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NeX [460]
3 years ago
15

1.

Chemistry
2 answers:
yawa3891 [41]3 years ago
8 0

Answer:

1.

Chemical formula: CaBr2

Chemical name: calcium bromide (calcium has only one valence, so it isn't necceseraly to name it)

Cation: Ca^2+

Anion: Br^-

Chemical formula: NiO

Chemical name: Nickel(II) oxide

Cation: Ni^2+ (the name Nickel (ii) come from its valence)

Anion: O^2-

Chemical formula: Cd3N2 (notice that the addition of the valences of all elements is equal to zero because compounds are neutral, that is, 3*(2+) + 2*(3-) = 0)

Chemical name: Cadmium(II) nitride

2.

Chemical formula: SiI4

Chemical name: Silicon tetraiodide

Chemical formula: N2O (as it name states, 2 atoms of N and 1 atom of O)

Chemical name: dinitrogen monoxide

Chemical formula: P4O10 (it's actually composed by two molecules of P2O5)

Chemical name: Phosphorus pentoxide

Mazyrski [523]3 years ago
7 0

1)   {ca}^{2 + }  = cation \\ {br}^{2 - }  = anion

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3 years ago
The rate constant for this second‑order reaction is 0.190 M − 1 ⋅ s − 1 0.190 M−1⋅s−1 at 300 ∘ C. 300 ∘C. A ⟶ products A⟶product
Mamont248 [21]

Answer:

9.1 seconds

Explanation:

Given that for a second order reaction

1/[A]t = kt + 1/[A]o

Where [A]t= concentration at time = t= 0.340M

[A]o= initial concentration = 0.820M

k= rate constant for the reaction=0.190m-1s-1

t= time taken for the reaction (the unknown)

Hence;

(0.340)^-1 = 0.190×t + (0.820)^-1

t= (0.340)^-1 - (0.820)^-1/0.190

t= 9.1 seconds

Hence the time taken for the concentration to decrease from 0.840M to 0.340M is 9.1 seconds.

5 0
3 years ago
Use the following MO diagram for Be2, Be2+, and Be2-. Based on this diagram,
Marta_Voda [28]
Bond Order = [Σ (bonding e-) - Σ (antibonding e-)]/2 
<span>Be2 = 4e = σ1(2e) σ2*(2e) σ3(0) π1(0) π2*(0) σ4*(0) bo = 0 </span>
<span>[Be2]+ = 3e = σ1(2e) σ2*(1e) σ3(0) π1(0) π2*(0) σ4*(0) bo = 0.5 </span>
<span>[Be2]+ would be more likely to exist since it has a bond order of 0.5 whereas Be2 has zero bond order</span>
6 0
3 years ago
Read 2 more answers
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