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just olya [345]
4 years ago
5

When solutions containing silver ions and chloride ions are mixed, silver chloride precipitates: Ag+(aq)+Cl−(aq)→AgCl(s)ΔH=−65.5

kJ. Calculate ΔH for formation of 0.490mol of AgCl by this reaction.
Chemistry
2 answers:
KATRIN_1 [288]4 years ago
5 0
<span>Arrhenius acid is acid which gives the H+ and arhenius base is one which donates the -OH group thats why it can identify</span>
laiz [17]4 years ago
4 0

Answer:

The ΔH for the formation of 0.490 mol of AgCl is - 32.095 kJ.

Explanation:

Ag⁺(aq)+Cl⁻(aq)→ AgCl(s) ΔH=−65.5kJ

We need to consider that the value of ΔH given is for each mol of AgCl formed.

1 mol AgCl ________________ - 65.5 kJ

0.490 mol AgCl ____________      x

x = - 32.095 kJ

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When a chemical reaction occurs, atoms rearrange to form new compounds, but no new atoms are created nor are any destroyed. this
Genrish500 [490]
Electrons and neautrons
3 0
3 years ago
Indicate whether each of the following compounds will gave an acidic, basic or neutral solution when dissolved in water. Clear A
allsm [11]

Answer: ammonium bromide : acidic : The pH will be less than 7.

potassium cyanide : basic :The pH will be more than 7.

calcium nitrate: neutral : The pH will be approximately equal to 7.

calcium hypochlorite : basic :The pH will be more than 7.

Explanation:

pH is defined as the negative logarithm of hydrogen ion concentration. The scale ranges from 0 to 14.

When a solution is acidic, it will show a pH in the range of 0 - 6.9. When a solution is basic, it will show a pH in the range of 7.1 - 14. When a solution is neutral, it will show a pH of 7.

ammonium bromide : NH_4Br : acidic as it is formed from the combination of strong acid HBr and weak base NH_4OH

potassium cyanide :KCN:  basic, as it is formed from the combination of weak acid HCN and strong base KOH

calcium nitrate: Ca(NO_3)_2 : neutral, as it is formed from the combination of strong acid and strong base.

calcium hypochlorite :  Ca(ClO)_2 : basic, as it is formed from the combination of weak acid HOCl and strong base Ca(OH)_2

3 0
4 years ago
What is the definition of thermal expansion
MissTica

Answer:

Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in temperature.

Explanation:

8 0
4 years ago
Elemental analysis of the unknown gas from part a revealed that it is 30.45% n and 69.55% o. what is the molecular formula for t
Gnesinka [82]

Assuming we have 100 g of sample

30.45/MW of N 14g = 2.175

69.55/MW of O 16g = 4.34

4.34/2.185 = 2

for every 1 mole of N we have 2 moles of O

so the empirical formula would be NO2

without having the molecular weight of the entire molecule the molecular formula can not be determined with the information in your question

6 0
3 years ago
What amount of heat, in kJ, is required to vaporize 163.45 g of ethanol (C₂H₅OH)? (∆Hvap = 43.3 kJ/mol)
Allushta [10]

Answer:

Amount of heat required = 153.62 J

Explanation:

Given:

Mass = 163.45 g

∆Hvap = 43.3 kJ/mol

Molar mass C₂H₅OH = 46.07 g/mol

Find:

Amount of heat required

Computation:

Amount of heat required = Number of moles x Molar mass C₂H₅OH

Amount of heat required = [163.45/46.07][43.3]

Amount of heat required = 153.62 J

3 0
3 years ago
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