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vaieri [72.5K]
3 years ago
7

Help 4 me???? ples????

Chemistry
2 answers:
Ainat [17]3 years ago
4 0
I think it’s the second one
frutty [35]3 years ago
3 0

Answer:

its the first one.

Explanation:

If sodium loses an electron, it now has 11 protons, 11 neutrons, and only 10 electrons, leaving it with an overall charge of +1

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While in Europe, if you drive 107km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter
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7 0
3 years ago
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A bob of mass of 0.18 kilograms is released from a height of 45 meters above the ground level. What is the value of the kinetic
Drupady [299]

We can assume that all<span> gravitational potential energy is converted into kinetic energy of the object.</span><span>

<span>Hence, </span>GPE = KE

Where GPE is gravitational Potential Energy (J) and KE is Kinetic Energy (J)

GPE = mgh

<span>Where, m is the mass of the object (kg), g is acceleration due to gravity (9.8 m s</span></span>⁻<span>²) and h is the height to the<span> object from ground (m).</span></span><span>

m = 0.18 kg
g = 9.8 m s</span>⁻²<span>
h = 45 m

Hence, 
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<span>Hence, </span>KE = GPE = 79 J

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A student decomposed 3.67g of copper (ii) hydroxide into copper (ii) oxide. how many ml of 3m h2so4 is need to react with all th
vredina [299]
In the presence of heat, copper (II) hydroxide decomposes in to copper (II) oxide. 
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upon decomposition, water is removed from Cu(OH)₂
the amount of Cu(OH)₂ decomposed - 3.67 g
number of moles of Cu(OH)₂  - 3.67 g / 97.5 g/mol = 0.038 mol
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the molarity of H₂SO₄ is 3M
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6 0
4 years ago
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