Which family of the periodic table forms ions with a -1 charge
1 answer:
You might be interested in
Answer:
0.51g
Explanation:
Given parameters:
Volume of nitrogen gas = 744mL
Unknown:
Mass of sodium metal produced = ?
Solution:
Let us assume that the gas, nitrogen was collected at STP which is the standard temperature and pressure, we can easily find its number of moles.
Number of moles =
since the gas volume given is 744mL = 0.744mL
Therefore input the variables;
Number of moles = = 0.03moles
Now that we know the number of moles of the gas, let us revisit the reaction equation:
2NaN₃ → 2Na + 3N₂
It good to ensure that the reaction is balanced;
3 mole of nitrogen gas is produced with 2 moles of Na
0.03 mole of nitrogen gas will be produce with = 0.02mole
So;
Using;
mass = number of moles x molar mass
let us solve for the mass of Na;
molar mass of Na = 23g/mol
mass = 0.02 x 23 = 0.51g
Answer:
Explanation:
El porcentaje masa a masa de la solución se obtiene al dividir la masa del cloruro de sodio por la masa del agua (The mass-mass percentage of solution is obtained by dividing the mass of sodium chloride by the mass of water):
Answer:
0.295 L
Explanation:
It seems your question lacks the final concentration value. But an internet search tells me this might be the complete question:
" A chemist must dilute 47.2 mL of 150. mM aqueous sodium nitrate solution until the concentration falls to 24.0 mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits. "
Keep in mind that if your value is different, the answer will be different as well. However the methodology will remain the same.
To solve this problem we can<u> use the formula</u> C₁V₁=C₂V₂
Where the subscript 1 refers to the concentrated solution and the subscript 2 to the diluted one.
- 47.2 mL * 150 mM = 24.0 mM * V₂
- V₂ = 295 mL
And <u>converting into L </u>becomes:
- 295 mL *
= 0.295 L