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raketka [301]
3 years ago
10

What is a basic metric unit of a liquid volume

Chemistry
2 answers:
RSB [31]3 years ago
8 0
Liter is a metric unit for liquid volume
Luba_88 [7]3 years ago
4 0
Liter/ milliliter would be the basic unit of a liquid volume
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Consider the following equation for the combustion of acetone (C3H6O), the main ingredient in nail polish remover.
solong [7]

Answer:

a) 4869 kj will be released

b) 43.86 g of octane

Explanation:

The heat of combustion is the amount of heat released when one mole of a substance reacts with enough oxygen

since the heat of combustion is per mol of combustible substancewjat we are required to do in this problem is calculate number moles in the reactions although in a different manner

a) MW C3H6O = 158 g/ mol

mol C3H6O = 158 g × 1 mol/ 58.08 g

= 2.72 - 1790 kj / mol ×2.72 mol = 4869 kj

b) Here we are asked the mass of octane to produce 1950 kj of heat knowing that per mole of octane we get 5074.1 kj then

1 mol / 5074.1kj × 1950 kj= 0.384 mol

mass C8H18 = 0.384 mol × 114.23 g/ mol = 43.86 g

4 0
3 years ago
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What element is represented by the following electron configuration:
Alecsey [184]
For better representation, let me rewrite the electronic configuration:

<span>1s</span>²<span>2s</span>²<span>2p</span>⁶<span>3s</span>²<span>3p</span>⁶<span>4s</span>²<span>3d</span>⁴

The exponents represent the number of electrons in the designated subshell. Thus, the total number of electrons are:
# of electrons = 2+2+6+2+6+2+4 = 24

Assuming this is in neutral state, the element with an atomic number of 24 is Chromium. Thus, the answer is Cr.
6 0
3 years ago
Why is burning wood considered a chemical change instead of a physical change? (Evidence pleaseee)
Mademuasel [1]

Burning wood is a chemical change and not a physical change because the carbon reacts with the oxygen, and that creates ash and smoke, you cannot undo ash and smoke, so therefore, it's only a chemical change


3 0
4 years ago
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How many pencils are in 20 OWLS
AVprozaik [17]
Owls means a mammalian species
It is incorrect question
4 0
4 years ago
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How do protons in the nucleus behave?
IRISSAK [1]

Answer:

Protons and neutrons are made up of smaller subatomic particles. When protons or neutrons get close enough to each other, they exchange particles (mesons), binding them together. Once they are bound, it takes considerable energy to break them apart.

7 0
3 years ago
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