Answer:
(molecular) 3 CaCl₂(aq) + 2 (NH₄)₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄Cl(aq)
(ionic) 3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 NH₄⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄⁺(aq) + 6 Cl⁻(aq)
(net ionic) 3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)
Explanation:
The molecular equation includes al the species in the molecular form.
3 CaCl₂(aq) + 2 (NH₄)₃PO₄(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄Cl(aq)
The ionic equation includes all the ions (species that dissociate in water) and the species that do not dissociate in water.
3 Ca²⁺(aq) + 6 Cl⁻(aq) + 6 NH₄⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s) + 6 NH₄⁺(aq) + 6 Cl⁻(aq)
The net ionic equation includes only the ions that participate in the reaction and the species that do not dissociate in water. In does not include <em>spectator ions</em>.
3 Ca²⁺(aq) + 2 PO₄³⁻(aq) ⇄ Ca₃(PO₄)₂(s)
7=cells
9= The Central Nervous system
10= not sure
Answer:
The mass of nitrogen molecule 
= 45.65 g
Explanation:
The equation for the redox reaction can be represented as follows:
We know that:
numbers of moles = mass/molar mass
For 
:
number of moles = 50g/92 g/mol
number of moles = 0.5435 mol
For 
:
number of moles = 45 g/ 32 g/mol
number of moles = 1.40625 mol
From the above equation;
number of moles of needed = 1/2 moles of = 1/2 × 1.40625 mol
= 0.703125 mol
The amount of present = 0.5435 moles which is less than the needed. As such is the limiting reagent
The number of moles of nitrogen molecule produced = 3 × ()
= 3 × 0.5435
= 1.6305 mol
The mass of nitrogen molecule = number of moles of × molar mass of
The mass of nitrogen molecule = 1.6305 mol × 28 g/mol
The mass of nitrogen molecule = 45.654 g
The mass of nitrogen molecule = 45.65 g
