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lina2011 [118]
3 years ago
5

Zn2s + 4 AgNO3ag -> 2 Zn(NO3)2ag + 4 Ags

Chemistry
1 answer:
emmasim [6.3K]3 years ago
6 0

Answer:

- 0.927 moles of AgNO₃

- 87.7 g of Zn(NO₃)₂

- 13.6 g of Zn

Explanation:

The reaction is:

2Zn(s) + 4AgNO₃ (aq) →  2Zn(NO₃)₂(aq) + 4 Ag(s)

First of all we need to determine the moles of silver that were produced

100 g / 107.87 g/mol = 0.927 moles of Ag

As the limiting reactant is the nitrate, we determine that ratio is 4:4

If I made 4 moles of silver, I used 4 moles of nitrate. In conclusion, 0.927 moles of Ag were made by 0.927 moles of nitrate

If we still assume, that the Zn is in excess we use the 0.927 moles of silver nitrate. Ratio is 4:2 so the rule of three will be:

4 moles of silver nitrate can produce 2 moles of zinc nitrate

0.927 moles of silver nitrate will produce (0.927 . 2) / 4= 0.463 moles of zinc nitrate. We convert the moles to mass → 0.463 mol . 189.41 g /1mol = 87.7 g

We need to determine the moles of silver that are produced

45 g / 107.87 g/mol = 0.417 moles

As the zn is in excess, we used the silver nitrate as the limiting reagent. Ratio was 4:4, so 0.417 moles were produced by 0.417 moles of AgNO₃

By stoichiometry, 4 moles of silver nitrate react with 2 moles of solid zinc. The rule of three will be: 4 moles of silver nitrate react with 2 moles of Zn

Then, 0.417 moles of AgNO₃ will react with (0.417 . 2) /4 = 0.208 moles of Zn

We convert the moles to mass → 0.208 mol . 65.41 g/ 1mol = 13.6 g

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Four moles of Argon gas are at a pressure of 1.90 atm, and the temperature is 50 degrees C. What is the volume of the gas?
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N = 4 moles of Ar2, P = 1.90 atm, V = ?
T = 50C = 273 + 50K = 323K
PV = nRT --> V = nRT/P
V = (4)(.0821)(323)/1.90
V = 106.07/ 1.9
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2 years ago
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I Believe That The Answer Is A 
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vaieri [72.5K]

Answer:

1) Decomposition

2)Double-replacement reaction

3)synthesis

4)Double-replacement reaction

5)single-replacement reaction

6)Double-replacement reaction

Explanation:

Step 1: Data given

Synthesis: This is a reaction where two or more reactants will combine to form a new, single product. This is  occurs when two or more reactants combine to form a single product.  This can be shown with the following equation.

A + B → C

A and B are the reactants to form a new product C

Decomposition: This is a reaction where 1 (more complex) compound will be broken down into 2 or more (more simple)  products.

This can be shown by the following equation:

AB → A + B

A single replacement: This is a reaction where one element wil be replaced by another element in the same compound. This can be shown by the following equation:

A + BC → B + AC

Here is the elemnt B in the compound BC, replaced by the element A, to form a new compound AC

A double-replacement: This is a reaction where the positive and negative ions of two ionic compounds will be exchanged and 2 new compounds willbe formed. This can be shown by the following equation:

AB+CD→AD+BC

A combustion reaction requires oxygen gas (O2) to produce the  products CO2 and H2O

Step 2:

1) 2HgO(s) → 2Hg(l) + O2(g)

⇒ Decomposition

2) KCl(aq) + AgNO3(aq) → AgCl(s) + KNO3(aq)

⇒  Double-replacement reaction

3) 2Na(s) + H2(g) → 2NaH(s)

⇒ synthesis

4) Mg(OH)2(aq) + 2HNO2(aq) → Mg(NO2)2(aq) + 2 H2O(l)

⇒  Double-replacement reaction

5) Ca(s) + 2AgNO3(aq) → Ca(NO3)2(aq) + Ag(s)

⇒  Single-replacement reaction

6) Al2O3(s) + H2SO4(aq) → Al2(SO4)3(aq) + H2O(l)

⇒  Double-replacement reaction

8 0
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Answer:

c. Can't decide with information given.

Explanation:

The chemical and physical processes can be classified as endothermic or exothermic. The first one happens when the system absorbs heat, so the temperature of the surroundings will decrease, and the other one happens when the system releases heat, then the temperature of the surrounds will increase.

Precipitation is the formation of a solid in a solution. The process can happen with absorption or release of heat, it depends on the substance. So, with the information given it's impossible to say it.

3 0
3 years ago
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nydimaria [60]

Answer:

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Explanation:

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