The amount of grams of hydrogen that are in the water sample is;
3.985 g
<h3>Avogadro's number</h3>
We are given that;
Number of moles of oxygen in a sample of water = 12 × 10²³
- Now, the chemical formula of a molecule of water is H₂O. This means that for every 1 atom or molecule of oxygen, there must be 2 hydrogen atoms or molecules present.
Since Number of moles of oxygen in the sample is 12 × 10²³, then number of moles of hydrogen will be twice that = 2 × 12 × 10²³ = 24 × 10²³ moles
Now, molar mass of hydrogen is 1 g/mol and we know that;
Molar mass = Avogadro's number(6.023 × 10²³) moles
Thus;
6.023 × 10²³ moles = 1 g/mol
Thus; 24 × 10²³ moles of hydrogen = ( 24 × 10²³ × 1)/(6.023 × 10²³)
⇒ 3.985 g
Read more on Avogadro's number at; brainly.com/question/914267
Answer:
A.
4Fe + 3O2 2Fe2O3 .........................
Based on this passage, suspense was created for the reader because: D. the reader does not know why the old man is killed.
<h3>What is suspense?</h3>
Suspense refers to a literary device which can be used to describe the anxiety, uneasy feeling, and anticipation that a reader feels based on what is most likely to happen next in a literary work.
Based on this passage, we can infer and logically conclude that suspense was created for the reader based on the fact that he or she didn't know why the old man was killed.
Read more on suspense here: brainly.com/question/2689909
#SPJ1
Answer:
annual current dollar prices for undergraduate tuition, fees, room, and board were estimated to be $46,014 at private nonprofit institutions so I think its D :) but I'm not 100% sure
