is it a word problem beacuse i cant see the image. Im really good a chem but if you can write the question in the commets il answer it in the comments
Explanation:
Answer:
The molar mass of Ca(OH)2 is 74.092 g/mol
Explanation:
First your going to find the atomic mass of each element on the periodic table.
Ca(Calcium) = 40.078
O(Oxygen) = 15.999
H(Hydrogen) = 1.008
Then we can create the equation:
40.078 + (15.999 + 1.008) × 2
40.078 + (17.007) × 2
40.078 + 34.014
= 74.092 g/mol
Ahhhhhhhhhhhh Ask some one else
<u>Answer:</u> The given sample of water is not safe for drinking.
<u>Explanation:</u>
We are given:
Concentration of fluorine in water recommended = 4.00 ppm
ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.
To calculate the ppm of fluorine in water, we use the equation:
Both the masses are in grams.
We are given:
Mass of fluorine = (Conversion factor: 1 g = 1000 mg)
Mass of water = 5.00 g
Putting values in above equation, we get:
As, the calculated concentration is greater than the recommended concentration. So, the given sample of water is not safe for drinking.
Hence, the given sample of water is not safe for drinking.
Hi there!
Here's a picture to show you. Does this help?