12: B, since it said the temperature is below 3,500
Answer:
20 ml 13% solution should the professor use
Explanation:
Let
the volume of the 13% solution should the professor use = a
So, according to question
13% x a + 18% x (50-a) = 50 x 16%
⇒ 0.13 a + 0.18 x 50 - 0.18 a = 50 x 0.16
⇒ - 0.05 a = 8 - 9
⇒
So, <u>20 milliliters of the 13% solution</u> should be the professor used.
& (50 - 20) = 30 ml of the 18 % solution would be use.
Answer:
Sodium citrate is a compound with a total of 21 atoms
Answer:
The final pressure of the carbon dioxide gas will 11.84 atm.
Explanation:
Moles of carbonic acid =
According to reaction, 1 mol of carbonic acid gives 1 mole of carbon dioxide gas.
Then 0.9677 moles of carbonic acid will give :
of carbon dioxide
Moles of carbon dioxide gas = n = 0.09677 mol
Volume of soda bottle =
Pressure of the carbon dioxide gas = P
Temperature of the carbon dioxide gas = T = 298 K
(ideal gas law)
The final pressure of the carbon dioxide gas will 11.84 atm.