This problem is providing both the mole fraction and mass of magnesium chloride in an aqueous solution. Thus, the total moles of the solution are required and turned out to be 4.62 moles.
<h3>Mole fraction</h3>
In chemistry, units of concentration are used to account for the relative amounts of solute and solvent in solid, liquid or even gaseous solutions.
Thus, several units are widely employed, yet this problem is about mole fraction, which relates the moles of the solute and the total moles of the solution as follows:
Hence, given the mass of the solute, calcium chloride, we can calculate its moles as follows:
Thereafter, we solve for the total moles of the solution and subsequently plug in the knowns:
Learn more about mole fraction: brainly.com/question/2060778
Answer:
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Answer:
When you build up a soapy lather, the molecules help lift the dirt, oil and germs from your skin
Explanation:
Soap molecules have one end that bonds with water and the other end that bonds with oils and fats .
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Answer:
The mass of ice required to melt to lower the temperature of 353 mL of water from 26 ⁰C to 6 ⁰C is 85.4197 kg
Explanation:
Heat gain by ice = Heat lost by water
Thus,
Heat of fusion + 
Where, negative sign signifies heat loss
Or,
Heat of fusion + 
Heat of fusion = 334 J/g
Heat of fusion of ice with mass x = 334x J/g
For ice:
Mass = x g
Initial temperature = 0 °C
Final temperature = 6 °C
Specific heat of ice = 1.996 J/g°C
For water:
Volume = 353 mL
Density of water = 1.0 g/mL
So, mass of water = 353 g
Initial temperature = 26 °C
Final temperature = 6 °C
Specific heat of water = 4.186 J/g°C
So,
345.976x = 29553.16
x = 85.4197 kg
Thus,
<u>The mass of ice required to melt to lower the temperature of 353 mL of water from 26 ⁰C to 6 ⁰C is 85.4197 kg</u>
Assuming that the force of friction does not equal to the force at which you are pulling at, hence Fnet is not zero, to solve for acceleration need to use the following equation:
Fnet = ma
a = Fnet/m
a = 50 N/10 kg
a = 5 N/kg or a = 5 m/s^2.
