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kenny6666 [7]
3 years ago
11

Which is an example of poor safety practices when working outdoors

Chemistry
2 answers:
saveliy_v [14]3 years ago
8 0

Answer:

touching a chemical with his or her bare skin.

kati45 [8]3 years ago
7 0

Answer:

C

Explanation:

u can't touch a chemical with bare skin

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Explanation:

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What is an example of a cation<br><br> what’s an example of a cation
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Starting from a 1 M stock of NaCl, how will you make 50 ml of 0.15 M NaCl?
WARRIOR [948]

Answer:

We need 7.5 mL of the 1M stock of NaCl

Explanation:

Data given:

Stock = 1M this means 1 mol/ L

A 0.15 M solution of 50 mL has 0.0075 moles NaCl per 50 mL

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The moles of solute will be constant

and n = M*V  

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⇒ with M1 = the initial molair concentration = 1M

⇒ with V1 = the volume we need of the stock

⇒ with V2 = the volume we want to make of the new solution = 50 mL = 0.05 L

⇒ with M2 = the concentration of the new solution = 0.15 M

1*V1 = 0.15*(50)

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Since 0.0075 L of 1M solution contains 0.0075 moles

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We need 7.5 mL of the 1M stock of NaCl

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