Answer:
5.2moles of NaCl
Explanation:
The equation for the reaction is:
2Na + Cl2 —> 2NaCl
From the equation,
2moles of Na produced 2moles of NaCl.
Therefore, 5.2moles of Na will also produce 5.2moles of NaCl
Basic Information
Name:<span> Lanthanum </span>
Symbol:<span> La </span>
Atomic Number:<span> 57 </span>
Atomic Mass:<span> 138.9055 amu </span>
Melting Point:<span> 920.0 °C (1193.15 K, 1688.0 °F) </span>
Boiling Point:<span> 3469.0 °C (3742.15 K, 6276.2 °F) </span>
Number of Protons/Electrons:<span> 57 </span>
Number of Neutrons:<span> 82 </span>
Classification: Rare Earth
Crystal Structure:<span> Hexagonal </span>
Density @ 293 K:<span> 6.7 g/cm</span>3
Color:<span> white
</span>
Answer is: there are 1.7·10²² Br⁻ ions.
m(AlBr₃) = 2.51 g; mass of aluminium bromide.
n(AlBr₃) = m(AlBr₃) ÷ M(AlBr₃).
n(AlBr₃) = 2.51 g ÷ 266.7 g g/mol.
n(AlBr₃) = 0.0094 mol; amount of substance.
In one mol of aluminium bromide there are three moles of bromine anions:
n(Br⁻) = 3 · 0.0094 mol.
n(Br⁻) = 0.028 mol.
N(Br⁻) = n(Br⁻) · Na(Avogadro constant).
N(Br⁻) = 0.028 mol · 6.022·10²³ 1/mol.
N(Br⁻) = 1.7·10²².
Answer: specie
Explanation:
A specie is the smallest group of organisms with similar characteristics and are capable of living with each other and breeding together freely. They give rise to young ones (offspring) that resembles the parents and can also breed with organisms of same species.
Examples of species include
- a group of lizards
- a group of human beings etc
