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MA_775_DIABLO [31]
4 years ago
14

What principle do we use in writing the formula of an ionic compound such as NaCl or MgI2? How do we know that two iodide ions a

re needed for each magnesium ion, whereas only one chloride ion is needed per sodium ion?
Chemistry
1 answer:
Savatey [412]4 years ago
6 0

Answer:

We know based on the charges of each ion and the fact that they must always sum to 0

Explanation:

Na only has one outer electon to give so it is always +1

Mg has two outer electrons so it always gets +2

Halogens have one "missing" electron in their outer shell so they get a -1

For NaCl  (+1) + (-1) = 0

For MgI2 (+2) + 2(-1) = 0

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3. According to Newton's First Law of Motion, what does an object at rest do?
Taya2010 [7]

Answer:

stays at rest

Explanation:

7 0
3 years ago
4. How many grams of ammonium carbonate are needed to decompose in order to produce
Thepotemich [5.8K]

Answer:

14.23g of (NH4)2CO3

Explanation:

We'll begin by writing the balanced equation for the reaction.

(NH4)2CO3 –> (NH4)2O + CO2

Next,, we shall determine the mass of (NH4)2CO3 that decomposed and the mass of CO2 produced from the balanced equation. This is illustrated below:

Molar mass of (NH4)2CO3 = 2[14+(4x1)] + 12 + (16x3)

= 2[14 +4] + 12 + 48

= 2[18] + 60 = 96g/mol

Mass of (NH4)2CO3 from the balanced equation = 1 x 96 = 96g

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Mass of CO2 from the balanced equation = 1 x 44 = 44g.

Summary:

From the balanced equation above,

96g of (NH4)2CO3 decomposed to produce 44g of CO2.

Finally, we can determine the mass of (NH4)2CO3 that decomposed to produce 6.52g of CO2 as follow:

From the balanced equation above,

96g of (NH4)2CO3 decomposed to produce 44g of CO2.

Therefore, Xg of (NH4)2CO3 will decompose to produce 6.52g of CO2 i.e

Xg of (NH4)2CO3 = (96 x 6.52)/44

Xg of (NH4)2CO3 = 14.23g

Therefore, 14.23g of (NH4)2CO3 is needed to produce 6.52g of CO2.

4 0
3 years ago
After reading the list of physical properties above, you realize that they are describing a substance that is a
Alecsey [184]

The answer is B

Hope this helps!

5 0
3 years ago
Can y'all help me with number 4
astraxan [27]
I think the answer is A but i'm not sure
6 0
4 years ago
Read 2 more answers
What are geometric isomers?
alexandr402 [8]
Geometric isomers is defined as "each of two or more compounds that differ from each other in the arrangement of groups with respect to a double bond, ring, or other rigid structure."

I hope this answer helped you! If you have any further questions or concerns, feel free to ask! :)
7 0
3 years ago
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