Each aluminium ion should have a charge of +2, because the sum of oxidation numbers must be zero.
The uncharged aluminium atom must lose two electrons to become an ion with +2 charge.
what has to happen to an uncharged aluminum atom so that it will bond with oxygen?
It has to lose electrons to become positively charged, so it can attract a negatively charged oxygen ion
There 2 ways to solve this
1- Directly :
80% of water in the fresh berries è 20% of water in the dried berries
36 Ibs of the fresh berries è X Ibs of the dried berries
X =
<span> = 9 Ibs</span>
<span>2- </span>If you do not understand the first method, the second one is more explicit:
First, we gonna calculate the weight of the berries without water (dehydrated):
<span>36 * 80% = 28.8 Ibs (of water in the berries)</span>
Then:
<span>36 – 28.8 = 7.2 Ibs (of completely dehydrated berries)</span>
Next, we gonna add 20% of water in the dehydrated berries:
X (total weight of dried berries) è 100%
7.2 Ibs of dehydrated berries è 80%
X = <span> </span>
= 9 Ibs
Answer:
The probabilities of different events can be represented and compared on a line marked from 0 to 1.
Explanation:
A probability scale is a simple way of showing probabilities. For example, if something has a zero chance of happening that means is it will never happen whereas the 0 represents that the event is impossible, where the 1 represents that it is certain. The scale can use whole numbers, fraction, decimals,, percents. etc.
Answer:
A)The daily rise and fall of Earth's waters on its coastlines
Explanation: