Srry I can’t help u because I can’t understand ur English I don’t speak French Srry I’m learning French in school
Answer: A river flowing at a certain speed
Explanation: as water has certain velocity and mass.
Protons is what indicates the element
Different numbers of neutrons/ electrons would result in a charged elements (isotope)
Answer:
<u><em>95 people can breath with five such trees supplying oxygen.</em></u>
Explanation:
Given data:
a man take in oxygen in a day : 22
(1
= 1000L)
Tree length: 33 m
Tree diameter : 0.55 m
tree produce oxygen in a year : 84,000 L
Tree oxygen in the air : 20%
1
= 1000 L
To find:
number of people can breath with 5 such trees: ?
Calculation:
Calculate the oxygen produced by 5 trees:
= 5 x 84,000
= 420.000 L
= 420
Calculate the air
= 420 x 100% / 20%
= 2100 m^3
Calculate the number of people:
= 2100 m^3 / 22 m^3
= 95.5
= 95 people
Answer: The number of Ni2+ ions is 1.46 × 10^18 ions
The number of Ag+ ions is 2.92 × 10^18 ions
Explanation: Please see the attachments below