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Elena-2011 [213]
3 years ago
13

Which of the following is an example of a Lewis acid?

Chemistry
1 answer:
Agata [3.3K]3 years ago
4 0

Answer:

C. BF3

Explanation:

The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid.

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What kind of melocule is water?A:nonpolarB:ionicC:polarD:charged
hram777 [196]
The correct answer is:  [C]:  "polar" .
_____________________________________________________  
   " Water " ; which is:  " H₂O " ; 
_____________________________________________________
is a:
_____________________________________________________

  — polar;  → {eliminate:  "Choice  [A]:  "non-polar"} ;

                  → {and consider:  "Choice: [C]:  "polar" } ; 

  — covalent; → {not "ionic";  eliminate:  "Choice:  [B]:  "ionic"} ;

  — uncharged;  → {neutral compound; not "charged" —but "balanced"} ; 
 
                           →  {Note:   " H ⁺ ,  O ²⁻  ;   →   " H₂O " } ;

                           →  The "charges" balance/ cancel out. 

                           →  {eliminate:  "Choice:  [D]:  "charged" .}.
_______________________________________________________
    — 
compound.
_______________________________________________________       

The correct answer is:  [C]:
 "polar" .
_______________________________________________________
6 0
4 years ago
A mixture was found to contain 1.05g of SiO2, 0.69g of cellulose and 1.82g of calcium carbonate. What percentage of calcium carb
mihalych1998 [28]
1,05g+0,69g+1,82g=3,56g\\\\
3,56g \ \ \ \Rightarrow \ \ \ 100\%\\
1,82g \ \ \ \Rightarrow \ \ \ x\\\\
x=\frac{1,82g*100\%}{3,56g}\approx 51,12\%
5 0
3 years ago
Read 2 more answers
Which of the following best describes a vacuum?<br> Hot<br> Cold <br> Shiny<br> Empty
wel

Answer:

shiny

Explanation:

4 0
3 years ago
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Somebody help me please i'm tired of trying to solve this problem ༎ຶ‿༎ຶ​
Elenna [48]

Answer:

Q    Line     A

A: (a) 0 (b) 20

B: (b) 10 (c) 10

C: (c) 10 (d) 10

D: (d) 10 (e) 13

E: (e) 13 (f) 0

F: (f) 0 (g) 0

a: The velocity is whatever you need to see when you are specifically using a numberline so the answer for a is just 10

b: The velocity for this one is not as easy as the last one, its 7.

Explanation:

When you have a number line and your trying to find a numberline, you just have to subtract the smaller line to the largest number but if you are trying to find the velocity in beetween more than one thane you add the two biggest ones and subtract the smallest one and if you make a wrong move like add the biggest and smalles youll... still get the same answer so it doesnt matter really but its just easier to do the smallest one as the subtracting number just FYI. Happy spring break!

5 0
2 years ago
I WILL GIVE BRAINLYEST 40+ POINTS
Talja [164]

Answer:

The correct answer is A.

Explanation:

Helium's Atomic Model has 2 Protons and 2 Neutrons, and on the outside it has 2 electrons circling around it.

7 0
3 years ago
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