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1. How many negative ones (-1) would you need to balance out one positive 2 (+2)?

Question options:

Two negative ones balance out two positive twos

One negative one balances out one positive two

Two negative ones balance out one positive two

One negative one balances out two positive twos


2. Potassium forms ions with a charge of +1 (Ka+). Iodine forms ions with a charge of -1. Selenium forms ions with a charge of -2 (Se2-).

Imagine that Potassium ions and Selenide ions combine to form Potassium Selenide. What numbers would be in the place of X and Y in:

KXSeY

(Use the number 1 even if it isn't strictly necessary)

X=______ Y =______


3. You are balancing an ionic compound. Let's call it: AB.

Ion A has a charge of +2 and Ion B has a charge of -3.

Therefore, you determine that the ionic compound (AB) will have a ratio of 3 As for every 2 Bs.

How would you modify AB in order to show that they have this 3-to-2 ratio?

Question options:

3A2B

A3B2

A3B2


4. Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1.

Which of the following would represent an ionic compound composed of Calcium and Iodide ions?

Question options:

CaI2

CaI

Ca2I

Ca2I

2CaI

CaI2

Respuesta :

neednofraud

I just took the test, the correct answers are ...

1. Two negative ones balance out one positive two.

2. X = 2, Y = 1

3. A₃B₂

4. Cal₂

1) The number of negative ones (-1) would you need to balance out one positive 2 (+2) is;

Option C; Two negative ones balance out one positive two

2) The numbers that would be in the place of X and Y in   [tex]K_{X}Se_{Y}[/tex] is;

X = 2 and Y = 1

3) AB will be modified in order to show that they have this 3-to-2 ratio as;

Option B; A₃B₂.

4) The formula that will represent an ionic compound composed of Calcium and Iodide ions is; Option A; CaI₂

1) To balance out the ions, it means addition of them should be equal to zero. Thus, to balance out one positive two (+2) with negative 1 (-1), the expression is;

+2 + x(-1) = 0

2 - x = 0

x = 2

Thus, we need 2 negative ones to balance out one positive two.

2) We are told that potassium(K) forms ions with a charge of +1 and selenium (Se) forms ions with a charge of -2.

When two ions combine, the product element will have its'  subscript as the absolute value of the ion of its' sharing ion. Thus;

We will have; K₂Se₁

Comparing with [tex]K_{X}Se_{Y}[/tex], then; X = 2 and Y = 1

3) We are told that;

Ion A has a charge of +2 and Ion B has a charge of -3.

From the concept in answer 2 above, it means that the answer will be;

A₃B₂.

4) We are told that;

Calcium forms ions with a charge of +2. Iodine forms ions with a charge of -1. An ionic compound formed by both ions using the concept earlier used would give us; CaI₂

Read more at; https://brainly.com/question/13958302

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