CHEMISTRY HIGH SCHOOL

How many centimeters would be one - half of a meter beA. 100
B. 500
C. 50
D. 5

Answers

Answer 1
Answer:

~Hello There!~

Considering that there are 100 cm in a meter, half of that would be 50.

Your answer is C. 50.

Hope This Helps You!

Good Luck :)

Have A Great Day ^_^

- Hannah ❤

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What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl?

Answers

First you need to find the balanced chemical formula.
CuCl₂+2NaNO₃→2NaCl+Cu(NO₃)₂

Then you can find out how much NaCl 31.0g of CuCl₂ should produce using stoichiometry.  Divide 31.0g by the molar mass of CuCl₂ (134.446g/mol) to get 0.2306mol CuCl₂.  Than multiply 0.2306mol CuCl₂ by 2 to get 0.4612mol NaCl.  Than multiply 0.4612mol by the molar mass of NaCl (58.45g/mol) to get 26.95g of NaCl.
that means that 100% yield would give you 26.95g of NaCl so to find percent yield divide 21.2 by 26.95 to get 0.7867 which is 78.7% yield

Therefore the answer is 78.7% yield.
I hope this helps.  Let me know if anything is unclear

Water entering a confined aquifer takes ________________. centuries decades weeks days

Answers

the correct answer is centuries
It would take centuries to make confined aquifer

Based on the results of testing colorless solutions with indicators, which solution is most acidic?(1) a solution in which bromthymol blue is blue
(2) a solution in which bromcresol green is blue
(3) a solution in which phenolphthalein is pink
(4) a solution in which methyl orange is red

Answers

On litmus paper (the slip of paper that changes color to measure acidity), the redder the color is, the more acidic it is. 
Therefore, the solution that is most acidic is methyl orange because it was a darker red then any of the others.

Answer: Methyl Orange (#4)

Hope this helped!! :D
Bromothymol blue is blue in a basic solution (yellow in acid).Bromocresol green is blue in a basic solution (yellow in acid).
Phenolphthalein is pink in a basic solution (colorless in acid).Methyl orange is red in an acidic solution. Therefore, the most acidic solution is #4.

Which correctly defines a basic solution?a. [H+] is not present.
b. [H+] is equal to [OH−].
c. [H+] is less than [OH−].
d. [H+] is greater than [OH−].

Answers

C. A basic solution is defined as a solution which has more hydroxide (OH-) ions than hydronium ions (H+)
H+ is less than OH- .

For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing.True
False

Answers

The statement "For water to become a mechanical weathering agent through ice wedging, it needs to go through a cycle of freezing and thawing." is true

What is used up in and stops a chemical reaction?

Answers

Answer:

This question is incomplete but the completed question is below

What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant

The correct option is (b)

Explanation:

A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).

A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.

Hi

The chemical reaction does not stop until the reagent is used .


I hope that's help !

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