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yanalaym [24]
3 years ago
13

Which statement best describes electrons?(1) They are positive subatomic particles and are found in the nucleus.(2) They are pos

itive subatomic particles and are found surroundingthe nucleus.(3) They are negative subatomic particles and are found in thenucleus.(4) They are negative subatomic particles and are found surrounding the nucleus.
Chemistry
1 answer:
Anton [14]3 years ago
6 0
The answer should be (4) they are negative subatomic particles and are found surrounding the nucleus. The nucleus is formed by neutrons and protons. Neutrons are neutral and protons are positive.
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the specific heat of aluminum is 0.897 j/g degrees celsius. if a 22.6 g sample of aluminum is heated from 25 degrees celsius to
Akimi4 [234]
4,561.245 Joules
Q = Mass x Change in Temperature x Specific Heat 
Q = 22.6 x 225 x .897

3 0
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Please help me complete the following word equations:) also write the balanced equation, full ionic equation, and net ionic equa
AVprozaik [17]

Explanation:

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When a 1.00 L sample of water from the surface of the Dead Sea (which is more than 400 meters below sea level and much saltier t
Harlamova29_29 [7]

Answer: Molarity of MgCl_2 in the original sample was 1.96M

Explanation:

Molarity is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{\text{no of moles}}{\text{Volume in L}}

{\text {moles of solute}=\frac{\text {given mass}}{\text {molar mass}}=\frac{186g}{95g/mol}=1.96

Now put all the given values in the formula of molarity, we get

Molarity=\frac{1.96}{1.00L}

Molarity=1.96mol/L

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4 0
3 years ago
2 NH3 + 3 CuO →3 Cu + N₂ + 3 H₂O
Tatiana [17]

40.1g of nitrogen gas is produced.

The equation given is

2 NH₃ + 3 CuO →3 Cu + N₂ + 3 H₂O

This equation is already balanced.

When 3 moles of CuO are consumed, 1 mole of nitrogen gas is produced.

We get 1 mole of nitrogen from 3 moles of copper oxide.

We need to find the number of moles of nitrogen gas produced when 4.3 moles of copper oxide are consumed.

4.3/3 x 1 = 1.433 mols

  • 1.433 mols of nitrogen gas are produced
  • The molar mass of nitrogen gas is 14+14 = 28g
  • The amount of nitrogen gas produced in grams is 28x1.433 = 40.1g

40.1g of nitrogen gas can be made when 4.3 moles of CuO are consumed.

Learn more about molarity here:

brainly.com/question/24305514

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5 0
1 year ago
La precipitación ácida es un agente de?
serg [7]

Answer:

acid precipitation is an agent of

Explanation:

4 0
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