Answer:
8 molecules of oxygen gas are required.
Explanation:
Combustion reaction is the type of chemical reaction in which a hydrocarbon reacts with oxygen gas to give to carbon dioxide and water.
According to reaction ,1 mole of pentane reacts with 8 molecules of oxygen gas to give 5 moles of carbon dioxide and 6 moles of water.
So, to burn 1 mole of pentane we will need 8 molecules of oxygen gas.
Answer:
A
Explanation:
Let's illustrate this; see the attachment.
We see that Mrs. Jacobson is pushing to the right with a force of 100 N and there is another opposite force pushing with a force of 15 N. Since these are in opposite directions, we can say that the force opposite to Mrs. Jacobson is pushing the fridge -15 N to the right (instead of 15 N to the left).
The net force would then be:
100 N + (-15 N) = 85 N to the right
The answer is A.
Answer:
Equilibrium constant of the given reaction is
Explanation:
....
....
The given reaction can be written as summation of the following reaction-
......................................................................................
Equilibrium constant of this reaction is given as-
In 1 mole of , there are 3 moles of ions, 1 mole of Ca^{2+} and 2 mole of
.
Molar mass of is 110.98 g/mol. Calculating number of moles from given mass as follows:
Thus, number of moles of ions will be .
Since, 1 mole of any substance has units of that substance where
is Avogadro's number.
Thus, 9.38 mol of ions will have number of ions.
Therefore, total number of ions in 347 g of is
.