Answer: pOH = 3.13
Ba(OH)2 is a very basic substance. The general formula for pOH is - log(OH)
Barium Hydroxide produces 2 moles of OH for every mole of Ba(OH)2 present in the solution.
0.00037 M = 3.7 * 10^-4 Ba(OH)2 will produce 2 *0.00037 M of OH-
OH- = 2* 0.00037 = 0.00074
pOH = - log(0.00074) = 3.13
Answer:
16.5 g of CO₂ are produced by 18.5 of methane and 24 g of O₂
Explanation:
This is a reaction of combustion:
CH₄ + 2O₂ → CO₂ + 2H₂O
1 mol of methane react to 2 moles of oxygen in order to produce 1 mol of carbon dioxide and 2 moles of water.
First of all, we determine the moles of each reactant:
18.5 g . 1mol/ 16g = 1.15 moles of methane
24 g . 1mol / 32g = 0.75 moles of oxygen
Now, we determine the limiting reactant:
1 mol of methane reacts to 2 moles of oyxgen
1.15 moles of methane may react to (1.15 . 2) /1 = 2.3 moles.
We only have 0.75 moles of O₂ and we need 2.3, that's why the oxygen is the limiting reagent, because we do not have enough oxygen for the reaction.
2 moles of O₂ produce 1 mol of CO₂
Then 0.75 moles may produce (0.75 . 1) /2 = 0.375 moles of CO₂
We convert the moles to mass → 0.375 mol . 44g /mol = 16.5 g
In 1869 he published a table of the elements organized by increasing atomic mass.
Mendeleev is called the "father of the modern periodic table
stated that if the atomic weight of an element caused it to be placed in the wrong group, then the weight must be wrong. (He corrected the atomic masses of Be, In, and U)
was so confident in his table that he used it to predict the physical properties of three elements that were yet unknown.
After the discovery of these unknown elements between 1874 and 1885, and the fact that Mendeleev's predictions for Sc, Ga, and Ge were amazingly close to the actual values, his table was generally accepted.
However, in spite of Mendeleev's great achievement, problems arose when new elements were discovered and more accurate atomic weights determined.
STOP DELETING MY COMMENTS PEOPLE PLEASE!!!!!!!!!
Explanation:
It should be decreasing, and the potential energy increasing, since Law of Conversation of Energy, right?
Also, if you think about what happens when it goes down, it loses potential and gains kinetic, so maybe the opposite should happen when it goes up.
The caffeine molecule is a polar molecule.
