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ki77a [65]
3 years ago
13

Helllppp Name the ions formed by the following elements (sodium - iodine)

Chemistry
1 answer:
Archy [21]3 years ago
5 0
Composed of sodium ions Na+( elemental sodium is a metal). And iodide ions l-(elemental iodine is a nonmetal)
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Could I have help on 4 and 5? Just the letter please I don't need an explaintion
PIT_PIT [208]
5. is b
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6 0
3 years ago
37.9 grams of an unknown substance undergoes a temperature increase of
jenyasd209 [6]

Answer:

1.023 J / g °C

Explanation:

m = 37.9 grams

ΔT = 25.0*C

H = 969 J

c = ?

The equation relating these equation is;

H = mcΔT

making c subject of formulae;

c = H / mΔT

c = 969 J / (37.9 g * 25.0*C)

Upon solving;

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4 0
3 years ago
Explain why a solution has a lower boiling point than the pure solvent
KonstantinChe [14]
Because the intention is to boil the solution, the purpose of the solvent is to dissolve so it has a higher boiling point so ensure it stays in liquid form and doesn't evaporate into a gas

also, a pure solvent is made of 1 substance so it has 1 boiling point and the solution must evaporate/boil first
7 0
3 years ago
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Oliga [24]
The weakest bond is a single covalent bond.
5 0
3 years ago
Which is the dependent variable in an experiment? 1.what I observe. 2. what I keep the same 3.What I change in the experiment. H
shtirl [24]

Answer:

1.what I observe.

Explanation:

The dependent variable in an experiment is what is being observed in the experimental procedure.

This variable is the one that is closely tied to the effects originating from changing the independent variables.

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