Answer:
Therefore when 1.26 moles of H₂O is reacted 0.63 mole of O₂ are produced.
Explanation:
The required reaction is
H₂O → O₂+H₂
The reaction is not balance reaction. First we have to balance the reaction.
2H₂O → O₂+2H₂
From the above reaction we conclude that,
2 mole of H₂O produces 1 mole of O₂ and 2 moles of H₂.
∴When 2 mole of H₂O reacts then it produces 1 mole of O₂
1 mole of H₂O reacts then it produces mole of O₂.
1.26 mole of H₂O reacts then it produces mole of O₂.
=0.63 mole
Therefore when 1.26 moles of H₂O is reacted 0.63 mole of O₂ are produced.
The chemical bond is determined by its overall shape of
the molecule, the angles made by the lines joining the nuclei of the atoms in
the molecule. The bond angles together with the bond lengths accurately define
the shape and size of the molecule.
Answer:
Explanation:
average speed=distance travelled/time taken
distance=speed*time
15*10=150 m
1200 m/min=20 m/s
0.17 minute=10.2 seconds
20*10.2=204 m
2500 cm/s=25 m/s
5000 milliseconds=5 seconds
25*5=125 m
125+150+204=479 m
10.2+5+10=25.2
479/25.2=<u>19.0 </u>
C. flammable
let me know if you want to know why
Answer:
Explanation:
We want to convert from moles to grams, so we must use the molar mass.
<h3>1. Molar Mass</h3>
The molar mass is the mass of 1 mole of a substance. It is the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units (amu).
We are given the compound PI₃ or phosphorus triiodide. Look up the molar masses of the individual elements.
- Phosphorus (P): 30.973762 g/mol
- Iodine (I): 126.9045 g/mol
Note that there is a subscript of 3 after the I in the formula. This means there are 3 moles of iodine in 1 mole of the compound PI₃. We should multiply iodine's molar mass by 3, then add phosphorus's molar mass.
- I₃: 126.9045 * 3=380.7135 g/mol
- PI₃: 30.973762 + 380.7135 = 411.687262 g/mol
<h3>2. Convert Moles to Grams</h3>
Use the molar mass as a ratio.
We want to convert 3.14 moles to grams, so we multiply by that value.
The units of moles of PI₃ cancel.
<h3>3. Round</h3>
The original measurement of moles has 3 significant figures, so our answer must have the same. For the number we calculated, that is the tens place.
The 2 in the ones place tells us to leave the 9.
3.14 moles of phosphorous triiodide is approximately equal to <u>1290 grams of phosphorus triodide.</u>