Answer: The change in the volume of the balloon is 144.4L
Explanation: Please see the attachments below
Complete Question:
A chemist prepares a solution of iron chloride by measuring out 0.10 g of FeCl2 into a 50. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of anions in the chemist's solution.
Answer:
[Fe+] = 0.0156 M
[Cl-] = 0.0316 M
Explanation:
The molar mass of iron chloride is 126.75 g/mol, thus, the number of moles presented in 0.10 g of it is:
n = mass/molar mass
n = 0.10/126.75
n = 7.89x10⁻⁴ mol
In a solution, it will dissociate to form:
FeCl2 -> Fe+ + 2Cl-
So, the stoichiometry is 1:1:2, and the number of moles of the ions formed are:
nFe+ = 7.89x10⁻⁴ mol
nCl- = 2*7.89x10⁻⁴ = 1.58x10⁻³ mol
The molarity is the number of moles divided by the solution volume, in L (50.0 mL = 0.05 L):
[Fe+] = 7.89x10⁻⁴/0.05 = 0.0156 M
[Cl-] = 1.58x10⁻³/0.05 = 0.0316 M
Answer:
See Explanation
Explanation:
The Arrhenius acid-base theory defines an acid as a compound which when added into water increases the hydronium ion (H₃O⁺) concentration and the base as a compound which when added into water increases the hydroxide (OH⁻) ion concentration. As such, an acid-base reaction is limited to proton transfer to only OH⁻ ions forming water. Such would imply that all acid-base reactions produce water only in addition to a salt. This is not always the case as conjugate base anions for many substances can receive proton transfer.
Example: The reaction HOAc + NaCN => HCN + OAc- will occur in aqueous media because the proton (H⁺) on acetic acid (HOAc) will transfer to the cyanate ion forming hydrocyanic acid (HCN). Such occurs because the CN⁻ ion is a stronger conjugate base than the acetate ion (OAc⁻) and forms the more stable weak acid. Such is the basis of the Bronsted-Lowry Acid-Base system and states that an acid (proton donor) will transfer its ionizable hydrogen to a conjugate base (proton acceptor) if the transfer forms a weaker acid.
Answer:
1867.88g
Explanation:
The density of a substance can be calculated by dividing its mass by its volume. That is;
Density = mass/volume
In this question, the density of water is given as is 0.9870 g/mL, volume of water held by the container is 64 fluid ounces.
The unit, however, must be the same in order to work.
Since; 29.57 mL = 1 fluid ounce
64 fluid ounces will be 64 × 29.57 mL
= 1892.48 mL
Using the formula above, the mass (m)= density (p) × volume (v)
Mass = 1892.48mL × 0.9870 g/mL
Mass= 1867.8776
Mass = 1867.88g
Answer:
Your answer would be C. Keeps the same side always facing Earth.
Explanation:
This is because the Moon's rate of spin is so tidally locked that it's synchronized with its rate of revolution
Hope I helped! ☺
