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-Dominant- [34]
2 years ago
6

The diameter of a circle is 12 feet. What is the circle's circumference?Use 3.14 for pie

Chemistry
1 answer:
sergejj [24]2 years ago
8 0

Answer:

37.7 ft

Explanation:

crown plz

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AnnyKZ [126]
It might me b but I am not sure
3 0
2 years ago
[H+] = 2.5 x 10-10 M<br> What’s the pH
Reika [66]

Answer:

9.6

Explanation:

pH = - log[2.5*10^{-10}]= 9.6

6 0
3 years ago
A displacement reaction takes place when calcium is placed in a solution of zinc chloride. Which substances will most likely be
Karolina [17]

Hi!


The correct option would be A.


This is because the displacement reaction would take place as follows

Ca + ZnCl2 --> CaCl2 + Zn


A displacement reaction is one in which a substitution occurs, as the more reactive element in the mixture replaces one that is less reactive.

In the electrochemical series, we find Ca higher than Zn, which is indicative of Ca being more reactive, and having the capacity to displace Zn to form a compound.


Option D would be incorrect as no such substitution occurs.

Option B would be incorrect because again, there is no substitution occurring, and also because two metals alone (Ca and Zn in our case) can never react to form a compound.

Option C would be incorrect because it is not possible because CaCl and ZnCl are forms that are too unstable to exist due to an overall positive charge.


Hope this helps!

5 0
3 years ago
What are the representative elements? Where are they located
WINSTONCH [101]
The representative elements are elements where the s and p orbitals are filling. The transition elements are elements where the d orbitals (groups 3–11 on the periodic table) are filling, and the inner transition metals are the elements where the f orbitals are filling.
4 0
3 years ago
How does Controlled fires help prevent real forest fires?
Salsk061 [2.6K]

Answer:

it burns things which would be burned easily by lightning, and then people put the fire out immediately.  If the dried plants that they are lighting on fire are hit by lightning, it can lead to a massive fire without anyone realizing.  

6 0
2 years ago
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