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Harlamova29_29 [7]
3 years ago
7

Because it lives for many years a maple tree is a

Chemistry
2 answers:
g100num [7]3 years ago
5 0
Perennial I think hdhfrfff
lara31 [8.8K]3 years ago
4 0

Answer:

perennial

Explanation:

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WHAT BLOCK IN THE PICTURE HAS:
GREYUIT [131]

Answer:

the highest is "A" and the lower is "C"

7 0
3 years ago
A 0.25-mol sample of a weak acid with an unknown Pka was combined with 10.0-mL of 3.00 M KOH, and the resulting solution was dil
Masteriza [31]

Answer : The value of pK_a of the weak acid is, 4.72

Explanation :

First we have to calculate the moles of KOH.

\text{Moles of }KOH=\text{Concentration of }KOH\times \text{Volume of solution}

\text{Moles of }KOH=3.00M\times 10.0mL=30mmol=0.03mol

Now we have to calculate the value of pK_a of the weak acid.

The equilibrium chemical reaction is:

                          HA+KOH\rightleftharpoons HK+H_2O

Initial moles     0.25     0.03        0

At eqm.    (0.25-0.03)   0.03      0.03

                     = 0.22

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[HK]}{[HA]}

Now put all the given values in this expression, we get:

3.85=pK_a+\log (\frac{0.03}{0.22})

pK_a=4.72

Therefore, the value of pK_a of the weak acid is, 4.72

7 0
3 years ago
Roughly how many times does Earth rotate during each complete revolution?
zalisa [80]
The Earth rotates 365 times during each complete revolution.

HOPE THIS HELPS! ^_^
6 0
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Several properties of the element magnesium are shown. Which one is a chemical property?
aniked [119]

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E

Explanation:

burning a substance changes it chemically.

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3 years ago
exothermic reaction in which the reaction releases energy as heat. 4. How would the reaction would change if you added 2 g of st
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Answer:

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We know that the composition of Steel includes Carbon and Iron. So, if 2g of steel wool was added to the iron acetate, then the iron acetate is now being reduced. What will happen is that the solution will be triggered as it becomes denser and get highly concentrated. Hence, an increase in concentration leads to a decrease in reaction rates. Thus, a slow reaction will take place, and the reaction rate will decrease.

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3 years ago
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