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podryga [215]
3 years ago
13

How would I solve this problem? 15 = 10z/[2-(5x4)]

Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
3 0
15=10z/(2-20)
15=10z/(-18)
15=5z/(-9)
3=z/(-9)==>z=3x(-9)=-27
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4. Why do elements in the same family generally have similar properties?
snow_tiger [21]
Because they have the same number of electrons in the outer shell, they have the same reactivity (they all want to lose/gain a certain amount of electrons to have a full shell of 8), so they have the similar melting, boiling points etc because they all undergo very similar reactions to certain factors so have similar outcomes
7 0
4 years ago
A1(NO3)3 name, formula for cation an formula for anion
Nostrana [21]

Answer:

Explanation:

The name of the compound is:

       Al(NO₃)₃ is Aluminium nitrate

Aluminium nitrate is an ionic compound formed when Al loses 3 valence electrons to the nitrate.

Formula of cation: A cation is a positive charged specie

              Al³⁺

 Formula of anion: Anion is a negatively charged specie;

             NO₃⁻

7 0
3 years ago
What electrons in an atom take part in chemical bonding, and what are they called
nignag [31]

Explanation:

The electrons in the outermost electron shell are responsible for forming chemical bonds. These electrons are also known as valence electrons

4 0
3 years ago
Ca + AgCl (Single Replacement Reactions) PLEASE HELP
mihalych1998 [28]

Answer:

2Ag + CaCl2

Explanation:

https://en.intl.chemicalaid.com/tools/equationbalancer.php?equation=Ca+%2B+AgCl+%3D+Ag+%2B+CaCl2 use that website for chemistry

3 0
3 years ago
Identify ammonia. a. strong electrolyte, strong base b. weak electrolyte, strong base c. strong electrolyte, weak base d. nonele
dedylja [7]

Answer:

Ammonia is a weak electrolyte, weak base.

Option e.

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It is a base, because it takes proton.

When a compound can take protons, we know that is base, according to Bronsted Lowry theory.

We can't describe ammonia as a base, according to Arrhenius, but we know it is base according to Lewis, because the N from the ammonia can be a donor of its electron pair.

It is weak because an small amount of ammonia, can react to produce ammonium, between the protons of water. This is the equilibrium, where the ammonia is considered as the conjugate strong acid of ammonia.

NH₃ +  H₂O  ⇄  NH₄⁺  +  OH⁻     Kb

All the amines are considered as weak bases, because they look like ammonia, where the H of NH₃ are replaced by others chains.

------NH₂

-----NH-----

     

8 0
3 years ago
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