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zepelin [54]
3 years ago
7

In what ways is the reaction between calcium and water different than the reactions between sodium and water, and potassium and

water?
Chemistry
1 answer:
adoni [48]3 years ago
5 0

Answer:

esta con's para 15, tu the diamatera' la 24 equlia 5<4 ponte 50

Explanation:

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Sort the metric system prefixes into the correct order, smallest to largest.
AleksAgata [21]

Answer:

mili

hecto

deci

deca

centi

kilo

Explanation:

7 0
3 years ago
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Why is Co2 called a greenhouse gas
rodikova [14]

Answer:

greenhouse effect

Explanation:

hoped this helped

3 0
4 years ago
A student mixes baking soda and vinegar in a glass. Do you think any new substances are being created in this mixture? If so, ho
Harrizon [31]

Answer:

A student mixes baking soda and vinegar in a glass. ... Yes I do belive that new substances are being formed because there is a chemical reaction between the baking soda and vinegar turning it into a bubbly substances instead of a powder and liquid.

Explanation:

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3 years ago
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What is the electron configuration for iodine
iogann1982 [59]

Hello!

To find electron configuration for Idoine we need to understand the following steps:

  1. Finding the Atom's Atomic Number (tells us the specific number of electrons)
  2. Determining the Charge of the Atom
  3. Understanding the orbitals (Set S [Contains 2], P [Contains 3, Holds 6], D [Contains 5, Holds 10], F [Contains 7, Holds 14], and there are some theoritical ones.) [Overall the sets go SPDFGHIK
  4. Understanding notations in configuartion. The notations display the number of electrons in the atom and set.

In this case, for Iodine. If we follow these rules we can see that the electron configuration is [Kr] 4d^10 5s^2 5p^5. We use Krytpon in front because that is the last full and stable noble gas before this particular element. Atoms are just trying to be stable so the goal is to achieve that full shell.

7 0
3 years ago
What is the pH of a solution with a 4.60 × 10−4 M hydroxide ion concentration?
guapka [62]

Answer:

pH

=

10.66

Explanation:

For pure water at  

25

∘

C

, the concentration of hydronium ions,  

H

3

O

+

, is equal to the concentration of hydroxide ions,  

OH

−

.

More specifically, water undergoes a self-ionization reaction that results in the formation of equal concentrations of hydronium and hydroxide anions.

2

H

2

O

(l]

⇌

H

3

O

+

(aq]

+

OH

−

(aq]

At room temperature, the self-ionization constant of water is equal to

K

W

=

[

H

3

O

+

]

⋅

[

OH

−

]

=

10

−

14

This means that neutral water at this temperature will have

[

H

3

O

+

]

=

[

OH

−

]

=

10

−

7

M

As you know, pH and pOH are defined as

pH

=

−

log

(

[

H

3

O

+

]

)

pOH

=

−

log

(

[

OH

−

]

)

and have the following relationship

pH

+

pOH

=

14

In your case, the concentration of hydroxide ions is bigger than  

10

−

7

M

, which tells you that you're dealing with a basic solution and that you can expect the pH of the water to be higher than  

7

.

A pH equal to  

7

is characteristic of a neutral aqueous solution at room temperature.

So, you can use the given concentration of hydroxide ions to determine the pOH of the solution first

pOH

=

−

log

(

4.62

⋅

10

−

4

)

=

3.34

This means that the solution's pH will be

pH

=

14

−

pOH

pH

=

14

−

3.34

=

10.66

Indeed, the pH is higher than  

7

, which confirms that you're dealing with a basic solution.

4 0
4 years ago
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