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Assoli18 [71]
4 years ago
10

Element X is in Group 2 and element Y is in Group 17. A compound formed between these two elements is most likely to have the fo

rmula:
a.X2Y7
b.XY2
c.X7Y2
d.X2Y
Chemistry
2 answers:
Fofino [41]4 years ago
8 0
The answer is:  XY₂ .
_____________________________________
For example:
______________________________________
   MgCl₂  
______________________________________
-BARSIC- [3]4 years ago
3 0

Answer: The correct option is B.

Explanation: We are given that Element X is present in Group 2, so its valence electronic configuration will be: [\text{Noble gas}]ns^2 . It will loose 2 electrons in order to attain stable electronic configuration.

Element Y is present in Group 17, so its valence electronic configuration is: [\text{Noble gas}]ns^2np^5 .It will gain 1 electron to attain stable electronic configuration.

Hence, we can say that 2 atoms of Y-element will be required to combine with 1 atom of X-element.

Therefore, the formula becomes XY_2.

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Give examples of how land resources are used in a city setting
poizon [28]

Answer:

Land resources such as gravel and bedrock are used to construct buildings, roads, and sidewalks. Land is also where city structures—such as buildings, roads, and sidewalks—are constructed. People use land resources such as bedrock and aggregate to construct buildings, roads, and sidewalks.

I hope this answer helps

5 0
3 years ago
Read 2 more answers
Number 4 Please Help!!!!
Dominik [7]

Answer: c i think

Explanation:

5 0
3 years ago
What is the equilibrium constant, KC if the reaction is a gas phase reaction? (Ans.: Gas: KC = 0.328 dm3/mol)
valentina_108 [34]

Answer:

Equilibrium constant Kc = Qc = quotient of reactant(s) and product(s)

Kc = [C]x[D]y..../[A]m[B]n..... = 0.328dm3/mol, where [C]x[D]y is the product and [A]m[B]n is the reactant(Both in gaseous states)

Explanation:

When a mixture of reactants and products of a reaction reaches equilibrium at a given temperature, its reaction quotient always has the same value. This value is called the equilibrium constant (K) of the reaction at that temperature. As for the reaction quotient, when evaluated in terms of concentrations, it is noted as Kc.

That a reaction quotient always assumes the same value at equilibrium can be expressed as:

Qc (at equilibrium) = Kc =[C]x[D]y…/[A]m[B]n…

This equation is a mathematical statement of the law of mass action: When a reaction has attained equilibrium at a given temperature, the reaction quotient for the reaction always has the same value.

6 0
3 years ago
Which balanced equation represents a redox reaction? a. AgNO3(aq) +NaCl(aq) →AgCl(s) +NaNO3(aq) b. H2CO3(aq) →H2O() + CO2(g) c.
Aleks [24]

Answer : The correct option is, (D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

Explanation :

(A) AgNO_3(aq)+NaCl(aq)\rightarrow AgCl(s)+NaNO_3(aq)

This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.

(B) H_2CO_3(aq)\rightarrow H_2O(l)+CO_2(g)

This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.

(C) NaOH(aq)+HCl(aq)\rightarrow NaCl(s)+H_2O(aq)

This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.

(D) Mg(s)+2HCl(aq)\rightarrow MgCl_2(s)+H_2(g)

This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.

Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.

Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.

In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).

Hence, the correct option is, (D)

7 0
4 years ago
PLEASEEEEEE HELPPPP???
Elenna [48]
1. c
2. a
3. a
(I’m not 100% but 2 & 3 couldn’t be transform)
4 0
3 years ago
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