Answer:
The surface tension of the water
Explanation:
The surface of the water curves down twords the edge of the coin.
Answer:
Explanation:
Hello.
In this case, the relationship between wavelength, speed of light and frequency is:
It means that solving for the frequency, we obtain:
Thus, for the given 720-nm wavelength and the speed of light, the frequency is:
Best regards.
You need to find the formula mass of NaCl first, which you find the amu of both sodium and chlorine on the periodic table and you add them both. Then you divide the 175.5g by the formula mass which I got 58 g to get 3.026 moles of NaCl. 4 sig figs because of the 175.5. I recommend doing it on your own to make sure you get the right answer. You divide the 175.5g of NaCl by the formula mass.
Answer:
29.9g acetone
37.8mL acetone
Explanation:
The reaction is:
acetone + 2 2.2-dimethylpropanal → 2,2,8,8-tetramethylnona-3,6-dien-5-one
<em>Acetone (0.791g/mL, 58.08g/mol); 2,2,8,8-tetramethylnona-3,6-dien-5-one (194.13g/mol)</em>
<em />
100g of product are:
100g×(1mol/194.13g) = <em>0.515mol 2,2,8,8-tetramethylnona-3,6-dien-5-one</em>
<em />
As 1 mole of product comes from 1 mole of acetone, moles of acetone are 0.515mol. In grams:
0.515mol acetone × (58.08g/mol) = <em>29.9g acetone</em>
Now, in mL are:
29.9g acetone × (1mL / 0.791g) = <em>37.8mL acetone</em>
