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ddd [48]
3 years ago
8

#1: Which type of substance is an electron-pair donor?

Chemistry
1 answer:
Aneli [31]3 years ago
7 0
Answer is: D. Lewis base.
Lewis acid is a chemical element, molecule or ion that contains an empty orbital which is capable of accepting an electron pair from a Lewis base. A Lewis base is element, molecule or ion that has a filled orbital and has electron pair which is not involved in bonding and can give it to Lewis acid. Lewis base is for example ammonia (NH3).
You might be interested in
Counting atoms and balancing....please help :)
Tresset [83]

Answer:

3H20 - 6

3NH4OH - 15

4Ca(C2H3O2)2 - 24

Explanation:

Not so sure but I tried

5 0
2 years ago
How many moles are present in 2.3 x 1023 molecules of NH3?
avanturin [10]

Answer:

<h2>0.38 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{2.3 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{2.3}{6.02}  \\  = 0.382059...

We have the final answer as

<h3>0.38 moles</h3>

Hope this helps you

5 0
2 years ago
The following equation represents which of the following types of reaction?
nataly862011 [7]

Answer:

A. decomposition.

Explanation:

Recall the types of chemical reactions and how they are typically written.

Synthesis : A + B ==> AB

Decomposition : AB ==> A + B

Double Replacement : AB + CD ==> AC + BD

Single Replacement : AB + C ==> AC + B

Now although it may seem that the given equation doesnt follow any of these as it has more parts, it follows decomposition.
Decomposition is simply a single compound being broken up into two or more products. So it can be written as ABC ==> A + B + C as well therefore the answer is A

3 0
2 years ago
Why sulphur used for food preservation?​
Greeley [361]

Answer:

It maintains the appearance of fruits and prevents rotting. It is used in soft drinks to preserve its color

Explanation:

Sulfur Dioxide is widely used as a food preservative because of the following reasons : It acts as an antioxidant.

3 0
3 years ago
Which element is a metalloid?<br><br> A. selenium<br> B. polonium<br> C. phosphorus <br> D. iodine
vladimir1956 [14]

Answer:

I believe C

Explanation:

6 0
3 years ago
Read 2 more answers
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