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Gemiola [76]
3 years ago
7

I really need help with this Im lost

Chemistry
1 answer:
Illusion [34]3 years ago
5 0
I believe it would weigh less if it’s blown up with helium because helium is lighter than air
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You preform an experiment using 4.0 m hcl. And 2.4 m naoh. The experiment calls for 5.0 ml of hcl and 10.0 ml of naoh. How many
Gnom [1K]

Answer:

0,020 moles of NaCl

Explanation:

For the reaction:

NaOH + HCl → NaCl + H₂O

The moles of NaOH are:

10,0 mL ≡ 0,0100L × 2,4mol/L = 0,024 moles of NaOH.

In the same way, moles of HCl are:

5,0 mL ≡ 0,0050L × 4,0mol/L = 0,020 moles of HCl.

The limiting reactant is the reactant that is completely used in the reaction.

In this case, as moles of HCl are less than moles of NaOH, limiting reactant is HCl.

That means that moles of NaCl that are produced are the same moles of HCl, <em>0,020 moles</em>

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I hope it helps!

5 0
4 years ago
All living organisms are made out of cells. Select three cell parts that all cells contain.
algol [13]

Answer:

cell membrane, ribosomes and dna..?

5 0
3 years ago
Which statement about a reaction is not correct?
Vikki [24]

Answer:

D

Explanation:

A reaction that is exothermic and causes a decrease in the entropy of the system cannot be a spontaneous reaction. This is not totally true because naturally For a spontaneous process, the entropy of the universe (system plus surroundings) must increase. This is the 2nd law of thermodynamics. The system entropy can decrease as long as the entropy of the surroundings increases enough to make the sum of the system and surroundings positive.

And we know that a spontaneous reaction is a reaction that occurs in a given set of conditions without intervention. Spontaneous reactions are accompanied by an increase in overall entropy or disorder. If the Gibbs Free Energy is negative, then the reaction is spontaneous, and if it is positive, then it is nonspontaneous.

5 0
3 years ago
Will the second method for determining volume (water displacement) work for ANY object or JUST an irregularly shaped one?
IrinaVladis [17]

Finding the volume of regular geometric objects uses standard formulas. The volume of a box equals length times width times height, for example. Not every object, however, fits a formula. Water displacement is best only used for irregular shaped objects.

3 0
3 years ago
One way to account for the mass "lost" in a reaction that involves a gas would be to________.
sergiy2304 [10]

Answer:

Place the experiments on a scale

Explanation:

If you place two of the same experiments on a scale, and cover one with a cup, the one with the cup will "lose" mass, while the other won't, due to the cup being a "containment field" I guess you could call it.

5 0
3 years ago
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