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julia-pushkina [17]
3 years ago
7

Someone help me to these please i dont have much time

Chemistry
2 answers:
Natali [406]3 years ago
6 0

Answer:

2

Explanation:

it is #2. the answer is 2

alex41 [277]3 years ago
6 0

Answer:

Hope this will help you.... Take care

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Convert 121 Cal to kilowatt-hours
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Answer:

here

Explanation:

0.000141 to kilowatt-hours. hope this helped

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Use the word bank to complete the charts about the metrics system measurement
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Length

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I don't know why mass is there but hope this helps! :)

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This for number 8 and 9
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Elements in Group 4A
steposvetlana [31]

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3 years ago
You work for a cutlery manufacturer who wants to electrolytically precipitate 0.500 g of silver onto each piece of a batch of 25
ICE Princess25 [194]

Answer:

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

Explanation:

Mass of silver to be precipitated on ecah spoon = 0.500 g

Number of silver spoons = 250

Total mass of silver = 250 × 0.500 g = 125 g

Moles (n)=Molarity(M)\times Volume (L)

Moles of AgCN = n  = \frac{125 g}{134 g/mol}=0.9328 mol

Volume of AgCN solution =V

Molarity of the AgCN = 2.50 M

V=\frac{0.9328 mol}{2.50 M}=0.3731 L=373.1 mL

(1 L = 1000 mL)

373.1 mL of AgCN (aq) must be poured into your electrolysis vat to ensure you have sufficient Ag to plate all of the forks.

6 0
3 years ago
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