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kicyunya [14]
3 years ago
7

Calculate density of aluminum if 27.6cm^3 has a mass of 74.6g

Chemistry
2 answers:
rjkz [21]3 years ago
6 0
First , 27.6 cm^3 is equal to 27.6 ml

Density = mass g / volume cm^3

= 74.6 / 27.6 = ........ g/cm^3
PolarNik [594]3 years ago
5 0

Answer : The density of aluminium will be, 2.73g/cm^3

Explanation :

Density : It is defined as the mass contained per unit volume.

Formula used for density :

Density=\frac{Mass}{Volume}

Given :

Mass of aluminum = 74.6 grams

Volume = 27.3cm^3

Now put all the given values in the above formula, we get the density of aluminium.

Density=\frac{74.6g}{27.3cm^3}=2.73g/cm^3

Therefore, the density of aluminium will be, 2.73g/cm^3

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2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
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number of moles of NaOH moles reacted = molarity of NaOH x volume
number of NaOH moles = 0.08964 mol/L x 27.86 x 10⁻³ L = 2.497 x 10⁻³ mol
according to molar ratio of 2:1
2 mol of NaOH reacts with 1 mol of H₂SO₄
therefore 2.497 x 10⁻³ mol of NaOH reacts with - 1/2 x 2.497 x 10⁻³ mol of H₂SO₄
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number of H₂SO₄ moles in 1000 mL - 1.249 x 10⁻³ mol / 34.53 x 10⁻³ L = 0.03617 mol 
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