Answer:
3.74 x 10²² particles
Explanation:
Given parameters:
Mass of compound = 1.43g
Molar mass of compound = 23g
Unknown:
Number of particles of sodium = ?
Solution:
To find the number of particles of Na in the compound, we need to obtain the mass of sodium from the total mass given;
Mass of sodium = 
= 
= 1.43g
Now find the number of moles of this amount of Na in the sample;
Number of moles = 
= 
= 0.062mole
Now;
1 mole of substance = 6.02 x 10²³ particles
0.062 mole of substance = 0.062 x 6.02 x 10²³ particles
= 3.74 x 10²² particles
Explanation:
The solution of the lactic acd and sodium lactate is referred to as a buffer solution.
A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. In this case, the weak acid is the lactic acid and the conjugate base is the sodium lactate.
Buffer solutions are generally known to resist change in pH values.
When a strong base (in this case, NaOH) is added to the buffer, the lactic acid will give up its H+ in order to transform the base (OH-) into water (H2O) and the conjugate base, so we have:
HA + OH- → A- + H2O.
Since the added OH- is consumed by this reaction, the pH will change only slightly.
The NaOH reacts with the weak acid present in the buffer sollution.
No technically without buying anything your hair will not grow .
The volume increases and the final volume is 2.1 L
<h3>Why volume increases?</h3>
The volume of a gas is directly related to the heat and pressure. If temperature increases, volume increases.
If pressure increases, volume decreases
Based on Boyle's law,
The absolute temperature of a gas is directly proportional to the volume of the gas.
As the balloon change increases its temperature, the volume increases
The Boyle's equation is:
V₁T₂ = V₂T₁
Where,
- V is volume
- T is absolute temperature of 1, initial state and 2, final state of the gas.
Replacing :
V₁ = 2.0L
T₂ = 35°C + 273.15 = 308.15K
V₂ = ?
T₁ = 25°C + 273.15 = 298.15 K
2.0L x 308.15 K = V₂ x 298.15 K
2.1 L = V₂
Final volume is 2.1L
Hence, The volume increases and the final volume is 2.1 L
Learn more about gas laws here ;
brainly.com/question/12669509
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