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andrew11 [14]
3 years ago
11

an unknown sample with a mass of 50.0 grams changes from an initial temperature of 22.5°C to a final temperature of 32.4°C. It i

s known that the sample absorbed 444 J and f heat l. Bases on this information, what substance in the table is most likely the identity of this sample?​

Chemistry
1 answer:
makvit [3.9K]3 years ago
7 0

Answer:

Aluminum

Explanation:

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Energy can come in many different forms such as mechanical energy, sound energy, electromagnetic energy, thermal energy, chemica
Trava [24]

Answer:

Explanation:

Energy can come in many different forms such as mechanical energy, sound energy, electromagnetic energy, thermal energy, chemical energy, and nuclear energy.

15 Energy is measured in units called __________

4 0
2 years ago
Write a balanced half-reaction for the product that forms at each electrode in the aqueous electrolysis of the following salts:(
Semmy [17]

The balanced half-reaction for the product that forms at anode is Fe⁺² + 2e⁻ → Fe(s) and 2H₂O + 2e⁻ → H₂ + 2OH⁻, the product that forms at cathode is 2I⁻  → I₂ + 2e- and 2H₂O  → O₂ + 4H⁺ + 4e⁻  

<h3>What is Balanced Chemical Equation ?</h3>

The equation during which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation is called balanced chemical equation.

Now write the equation for FeI₂

At cathode:

Fe⁺² + 2e⁻ → Fe(s) Eo = - 0.44 V

2H₂O + 2e⁻ → H₂ + 2OH⁻ Eo = - 0.827 V

It is easy to decrease Fe⁺² ions than the water, the product which is formed at cathode is Iron.

At anode:

2I⁻  → I₂ + 2e-    Eo = - 0.54 V

2H₂O  → O₂ + 4H⁺ + 4e⁻    Eo = -1.23 V

O₂ gas formed at anode.

Thus from the above conclusion we can say that The balanced half-reaction for the product at anode is Fe⁺² + 2e⁻ → Fe(s) and 2H₂O + 2e⁻ → H₂ + 2OH⁻, the product that forms at cathode is 2I⁻  → I₂ + 2e- and 2H₂O  → O₂ + 4H⁺ + 4e⁻.

Learn more about the Balanced chemical equation here: brainly.com/question/26694427

#SPJ4

6 0
2 years ago
The area of a rectangle is 50 m2<br> If the height is 4 m, what is the<br> base?
Oliga [24]

Area = height × base

50 = 4 × base

Thus

base = 50/4

Base = 12.5 m

6 0
3 years ago
Read 2 more answers
BRAINLIEST FOR FREE AND FREE 20 POINTS FOR HELPING ME!!!
natita [175]

Answer :electrostatic repulsion.

EXPLANATION

Valence shell electron pair repulsion theory, or VSEPR theory, is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms

8 0
3 years ago
A block of aluminum occupies a volume of 15ml and weighs 40.5 g, what it its density?
san4es73 [151]
<h2>Answer:3gmL^{-1}</h2>

Explanation:

Let v be the volume of the given material.

Let m be the mass of the material.

Let d be the density of the material.

Density of a material is defined as the ratio of its mass to its volume.

d=\frac{m}{v}

Given,

m=45g\\v=15ml

So,d=\frac{45}{15}=3gmL^{-1}

5 0
3 years ago
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