Answer:
Firstly, the name of the element is Rhodium, symbol Rh, Atomic number 45, Mass number 102.9 (103)
Answer:
The answer to your question is 3.65 g of HCl
Explanation:
Data
volume = 1 l
[HCl] = 0.1 M
moles of HCl = ?
Process
1.- Calculate the number of moles
Molarity = moles / volume
-Solve for moles
moles = Molarity x volume
-Substitution
moles = 0.1 x 1
-Result
moles = 0.1 moles
2.- Convert moles to grams
-Calculate the molar mass of HCl
HCl = 1 + 35.5 = 36.5 g
-Convert
36.5 g of HCl ------------------- 1 mol
x ------------------- 0.1 moles
x = (0.1 x 36.5) / 1
-Result
x = 3.65 g
-How to prepare the solution
Once I have weighed the mass of HCl, I place it in a volumetric flask and pour enough water till 1 l.
Answer:
.0027 M
Explanation:
We must calculate the threshold concentration of PO3−4 using Ksp and the given concentration of Ca2+:
Ca3(PO4)2(s)⇌3Ca2+(aq)+2PO3−4(aq)
Ksp=8.6×10−19=[Ca2+]3[PO3−4]2=(4.9×10−5M)3[PO3−4]2
[PO3−4]=0.0027 M
Nitrogen is often used for the storage of semen samples for artificial insemination of cattle. Nitrogen is used to maintain a dry inert atmosphere over chemicals during storage, reaction or processing. Used in brewing, soft drinks and wine-making industries to exclude air from the product and de-aerate water.