Answer : The temperature at which water freeze will be, 
Explanation : Given,
Molal-freezing-point-depression constant 
for water = 
Mass of NaCl (solute) = 100 g
Mass of water (solvent) = 500 g = 0.500 kg
Molar mass of NaCl = 58.5 g/mole
Formula used :
where,
= change in freezing point
= freezing point of solution = ?
= freezing point of water = 
i = Van't Hoff factor = 2 (for NaCl electrolyte)
= freezing point constant for water =
m = molality
Now put all the given values in this formula, we get
Therefore, the temperature at which water freeze will be,
I believe they are chemical symbols. You can find them on the periodic table.
I didn’t learn about this but I do know erosion can make big cracks in your yard and the cracks can be so big that u can’t put your whole legs in there
Answer:
32.9%
Explanation:
<u>The mass of water </u>present in the original sample can be calculated by the substraction:
- m H₂O = sample mass before heating - sample mass after heating
- m H₂O = 8.24 g - 6.20 g = 2.04 g
The <u>percent by mass of water</u> can be calculated with the formula:
- Water Mass / Original Sample Mass * 100 %
* 100% = 32.9%
You can use a sieve, aka a sifter, to separate the rice grains from the flour
