At first I thought it was c but then I checked And it’s either B or A? I’m thinking mostly A but good luck
Acid is a kind of chemical compound that when dissolved in water gives a solution with H+ ion activity more than purified water. A base is an aqueous substance that donates electrons, accept protons or release hydroxide (OH-) ions. An acid is a proton donor. While a base is a proton acceptor.
Answer:
24.1kJ
Explanation:
Heat capacity of water = 4200
Latent Heat of ice = 333550
Heat of Fusion = m × l = 333550 × (32/1000)kg = 10,672 = 10.672kJ
H = (m × c × change in temperature)
H = (32/1000)kg × 4200 × (85 -- 15)
H = (32/1000) × 4200 × 100
H = 13,440J = 13.44kJ
So amount of heat = 13.44kJ + 10.672kJ = 24.112kJ ~ 24.1kJ
Must reach it boiling point.
Answer:
1.05 x 10²²atoms
Explanation:
Given parameters:
Mass of Pb = 3.6g
Unknown:
Number of atoms in Pb = ?
Solution:
Some very essential constants;
1 mole of a substance contains 6.02 x 10²³atoms/mole
Molar mass of Pb = 207.2g/mol
First, we convert the mass to number of moles then to number of atoms.
Number of moles =
3.6g x x x 6.02 x 10²³ x = 1.05 x 10²²atoms