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snow_lady [41]
3 years ago
6

Determine the Mass Number of the Following Elements:

Chemistry
1 answer:
Phantasy [73]3 years ago
5 0

Answer:

Al 28

B 11

C 14

Sc 46

Na 24

Explanation:

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Sample A: 300 mL of 1M sodium chloride
pantera1 [17]

Answer:

Sample A

Explanation:

Molarity of a solution can be calculated using the formula:

Molarity = number of moles (mol) ÷ volume (vol)

For Sample A:

V = 300ml = 300/1000 = 0.3 L

Molarity = 1M

n = number of moles (mol)

1 = n/0.3

n = 0.3moles

For Sample B:

V = 145 mL = 145/1000 = 0.145L

Molarity = 1.5 M

n = number of moles

1.5 = n/0.145

n = 1.5 × 0.145

n = 0.22 moles

Based on the above results (moles), sample A with 0.3 moles contains the larger concentration of sodium chloride.

6 0
3 years ago
What happens when a chemical is determined to be dangerous?
kakasveta [241]
If not in use dispose it or when you need keep it from children
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What kind of cell is represented by the diagram shown above?( I have 5mins plz answer quick).
Masja [62]

Answer: can't be animals or or plants its eater C or D but C can be correct.

Check tho.

3 0
3 years ago
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What in the world is this !
Olin [163]

Answer:

the symbol shows that the reaction is reversible

7 0
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What do you predict will happen to the volume inside a container when pressure & temperature remains constant but the number
Pani-rosa [81]

Answer:

<u>increase</u>

Explanation:

<u>The Ideal Gas Equation</u>

  • PV = nRT
  • V = nRT/P
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The volume of a gas is directly proportional to the number of moles it contains. Hence, if the number of particles is increased, then the volume inside the container will <u>increase</u>

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2 years ago
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