3 years ago

Please answer these true or false questions.

1 answer:

8 0

1. False, the water being stored behind the dam has potential energy until it begins to flow through the dam (it is then converted to kinetic energy).

2. True

3. True

Hope this helped! :)

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How many valence electrons are in the outermost energy level of each of the following elements? A. Helium B. Lithium C. Nitrogen

aleksklad [387]

<span>A. Helium </span>atomic number 2
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2 years ago

What are the units of density

Nataliya [291]

Answer:

Kg/ ml

Explanation:

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2 years ago

I need help solving this for chemistry. Don’t know where to start:/

Juli2301 [7.4K]

1 electron has charge =1.602* 10⁻¹⁹ C
1 mole of electrons have 1.602* 10⁻¹⁹*6.02*10²³C = 9.64*10⁴ C/1mol

One ion Co²⁺ takes 2e⁻ to become Co⁰.
1 mol of Co²⁺ ions take 2 mole of e⁻ to become Co⁰, so
0.30 mol Co²⁺ ions take mole of 0.60 mol e⁻ to become Co⁰

9.64*10⁴(C/1mol) *0.60 (mol)≈ 5.8 *10⁴ Coulombs.
Correct answer is C

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3 years ago

Draw the structure of the neutral product formed in the reaction of dimethyl malonate and methyl vinyl ketone.

Dmitriy789 [7]

Answer:

Explanation:

The reaction between dimethyl malonate which is an active methylene group with an (∝, β-unsaturated carbonyl compound) i.e methyl vinyl ketone is known as a Micheal Addition reaction. The reaction mechanism starts with the base attack on the β-carbon to remove the acidic ∝-hydrogens and form a carbanion. The carbanion formed(enolate ion) attacks the methyl vinyl ketone(i.e. a nucleophilic attack at the β-carbon) to give a Micheal addition product, this is followed by the protonation to give the neutral product.

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2 years ago

The stability of an atom is determined by the: A strength of its gamma rays B ratio of neutrons to protons C number of electrons

Lyrx [107]

Your correct answer is (B) Ratio of neutrons to protons

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3 years ago

Read 2 more answers