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Shalnov [3]
3 years ago
13

What mass of Na2SO4 is needed to make 2.0 L of 3.0 M solution (Na = 23 g; S = 32 g; O = 16 g)

Chemistry
1 answer:
julia-pushkina [17]3 years ago
3 0

Answer: 710.5g

Explanation:

Moles of Na2SO4 = conc. x volume(dm3)

= 2 x (2500cm3/1000)

= 5 mol

Mass of Na2SO4 = moles x molar mass

= 5 x ((23 x 2) + 32.1 + (16 x 4))

= 710.5g

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Which of the following solutions contains the largest number of moles of dissolved particles? a.) 25 ml of sodium chloride b.) 2
kirza4 [7]

Answer:

b.) 25 ml of aluminum hydroxide

Explanation:

For this question, we have to assume that we have the <u>same concentration</u> for all the solutions, for example, <u>1 M</u>. Additionally, we have to take into account the <u>ionization reaction</u> for each species:

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b) Al(OH)_3~->~Al^+^3~+~3OH^- <u>we have fourth ions</u>

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d) C_6H_1_2O_6~->~C_6H_1_2O_6  <u>we have one ion</u>

If we have the same volume and the same concentration the variables that will help us to answer the question would be the n<u>umber of ions.</u> If we have <u>more ions we will have more particles dissolved</u>. Therefore the answer would be b) (<u>due to the fourth ions</u>).

I hope it helps

5 0
3 years ago
Read 2 more answers
Please respond guys I’ll give brainliest and 100 points
Contact [7]

Answer:

Name

Atomic Number

Atomic Symbol

Atomic Weight

Phase

Color

Classification

Group in Periodic Table

Group Name

Period in Periodic Table

Block in Periodic Table

Electronic Configuration

Melting Point

Boiling Point

Electronic Shell Structure

CAS Number

Neighborhood Elements

Lithium

3

Li

6.941

Solid

Silver

alkali metal

1

lithium family  

2

s

[He] 2s1

180.54 °C

1342 °C

2, 1

CAS7439-93-2

Neighborhood Elements of Lithium

Cesium

55

Cs

132.90545

Solid

Silver

alkali metal

1

lithium family  

6

s

[Xe] 6s1

28.44 °C

671 °C

2, 8, 18, 18, 8, 1

CAS7440-46-2

Neighborhood Elements of Cesium

Explanation:

4 0
3 years ago
| | | |<br> | | | |<br> | | | |<br> VVV
zubka84 [21]

Answer:the answer would be a because that's what it would talk about and is the correct answer

Explanation:yes it is correct just answer it trust me

7 0
4 years ago
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