Answer:
sample C have the highest density
Explanation:
Data Given:
mass of sample A = 224.96 g
Convert g to kg
1 g = 0.001 Kg
224.96 g = 224.96 x 0.001 = 0.225 kg
mass of sample B = 0.55632 Ibs
Convert lbs to kg
2.21 lb = 1 kg
0.55632 Ibs = 0.55632 / 2 = 0.278 kg
mass of sample C = 0.30648 kg
Solution:
To calculate density of every sample we have the following formula
d = m/v . . . . . . . . . . (1)
It is clear from the formula that density have direct relation with mass and inverse relation with volume, that is density increase with increasing in mass.
As we have same volume of wood sample, so suppose that each sample have volume of 2 cm³
So now we find density for each sample
As for sample A
- mass of sample A = 0.225 kg
Put values in formula 1
d = 0.225 kg / 2 cm³
d = 0.128 kg/cm³
As for sample B
- mass of sample A = 0.278 kg
Put values in formula 1
d = 0.278 kg / 2 cm³
d = 0.139 kg/cm³
As for sample C
- mass of sample C = 0.30648 kg
Put values in formula 1
d = 0.30648 kg / 2 cm³
d = 0.153 kg/cm³
So it shows that sample C have the highest density that is 0.153 kg/cm³ . As it have the highest mass too among all samples.
The maximum solubility of Ag₂CO₃ = = 1 x 10⁻⁵
<h3>Further explanation</h3>
Given
0.02 M Na₂CO₃
Ksp of Ag₂CO₃ is 8 x 10⁻¹²
Required
The solubility of Ag₂CO₃
Solution
Ag₂CO₃ ⇒ 2Ag⁺ + CO₃²⁻
s 2s s
s = solubility
Ksp Ag₂CO₃ = [Ag⁺]² [CO₃²⁻]
Ksp Ag₂CO₃ = (2s)².s
Ksp Ag₂CO₃ = 4s³
In 0.02 M Na₂CO₃ ⇒ 2Na⁺ + CO₃²⁻⇒ [ CO₃²⁻]=0.02, so Ksp Ag₂CO₃ :
8 x 10⁻¹² = [2s]² [0.02]
8 x 10⁻¹² = 4s² [0.02]
4s² = 8 x 10⁻¹² / 2 × 10⁻²
4s² = 4 x 10⁻¹⁰
s² = 1 x 10⁻¹⁰
s = √1 x 10⁻¹⁰
s = 1 x 10⁻⁵
Answer:
13.687 grams of salt should be added
The total grams of 8.6% of brine solution produced is 852.687g
Explanation:
Solution mass= 962g
Salt= 6.2%
Water = 93.8%
962 gram of water is made up of:
902.356g ( due to vaporization which reduces mass)
= 902.356 - 123
= 779. 356g of water
59.644g of salt.
If we add x gram of salt for making brine solution up to 8.6%
=(59. 644g + x)g.of salt
% salt = Mass of Salt / Total mass of solution
= 0.086= 59.644 + x / 779.356 + 59.644 + x
= 59.644 + x / 839 + x
x= 13.687 g of salt
Grams of 8.6% brine solution will be:
Gram of water + total gram of salt added to form 8.6% brine solution.
= 779.356g +59.644g + 13.687g
= 852.687g
The total grams of 8.6% of brine solution produced is 852.687g
Light would be more consistent being made up of particles rather than waves.
Answer:
Precise but not accurate.
Explanation:
We can tell the performance of the balance is precise, because the repeated measurements give values close to one another.
However, the performance of the balance is not accurate, as the mean value of the repeated measurements (195.587) is not close to the value considered as true (in this case the standard calibration mass with a certified value of 200.002 g).
