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elena-s [515]
3 years ago
9

Describe one advantage and one disadvantage of replacing standard bulbs with led lighting

Chemistry
1 answer:
Leno4ka [110]3 years ago
7 0
Advantages

less wasted energy

Reduces fossilisation

Disadvantages

- Expensive

- doesn't look nice ( apparently)



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When substances are formed that are different from the starting substances, a physical change has occurred. True False
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False, because physical change does not involve the formation of substances. An example of physical change is change of state e.g water freezing .It is still water if you were to melt it.
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Criteria and constraints help determine which solutions will be applied when extracting materials from pomace in which way
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The use of pomace for animal feed might be chosen if minimizing production costs is desired

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A solute is a strong electrolyte that ionizes into 2 ions. What is the molar mass of this solute if 30.76 grams added to exactly
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Answer:

34.9 g/mol is the molar mass for this solute

Explanation:

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For example: AB ⇒ A⁺  +  B⁻

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0.899°C / 0.511 m/°C . 2 = m → 0.879 molal

This moles corresponds to 1 kg of solvent. Let's determine the molar mass

Molar mass (g/mol) → 30.76 g / 0.879 mol = 34.9 g/mol

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What is the lon # for Beryllium (Be)?
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