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gayaneshka [121]
2 years ago
11

HELP ME OUT PLS!!!!!

Chemistry
1 answer:
RUDIKE [14]2 years ago
8 0

Answer:

C

Explanation:

Well Its called reaction force,  so that helps you figure out what direction she would go towards. When you use anything that has reaction force what way are they normally going? So thats why she stayed still.

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A chemist must dilute 47.2 mL of 150. mM aqueous sodium nitrate solution until the concentration falls to . He'll do this by add
erma4kov [3.2K]

Answer:

0.295 L

Explanation:

It seems your question lacks the final concentration value. But an internet search tells me this might be the complete question:

" A chemist must dilute 47.2 mL of 150. mM aqueous sodium nitrate solution until the concentration falls to 24.0 mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Be sure your answer has the correct number of significant digits. "

Keep in mind that if your value is different, the answer will be different as well. However the methodology will remain the same.

To solve this problem we can<u> use the formula</u> C₁V₁=C₂V₂

Where the subscript 1 refers to the concentrated solution and the subscript 2 to the diluted one.

  • 47.2 mL * 150 mM = 24.0 mM * V₂
  • V₂ = 295 mL

And <u>converting into L </u>becomes:

  • 295 mL * \frac{1 L}{1000mL} = 0.295 L

6 0
3 years ago
Imagine a balloon is made from a membrane that's permeable to water but not sucrose molecules. How would the concentration of su
Blababa [14]

Answer:

The concentration of sucrose will decrease.

Explanation:

The balloon contains 50% sucrose solution.

Diffusion is the net movement of the substance from the region of the higher concentration to the region of the lower concentration.

Given that the membrane is only permeable to water not sucrose. So, movement of sucrose will not take place. <u>When the balloon is placed in a beaker of water, by the process of diffusion, the water moves from beaker to balloon and thus, the balloon will expand and the concentration of sucrose solution will decrease.</u>

4 0
3 years ago
How does the law of conservation of mass apply to this reaction: Mg + HCl → H2 + MgCl2?
erastova [34]

Answer: The correct answer is A. Hydrogen and chlorine need to be balanced. There's an equal amount of magnesium on each side.

6 0
2 years ago
Read 2 more answers
X = (2 x 103)(7 x 105)
Sonbull [250]

Answer:

x=1.4*10^9

or choice a

Hope this helps and please mark me brainliest! <3 >//<

3 0
2 years ago
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What is 1+2...................
Morgarella [4.7K]

Answer:

There are many different answers to that question but i believe, will all of the knowledge i have attained, that the answer is 3

Explanation:

7 0
3 years ago
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