Answer:
the sodium nitrate in this investigation is
a) the solute
b) undergoing chemical change
<h3>
Explanation:</h3>
generally, solute is the substance which is added in solvent.
The substance which is taken in relatively more volume is the solvent.
so, here sodium nitrate (NaNO₃) is the solute which is dissolved in water (H₂O) , which is solvent.
The reaction between them is :
NaNO₃ + H₂O ⇒ Na⁺ (aq) + NO₃⁻ (aq) ; (aq) denotes aqueous;
so, here sodium nitrate undergoes chemical change into aqueous sodium ions(Na⁺) and aqueous nitrate ions(NO₃⁻).
1)4
2)3
3)0
4)12
4(NH4)3 + 3Pb(NO3)4= Pb3(PO4)4 +12NH4NO3
Answer:
ice caps
Explanation:
because has no surface of water
Answer :
(a) The number of grams in 1 amu is,
(b) The number of atoms in a pound-mole of a substance is,
Explanation :
<u>Part (a) : </u>
As, we know that:
1 gram = amu
Now we have to determine the number of grams in 1 amu.
As, amu = 1 gram
So, 1 amu =
Thus, the number of grams in 1 amu is,
<u>Part (b) :</u>
As we know that the value of gram-mole is same in pound-mole.
Now we have to determine the number of atoms in a pound-mole of a substance.
Number of atoms = Pound-mole × Avogadro's number
As, 1 Pound-mole = 453.6 gram-mol
Avogadro's number =
Number of atoms = 1 pound-mol ×
Number of atoms = 453.6 gram-mol ×
Number of atoms =
Thus, the number of atoms in a pound-mole of a substance is,