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finlep [7]
3 years ago
5

Why is sodium chloride soluble in water​

Chemistry
1 answer:
lisov135 [29]3 years ago
5 0

Answer: because the very polar water molecules attract both the positively charged sodium ions and the negatively charged chloride ions.

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What is the mass of a sample containing 8.53×10 to the 24th power formula units of magnesium phosphate?
Archy [21]

Answer:

Mass = 3732.62 g

Explanation:

Given data:

Number of formula units = 8.53×10²⁴

Mass of sample = ?

Solution:

1 mole of any substance contain 6.022×10²³ formula units.

8.53×10²⁴ formula units ×1 mol / 6.022×10²³ formula units

1.42×10¹ mol

14.2 mol

Mass of magnesium phosphate:

Mass = number of moles × molar mass

Mass = 14.2 mol × 262.86 g/mol

Mass = 3732.62 g

5 0
4 years ago
Read the Safety Data Sheet of hydrogen peroxide to identify the recommended way to store this substance. Choose one:_______.
Lena [83]

Answer:

The correct option is C.

In a tightly closed container in a dry and well-ventilated place

Explanation:

Hydrogen peroxide should be store in a tight closed container and ventilated area because it is an oxidizing agent and it's has oxidizing characteristics. If to is exposed or the bottle lid is broken and exposed it can react and liberate oxygen and heat. It can react with the air and chemical it is exposed with. This will make it to be less effective and there will be a change in it's composition.

5 0
3 years ago
What structure helps the earthworm form cocoons
vodka [1.7K]
Go to this website it will help you alot 
http://cocoon.org/earthworm-cocoon/
hope it helps
:)
7 0
3 years ago
Which is and element <br> A) Salad<br> B) Sugar<br> C) Water <br> D) Potassium
Semenov [28]

Answer:

the only element above is potassium

3 0
4 years ago
A human lung at maximum capacity has a volume of 3.0 liters. If the partial pressure of oxygen in the air is 21.1 kilopascals an
Juliette [100K]

V = maximum capacity of human lung = 3 liter = 3 x 0.001 m³ = 0.003 m³      (Since 1 liter = 0.001 m³)

P = pressure of oxygen = 21.1 kilo pascal = 21.1 x 1000 = 21100 Pa      (since 1 kilo = 1000)

T = temperature of air = 295 K

n = number of moles of oxygen

Using the ideal gas equation

PV = n RT

inserting the above values in the equation

(21100) (0.003) = n (8.314) (295)

n = 0.026 moles



4 0
3 years ago
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