CHEMISTRY HIGH SCHOOL

the mass of empty cylinder is 20 gram its mass when its filled completely with water is 30 gram and its mass when its filled completely with unknown liquid is 27 gram find the density of, the unknown liquid ​

Answers

Answer 1
Answer:

Answer:

≈ 0.70 g/cm³ (answer rounded up to 2 decimal places)

Explanation:

The mass of empty cylinder is 20g

The mass of water filling the cylinder = 30g - 20g = 10g

The mass of unknown liquid filling the cylinder = 27g - 20g = 7g

Density of water = 997 kg/m³

Converting this density to g/cm³ we get;

1kg = 1000g , 1m³ = 1000000cm³

So density = (997000)/(1000000) g/cm³ = 0.997 g/cm³

So the volume of water occupied by 10g is;

10 × 0.997 = 9.97 cm³

This volume is also occupied by 7g of the unknown liquid.

Density = mass/volume

Density of the unknown liquid = 7g ÷ 9.97cm³ = 0.702106319 g/cm³ ≈ 0.70 g/cm³ (answer rounded up to 2 decimal places)

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The cenozoic era is also referred to as the

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The capacity of a muscle to continue contracting over a period of time without fatigue is called: A. muscular strength.
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What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution?1.81 M
201 M
5.52 M

Answers

1.       There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

 

Molarity = 612 g (1 mol / 110.96 g) / 3.04 L

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Answers

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Does sodium have a positive or negative charge after ionization?

Answers

Explanation:

Sodium has atomic number of 11 with electronic configuration of :

[Na]=1s^22s^22p63s^1

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In which compound does chlorine have the highest oxidation number?(1) NaClO (3) NaClO3(2) NaClO2 (4) NaClO4

Answers

Answer:

              NaClO₄

Solution:

Let us calculate the oxidation state of Chlorine in each compound one by one;

1) NaClO

               O.N of Na = +1

               O.N of O = -2

So,

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2) NaClO₃

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               (+1) + (Cl) - 6 = 0

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3) NaClO₂

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4) NaClO₄

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               1 + Cl - 8 = 0

               Cl = -1 + 8

               Cl = +7
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