Answer:
The solution is 4.93 molal
Explanation:
We assume that solution is aqueous.
We need to apply the colligative property of elevation of boiling point:
ΔT = Kb . m . i
ΔT = Boiling T° of solution - Boiling T° of pure solvent
110.1°C - 100°C = 10.1°C
Kb = 0.512 °C/m
m = molality → unknown
i = Van't Hoff factor (numbers of ions dissolved)
We assume 100 % dissociation: CoCl₃ → Co³⁺ + 3Cl⁻ i = 4
We have 1 mol of Co³⁺ + 3 moles of chlorides
We replace data → 10.1°C = 0.512°C/m . m . 4
10.1°C / (0.512 m/°C . 4) = m → 4.93
Answer:The outer core of the Earth contains a lot of iron in a molten state. As the Earth spins this molten iron moves and creates the Earth's magnetic field. The Earth behaves as if there is a huge bar magnet at its centre. The shape of the field around the Earth is very similar to the field around a bar magnet
Explanation:
<h2>Answer:</h2>
<u>Biomagnifiaction is the accumulation of the toxic chemicals in organisms up to the dangerous level and successively contributed to the food chain.</u>
<h3>Explanation:</h3>
Bio magnification which is also known as bio accumulation or bio amplification.
In bio magnification a compound which is chemical in nature is accumulated due to the eating of food that contains elements.
As in case pf plants, fertilizers and chemicals are sprayed on the plants which are then consumed by the other organisms and become the part off that organism in the elevated form. That organism is then consumed by the other organisms.
And then in this process, the chemical will be transferred to the highest trophic level of food web.
Answer:
%C = 60.9%; %H = 15.4%; %N = 23.7%
Explanation:
Step 1: Given data
- Mass of the sample (m): 12.04 g
- Mass of Carbon (mC): 7.34 g
- Mass of Hydrogen (mH): 1.85 g
- Mass of Nitrogen (mN): 2.85 g
Step 2: Calculate the percent composition of this compound
To calculate the percent by mass of any element (E), we will use the following expression.
%E = mE/m × 100%
%C = 7.34 g/12.04 g × 100% = 60.9%
%H = 1.85 g/12.04 g × 100% = 15.4%
%N = 2.85 g/12.04 g × 100% = 23.7%
Answer:
<h2>Density = 1.59 g/mL</h2>
Explanation:
The density of carbon tetrachloride can be found by using the formula
<h3>
</h3>
From the question
Volume = 225 mL
To find the mass of carbon tetrachloride in the flask subtract the mass of the flask from the total mass of the flask and carbon tetrachloride
That's
mass of carbon tetrachloride =
703.55 - 345.8
= 357.75 g
Substitute the values into the above formula and solve for the density
That's
<h3>
</h3>
We have the final answer as.
Density = 1.59 g/mL
Hope this helps you