17. not sure
18. not sure
19. movement of rock from one place to another
20. deposition
21. Urbanization
22. sedimentary
23. ease of traffic movement
24. absolute dating
25. fracture
26. increased farm land producing food for people
Answer:
You make aluminum phosphate which is an insoluble salt, so a precipitated is formed.
Explanation:
First reagent: Al(NO₃)₃
Second reagent: (NH₄)₃PO₄
This is the reaction:
Al(NO₃)₃ (aq) + (NH₄)₃PO₄ (aq) → AlPO₄ (s) ↓ + NH₄NO₃ (aq)
Al³⁺ (aq) + PO₄⁻³ (aq) ⇄ AlPO₄ (s) ↓ Kps
Salt from phosphate is formed.
4 electrons are shared in an O2 molecule.
P1V1=P2V2
(1.8)(1.5)=(1.0)V2
2.7=1.0 V2
2.7/1.0= 1.0/1.0V2
2.7=V2
The Group 3A metals have three valence electrons in their highest-energy orbitals (ns2p1). They have higher ionization energies than the Group 1A and 2A elements, and are ionized to form a 3+ charges. The Group 3A metals are silvery in appearance, and like all metals are good conductors of electricity.