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8090 [49]
3 years ago
8

Which of the following statements is true? a. Ag(s) reacts spontaneously with 1 M H+(aq). b. Ag(s) reacts spontaneously with Ni2

+. c. Ag(s) reacts spontaneously with 1 M NO3– in 1 M H+(aq). d. Ni2+ reacts spontaneously with 1 M H+(aq) to form H2. e. Ni2+ reacts spontaneously with H2(g).
Chemistry
1 answer:
sammy [17]3 years ago
5 0

Answer:

Correct answer is a. Ag(s) reacts spontaneously with 1M H+(aq).

Explanation:

A charasteristic of metals is that they lose easily electrons, cations tends to gain electrons to react and anions tends to lose or share electrons to react.

If you want to make a chemical reaction you must to mix a reagent that tends to lose electrons with other that tends to gain them.

In the statement (a) we have a metal that loses electrons and a cation that can obtain them, so is the right answer.

note that the other optios have :

b) Metal with metal cation, not react beacause left a medium of reaction.

c) Both loses electrons

d) Both tends to gain electrons.

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3 years ago
ASAP!
Andrei [34K]

Answer:

8.3334%

Explanation:

You have two masses. To find the percent of sodium chloride in water by mass, you divide the mass of NaCl by water. First, make both units the same. Easiest is to convert kg into g. 1.5kg = 1500g

125g NaCl/1500g H2O = 0.0833333333 ==> 8.3334%

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3 years ago
Why do all the elements in Group 16 share similar properties?
geniusboy [140]
D. They all have the same number of valence electrons.
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3 years ago
O tetraclorometano é um solvente muito utilizado na indústria de transformaç?o de produtos orgânicos ele é produzido pela reaç?o
Vlada [557]

Answer:

ΔHr = -103,4 kcal/mol

Explanation:

<u>Using:</u>

<u>AH° (kcal/mol) </u>

<u>Metano (CH) </u>

<u>-17,9 </u>

<u>Cloro (CI) </u>

<u>tetraclorometano (CCI) </u>

<u>- 33,3 </u>

<u>Acido cloridrico (HCI) </u>

<u>-22</u>

It is possible to obtain the ΔH of a reaction from ΔH's of formation for each compound, thus:

ΔHr = (ΔH products - ΔH reactants)

For the reaction:

CH₄(g) + Cl₂(g) → CCl₄(g) + HCl(g)

The balanced reaction is:

CH₄(g) + 4Cl₂(g) → CCl₄(g) + 4HCl(g)

The ΔH's of formation for these compounds are:

ΔH CH₄(g): -17,9 kcal/mol

ΔH Cl₂(g): 0 kcal/mol

ΔH CCl₄(g): -33,3 kcal/mol

ΔH HCl(g): -22 kcal/mol

The ΔHr is:

-33,3 kcal/mol × 1 mol + -22 kcal/mol× 4 mol - (-17,9 kcal/mol × 1 mol + 0kcal/mol × 4mol)

<em>ΔHr = -103,4 kcal/mol</em>

<em></em>

I hope it helps!

3 0
3 years ago
How much energy is transferred from a plant to an herbivore that eats it? A. 5% B. 10% C. 20% D. 90%
Tema [17]

Answer:

B. 10%

Explanation:

6 0
3 years ago
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