24g 4Al+3O2=2Al2O3
27g x(g)
108 96
X=24g
D = m/v. v = (3)^3 = 27.
D = 27/27. D = 1g/cm^3
Answer:
Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Explanation:
<u>Correct Answer:</u><u> Option (A) </u>
H₂S : SO₂ = 2:2 and,
O₂: H₂O = 3:2
Explanation:
The mole ratio is the ratio of coefficients of the compounds involved in the reaction. <u>R</u><u><em>eactants,</em></u><u> as on the left hand side of the chemical reaction which reach to for</u>m new products.
In the given reaction,
2H₂S + 3O₂ ⇒ 2SO₂ + 2H₂O
<u>The reactants are :</u> H₂S (hydrogen sulphide) & O₂ (oxygen)
<u>The products are :</u> SO₂ (sulphur dioxide) & H₂O (water)
- 2 moles of hydrogen sulphide react with 3 moles of oxygen
- 2 moles of sulphur dioxide & 2 moles of water are produced
Therefore correct option is
H₂S : SO₂ = 2:2 and,
O₂: H₂O = 3:2
B. molecule its not mixed with anything and its not combined with any thing and atoms make up everything