What is the coefficient of hydrogen, H 2, when the following equation is balanced? Al + H 2SO 4 → Al 2(SO 4) 3 + ? H 2

3

Explanation:

Balancing the equation:

Original equation: Al + H2SO4 → AL2(SO4)3 + H2

We see that in aluminum in AL2(SO4)3 there is a subscript 2.

We put a 2 in the front of the reactant Al.

We also see a subscript 3 behind (SO4).

We add a 3 in front of H2SO4.

Now we have to balance the H2 on both sides. We add a 3 in front of the H2 on the right as there is 3 H2 molecules on the left.

2Al + 3H2SO4 → AL2(SO4)3 + 3H2

I hope it helps :)

distance, luminosity, brightness, radius, chemical composition, and temperature

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.