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ruslelena [56]
2 years ago
10

You have 30mL of hot cocoa, but it’s way too sweet. You add hot water until there’s 70mL of hot cocoa and determine that the fin

al molarity is 2M, just the way you like it. What was the initial molarity of hot cocoa?
Chemistry
1 answer:
attashe74 [19]2 years ago
5 0
What is the answer to this question
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What is ΔG° at 298 K for the following equilibrium? Ag+(aq) + 2NH3(aq) Ag(NH3)2+(aq); Kf = 1.7 × 107 at 298 K a. 41 kJ b. 0 c. –
jekas [21]

Answer:

ΔG° = 41.248 KJ/mol (298 K); the correct answer is a) 41 KJ

Explanation:

Ag+(aq)  +  2NH3(aq)  ↔ Ag(NH3)2+(aq)

⇒ Kf = 1.7 E7; T =298K  

⇒ ΔG° = - RT Ln Kf.....for aqueous solutions

∴ R = 8.314 J/mol.K

⇒ ΔG° = - ( 8.314 J/mol.K ) * ( 278 K ) ln ( 1.7 E7 )

⇒ ΔG° = 41248.41 J/mol * ( KJ / 1000J )

⇒ ΔG° = 41.248 KJ/mol

7 0
3 years ago
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9. Mr. James owns 12 gas stations in Newport News. He wants to build a
irga5000 [103]

Answer:

Option C, developmental view point

Explanation:

A person with preservationist viewpoint will think of only preserving the natural resources and the environment. While a person with a conservationist viewpoint will think of conserving the landscape, architecture, heritage, culture, buildings, rituals, etc.  

However, a person with developmental viewpoint will think of developing resources at ease. He/She will prioritize development and comfort of customer above all.  

Hence, option C is correct

3 0
2 years ago
How many grams of NaOH are needed to make 250mL of a 0.1M NaOH solution?
Sloan [31]

Answer:

To make 250 ml of 0.1 M NaOH, you dissolve 1 gram NaOH in enough water to make a final volume of 250 mls.

Explanation:

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3 0
2 years ago
What is the molecular geometry if you have 3 single bonds and 1 lone pair around the central atom?
Elodia [21]

Answer:

There are 2 double bond units and 1 lone pair, which will try to get as far apart as possible - taking up a trigonal planar arrangement. Because the lone pair isn't counted when you describe the shape, SO2 is described as bent or V-shaped.

Explanation:

There are 2 double bond units and 1 lone pair, which will try to get as far apart as possible - taking up a trigonal planar arrangement. Because the lone pair isn't counted when you describe the shape, SO2 is described as bent or V-shaped.

7 0
3 years ago
Which best describes two ways in which hydrogen is involved in photosynthesis?
sveticcg [70]

Answer:

C

Explanation:

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4 0
3 years ago
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