Answer : The final chamber pressure is 0.746 atm.

Explanation:

First we have to calculate the moles of $KClO_3$ .

Molar mass of $KClO_3$ = 122.5 g/mole

$\text{ Moles of }KClO_3=\frac{\text{ Mass of }KClO_3}{\text{ Molar mass of }KClO_3}=\frac{2.00g}{122.5g/mole}=0.0163moles$

Now we have to calculate the moles of $O_2$ .

The balanced chemical reaction will be:

$2KClO_3\rightarrow 2KCl+3O_2$

From the balanced reaction we conclude that,

As, 2 moles of $KClO_3$ react to give 3 moles of $O_2$

So, 0.0163 moles of $KClO_3$ react to give $\frac{3}{2}\times 0.0163=0.0244$ moles of $O_2$

Now we have to calculate the pressure of gas.

Using ideal gas equation:

$PV=nRT$

where,

P = pressure of gas = ?

V = volume of gas = 0.800 L

T = temperature of gas = $25.0^oC=273+25.0=298K$

R = gas constant = 0.0821 L.atm/mole.K

n = number of moles of gas = 0.0244 mole

Now put all the given values in the ideal gas equation, we get:

$P\times (0.800L)=0.0244mole\times (0.0821L.atm/mole.K)\times (298K)$

$P=0.746atm$

Therefore, the final chamber pressure is 0.746 atm.

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4 years ago

Which type of energy does alpha decay generate?(1 point)

natta225 [31]

,Answer:

kinetic energy, gamma decay, it becomes less stable by repositioning its particles

Explanation:

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3 years ago

What are the 10 element​

What are the 10 element