I would say B but yea hopefully it’s right I’m pretty sure it is though
Answer:
5.9x10²² atoms of Cu are in one naira coin
Explanation:
To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:
<em>Mass Cu:</em>
7.3g * 86% = 6.278g is the mass of Cu.
<em>Moles Cu:</em>
6.278g * (1mol / 63.546g) = 0.099moles Cu
<em>Atoms Cu:</em>
0.099moles Cu * (6.022x10²³atoms / 1mol) =
<h3>5.9x10²² atoms of Cu are in one naira coin</h3>
Since they can still be unstable...nuetral atoms have the same amount of protons to electrons but to be stable they need to fill up there outer shell by gaining or losing electrons
1. humans cant live without water
2. dolphins use up to 20% of their cerebral cortex
3. vikings were the first to inhabit dogs (wolves)
4. tom brady now has 5 superbowl rings
5. im black
6. whales are capable of ejaculating up to speeds as fast as a 12 gauge shotgun, under water
7. sharks have to keep swimming or they'll sink. this is why they swim mostly in shallow areas
8. my high school orchestra is the oldest public highschool orchestra in the whole united states, here in winfield kansas
9. I love my mother
10. she loves me as well
11. a roach can live up to 3 weeks without its head
12. trees are made out of wood
13. to find the line of symmetry on a parabola you use -b/2a
14. animals give birth
15. reptiles lay eggs
16. frogs are neither male nor female
17. Eminem is the rap god
18. my dad has diabetes
19. it is impossible to scratch a diamond with your fingernail
20. Bob's Bugers is the best show on adult swim <span />
Answer:
The molarity is 0.203 M
Explanation:
Using the formula C(oxi) x V(oxi) / [C(red) x V(red)] = N(oxi) / N(red)
Where oxi and red means reducing agent and oxidising agent respectively.
C = Concentration, V = Volume and N = number of moles.
C(oxi) = 0.5 M
V(oxi) = mL
C(red) = ?
V(red) = 30mL
Equation of reaction = 2K2S2O3 + KI3 = K2S4O6 + 3KI
so N(red) = 1 , N(oxi) = 2
from the equation above,
C(red) = 0.5 x 25 x 1 / (2 x 30)
= 0.203 M.
