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s2008m [1.1K]
3 years ago
8

In the modern periodic table, elements are arranged according to increasing ____. (1 point). . a. atomic number. b. atomic mass.

c. date of discovery. d. electrical conductivity
Chemistry
1 answer:
ki77a [65]3 years ago
5 0
I think the correct answer from the choices listed above is option A. In the modern periodic table, elements are arranged according to increasing <span>atomic number. The atomic number represents the number of protons present for a specific atom.</span>
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777dan777 [17]
The answer is a, because the population number has increased.
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3 years ago
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What are the ion concentrations in a 0.12 M solution of AlCl3? A) 0.12 M Al3+ ions and 0.040 M Cl- ions B) none of the answers C
KIM [24]

Answer:

D

Explanation:

To answer this question, we will need to write the dissociation equation of aluminum trichloride.

AlCl3 ——-> Al3+ + 3Cl-

It can be seen that when aluminum chloride dissociates, it gives one mole of aluminum ion and three moles of the chloride ion.

From here we can see that the concentration of the aluminum chloride equals that of the aluminum ion while that of the chloride ion is thrice that of the aluminum chloride. This means we simply multiply 0.12M by 3 to get the molarity of the chloride ion while that of the aluminum ion remains the same

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3 years ago
Ch3cooh (acetic acid) can form hydrogen bonds between its molecules. based on the lewis structure shown below, how many hydrogen
never [62]
Answer:
           Number of Hydrogen Bond Acceptor atoms  =  2

           Number of Hydrogen Bond Donor atoms  =  1

Explanation:
                   Hydrogen bond interactions are formed between those molecules which contains partial positive hydrogen atoms bonded covalently to most electronegative atoms like Oxygen, Nitrogen and Fluorine. 
                   When hydrogen is attached to Oxygen, Nitrogen or Fluorine its electron density decreases and gets partial positive charge, this partial positive charged hydrogen atom then makes hydrogen bonding with the most electronegative element (partial negative) of neighbor molecule.
                    In Acetic acid there are two oxygen atoms hence there are two most electronegative elements therefore, two Hydrogen Bond Acceptor atom and each oxygen atom can accept two hydrogen bonds.
                    Also, it contains only one Hydrogen atom attached to oxygen atom so it has one Hydrogen Bond Donor atom.

4 0
3 years ago
3.30 moles of pyrophyllite, Al2Si4O10(OH)2<br><br>How many moles of Al are in this compound?
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33.33 moles in AI. Because it is just to use a diffrent site

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3 years ago
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The valencies of metal a,band c are 1,2,3respectively what is the formula of hydroxide of a
Luba_88 [7]

The formula of metal hydroxides for

A) metal A = A(OH)

B) metal B = B(OH)₂

C) metal C = C(OH)₃

<h3>What are hydroxides?</h3>

When a metal's oxide combines with water, a hydroxide is created.

The general formula of hydroxide is:

M(OH)ₙ

where n is the valency of metal.

OH has a valency of -1

A) The formula of hydroxide of metal A:

The valency of metal A is 1

This means, here, n = 1

Therefore, the metal hydroxide formula will be = A(OH)

B) The formula of hydroxide of metal B:

The valency of metal B is 2

This means, here, n = 2

Therefore, the metal hydroxide formula will be = B(OH)₂

C) The formula of hydroxide of metal C:

The valency of metal C is 3

This means, here, n = 3

Therefore, the metal hydroxide formula will be = C(OH)₃

Learn more about formula of hydroxides here:

brainly.com/question/23442676

#SPJ4

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