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4 years ago

1.133 g of silver nitrate was heated in an open tube. The silver residue weighed 0.720 g. During the reaction 0.307 g of nitroge

n dioxide was also produced. The rest of the mass loss was due to oxygen. Use the data to write the equation for the reaction.

Chemistry

1 answer:

jekas [21]4 years ago

3 0

$AgNO_3--^T-->Ag_2O+NO_2\uparrow+O_2\uparrow\\\\
N^{+V}+1e\rightarrow N^{+IV}|4\\
2O^{-II}-4e\rightarrow O_2^0|1\\\\
4AgNO_3--^T-->2Ag_2O+4NO_2\uparrow + O_2\uparrow$

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iris [78.8K]

Answer:

a, d and e. are true.

Explanation:

The reaction that occurs is:

Na2CO3(aq) + CaCl2(aq) → CaCO3(s) + 2NaCl

In ideal conditions, the percent yield of the reaction must be 100%. All explanations about why the student could not collect all precipitate are right:

a. The combined reactants were not stirred before filtering the precipitate. Not stirring could not promote all the reaction. TRUE.

b. The student did not completely dry the precipitate before weighing it. If the student don't dry the precipitate, the mass of precipitate must be higher producing a percent yield > 100%. FALSE.

c. The precipitate was not washed prior to drying. Produce more mass. FALSE.

d. A rubber policeman was not used to scrape precipitate from the beaker. If the student doesn't collect all the precipitate the percent yield could be < 100%.. TRUE.

e. The filter paper was not wetted with water prior to filtering the precipitate. TRUE. If you don't wet the filter paper you can lose a part of precipitate from the walls of this one.

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3 years ago

The measure of how much salt will dissolve into 100 g of water is______

katen-ka-za [31]

Its solubility because you are looking at how much will desolve

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4 years ago

The overall flow of energy through an ecosystem is from

Alik [6]

Answer:

So, I don't know if this is 100% correct, but, I believe it's B.photosynthetic organisms to herbivores to carnivores and decomposers. I'm so sorry if it's wrong!

Explanation: looked all over go ogle.

Have a good morning, afternoon, or night!

~Dreamer1331~

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3 years ago

What effect will increased pressure have on 4A (g) + 5B (g) ---> 2C (g) + 7D (g)

Pie

Answer:

Option a. no change

Explanation:

The question makes sense only if the equation is an equilibrium reaction:

4A (g) + 5B (g) ⇄ 2C (g) + 7D (g)

This is, A and B react to produce C and D, forward reaction; and C and D react to form A and B, reverse reaction.

Then, you can study the effect of increased pressure using LeChatelier's principle.

To counteract the disturbing effect produced by increased pressure on the equilibrium, the system will react shifting the toward to the side where the pressure could be decreased.

That would be toward the side that has less gas molecules.

Since both sides have 9 molecules (4 + 5 = 2 + 7 = 9), the equilibrium concetrations will not change.

That is represented by the first choice: no change.

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4 years ago

How many joules are required to raise the temperature of a 6.50 g sample of silver from 34°c to 189°C? The specific heat of gold

nata0808 [166]

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Explanation:

Parameters given:

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