CHEMISTRY HIGH SCHOOL

What would the molecular formula be if lithium and sulfur reacted to form a neutral compound?A. LiS
B. LiS2
C. Li2S2
D. Li2S

Answers

Answer 1
Answer:

Answer:

D, Li2S

Explanation:

This is because Lithium, which is in group IA of the periodic table, has a charge of +1. Sulfur will have a charge of -2 because it is in group 6A in the periodic table, which means to balance these out, there needs to be 2 lithium ions which would result in a charge of +2. With Lithium now having a charge of +2 due to having two atoms in the compound, and sulfur already having a charge of -2 as one atom, these two cancel out meaning the compound is neutral.

Answer 2
Answer:

Answer: Li2S

Explanation:

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How many formula units are there in 0.9876 grams of zinc hydroxide

Answers

mass molar of  zinc hydroxide Zn(OH)2 = 99.424 g/mol

1 mole ----------> 99.424 g
 mole  ----------> 0.9876 g

mole = 0.9876 / 99.424

= 0.00993 moles of Zn(OH)2

1 mole ------------> 6.02x10²³ 
0.00993 ----------> units

units = 0.00993 * 6.02x10²³

= 5.977x10^21 formula units.

hope this helps!.

Explain the term "amphoteric"

Answers

A substance either an ion or a molecule that can act either an acid or a base depending on a medium is called Amphoteric. Some metals like zinc, tin, copper and aluminium which produce either metal oxides or hydroxides are examples of amphoteric. During the Amphoterism, the metal compound acts either an acid or a base depending on their oxidation state.

Which compound reacts with an acid to produce water and a salt(1) CH3Cl
(2) CH3COOH
(3)KCl
(3)KOH

Answers

KOH is the only base, and any neutralization reaction produces a salt and water
I'm not exactly sure which one but I do know that an acid and a base react in a aqueous solution to form water, so i would probably eliminate the ones that aren't aqueous solutions.

Given the incomplete equation representing an organic addition reaction:X(g) + Cl2(g)==> XCl2(g)
Which compound could be represented by X?
(1) CH (3) C3H8
(2) C2H4 (4) C4H10

Answers

The organic compound X in the given reaction is ethylene, C₂H₄. The two chlorine atoms are joined to the double bond of ethylene and form  C₂H₄Cl₂. Hence, option 2 is correct.

What is halogenation ?

Halogenation is the electrophilic addition of  any halogen atom such as Cl. F etc. to an organic compound mostly in the presence of acids. Halogens are more reactive towards alkenes and alkynes.

The unsaturated centers in the organic compound are electron deficient and they attract negative halogen ions forming respective halides. Ethylene is the primary alkene with the skeleton CH₂ =CH₂.

The incoming Cl groups attack the double bond and joins the carbon atom to form CH₂Cl  - CH₂Cl or C₂H₄Cl₂. Hence, the compound X in the given reaction is C₂H₄Cl₂. Thus, option 2 is correct.

Find more on halogenation :

brainly.com/question/24751735

#SPJ3
Only C2H4 will react to give this product since it is the only reactant that contains a carbon-carbon double bond.

The Dome of the Rock and Al-Aqsa Mosque are located in what city?Jerusalem
Cairo
Damascus
Baghdad

Answers

They are located in Jerusalem.

Old City of Jerusalem

A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as(1) an ionic compound
(2) a molecular compound
(3) a metal
(4) a nonmetal

Answers

Answer: Option (1) is the correct answer.

Explanation:

An ionic compound is the compound which is composed of oppositely charged ions.

When an ionic compound is in a solid state, then oppositely charged ions are held together by strong electrostatic force of attraction. To break is force of attraction, high energy is required. That is why, ionic compounds do not conduct electricity as a solid.

Whereas in melted state, the ions are less tightly held and as a result they can move easily  from one place to another. Also in melted state, ionic compounds act as strong electrolyte. Hence, they are able to conduct electricity.

On the other hand, molecular compounds are poor conductors of electricity and non-metals do not conduct electricity. Whereas a metal is a good conductor of electricity even in its solid state.

Thus, we can conclude that a substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as an ionic compound.
Ionic compunds are able to conduct electricity when molten/in solution, but not when they are solid
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