I took the test and got this question right! Here is the work.
molality = moles solute / kg solvent
<span>moles AgClO4 = 75.2 g / 207.389 g/mol </span>
<span>= 0.3626 mol </span>
<span>molality = 0.6326 mol / 0.885 kg </span>
<span>= 0.410 m
The asnwer is 0.41.</span>
Answer:
0.404 mol / L
Explanation:
The <em>total moles of barium chloride</em> can be calculated from <em>the volume and concentration of the stock solution</em>:
1.39 mol/L * 0.180 L = 0.2502 moles barium chloride
Now we <u>calculate the concentration of the working solution, by dividing the total moles by the final volume</u>:
0.2502 mol / 0.620 L = 0.404 mol / L
The answer for the following answer is mentioned below.
- Therefore the mass of calcium nitrate (
Explanation:
To find the mass of calcium nitrate ( ) is :
No of calcium are 1
No of nitrogen are 2
No of oxygen are 6
= 
So therefore;
No of nitrogen are 2
No of oxygen are 6
Mass of ( ) :
molecular mass of calcium =40
molecular mass of nitrogen = 14
molecular mass of oxygen = 16
= (14×2) + (16×6)
= 28 + 96
= 124
= 40 + 124
<u><em></em></u><u><em> = 164 grams</em></u>
Therefore the mass of calcium nitrate ( ) is 164 grams
<u>Answer:</u>
<u>read below</u>
<u>Explanation:</u>
<u>When the zebra eats grass, it gets energy from the sun that has been stored in the grass. Similarly, the lion obtains energy stored in the zebra. The zebra and lion both obtain the sun's energy indirectly from the energy that the grass obtained through photosynthesis. </u>
