Ni solution could be used to remove lead from lead (II) nitrate.
Explanation:
The removal of lead from lead nitrate will take place by displacement reaction.
In displacement reaction less reactive element is displaced by more reactive element form it compound.
The reactivity is decided by the placement of metal in the activity series.
A metal which is at higher position in the activity series will be able to displace the metal or element having lower position.
From the options given we will check their position in the activity series in comparison to Pb
Cu is lower in series than Pb hence cannot displace.
Hg is placed lower in the series than Pb hence cannot displace Pb.
Ag is placed lower than Pb in the series hence cannot displace Pb.
Ni is placed above the Pb in activity series hence can displace lead.
Answer: P = 7.1 atm
Explanation: For this problem we will use Combined Gas Law to solve for the new pressure. But never forget to convert the unit of temperature to Kelvin.
P1V1 /T1 = P2V2/ T2, Derive for P2.
P2 = P1V1T2 / T1V2
= 1.00 atm ( 3.00 L ) ( 323 K) / 273 K ( 0.50 L )
= 7.1 atm
Cancel out the units of L and K and the unit remains is in atm.
Answer:
the answer is 5.35 i hope you get it right
The correct answer is (a)
It is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion.
The explanation:
- the bond between oxygen and phosphorus is covalently.
when A covalent bond is a bond in which electrons are shared. \nd the ionic bond, electrons are completely transferred. In this case phosphate ion (PO4)-3 is covalent.
- that's means that the choice C and D don't be the correct answer.
-Additionally, since the charge is on the oxygen atoms due to the bonding with phosphorus, so we can say that the charge is on the entire ion and not just on the phosphorus atom so,the answer B also not the correct answer.
and the correct one is (A)
Answer:
0.156 moles of Fe₂O₃
Explanation:
To determine the moles, we must divide mass (g) to the molar mass of the compound.
Fe₂O₃ → 159.7 g/mol (molar mass)
We need the mass of compound in g, so let's do the conversion:
2500 cg . 1g / 100cg = 25 g
Moles = mass / molar mass → 25 g / 159.7 g/mol = 0.156 moles of Fe₂O₃