Answer:
B 1,3
Explanation:
Count the atoms on each side of the arrow, they have to be equal
After arrow
2x C
6x O
4x H
Before the arrow
2x C - correct, as it is the only compound with C then there must only be 1 mole of it.
This is also the correct amount of H
We need 6x O total so 6/2 = 3
So there are 3 moles of O
Answer:
the fraction of collisions with energy greater than Eact
Explanation:
The activation energy of a reaction stands as a sort of energy barrier between reactants and products. It is only reactants that possesses energy greater than the activation energy that can be converted from reactants to products.
When the temperature of the system is increased, more particles acquire energy greater than the activation energy. Hence, the fraction of collisions with energy greater than the activation energy increases so the rate of reaction increases likewise.
It's common for nails to be made of iron, which is a metal that rusts when it comes into contact with air. Exposure to the elements for a long time caused oxygen-iron reactions when there was moisture around. This caused a chemical reaction that made rust, which is made of iron oxide.
Here, the oxygen that mixed with the iron to make rust adds weight to the thing.
Answer:
326.9mL
Explanation:
...Of a 1.3M aluminium chloride solution that contains 425mmol of aluminium chloride...
The prefix milli, m, means denotes factor of one thousandth (1x10⁻³), that means 425mmol are:
425mmol * (1x10⁻³mol / 1mmol) = 0.425moles of AlCl₃.
In the same way, Molarity, m, is defined as moles of solute (aluminium chloride) per liter. The 1.3M contains 1.3 moles per liter. There are 0.425moles in:
0.425moles * (1L / 1.3moles) = 0.3269L.
In milliliters:
0.3269L * (1000mL / 1L) =
<h3>326.9mL</h3>