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Kay [80]
3 years ago
13

A boron atom has ____ electrons at the first energy level and ____ electrons at the second energy level.

Chemistry
1 answer:
mylen [45]3 years ago
5 0

Answer: A boron atom has 2 electrons at the first energy level and 3 electrons at the second energy level.

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The _____ ______ ______ is the average of ______ _____ of a particular atom.
Svetach [21]

The average atomic weight is the average of weighted mass of a particular atom.

The weighted average mass of the atoms in a naturally occurring sample of an element is the average atomic mass, also known as atomic weight.

The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element.

Therefore, the average atomic weight is the average of weighted mass of a particular atom.

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6 0
2 years ago
A solution has a pH of 12. This solution is:
kolezko [41]

Answer:

basic

Explanation:

pH 7: neutral

12>7

so it is basic

(if <7 than acidic)

3 0
3 years ago
What are the half-reactions for a galvanic cell with aluminum and gold electrodes?
s344n2d4d5 [400]

Answer: B

Explanation:

4 0
2 years ago
A when sulfuric acid is added to sirie, hydrager
irga5000 [103]

Sulfuric acid is prepared industrially by means of the response of water with sulfur trioxide which in turn is made by way of a chemical combination of sulfur dioxide and oxygen both by way of the touch system or the chamber system.

                         H2SO4 (l) H2O (g) + SO3 (g).

The reaction is highly exothermic as an enormous amount of heat is liberated.

The usual approach is to dilute the sulfur trioxide in sulphuric acid. This produces oleum. SO3 (g) + H2SO4 → H2S2O7 (1) Oleum can be in addition diluted in water to acquire concentrated sulphuric acid.

An acid catalyst is added to protonate the carbonyl carbon. How does this catalyze the response, robust acid catalysts catalyze the hydrolysis and transesterification of esters which enables the mechanism with a view to boom the electrophilicity of the carbonyl carbon to assist protonate the carbonyl oxygen.

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8 0
2 years ago
Differentiated cells will first organize themselves into ________
ziro4ka [17]
It's TISSUES.
CELLS, TISSUES, ORGANS, ORGAN SYSTEM, NEW ORGANISM
3 0
3 years ago
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