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KonstantinChe [14]
3 years ago
5

The minimum amount of energy that particles must have in order to react is known as the... what?

Chemistry
1 answer:
Anika [276]3 years ago
4 0
Activation energy

Hope this helps
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A cold object will have_ kinetic energy which means _ faster moving particles
qwelly [4]

Answer: if this is true or false, then this is false, something that is cold has slow moving particles, fast moving ones generate heat which will make it warm, this object has potential energy not kinetic.

5 0
3 years ago
An object has a density of 1.8 g/mL and a mass of 14 g. What is the volume of the object
lesya692 [45]

Answer:

0.13 cm^3

Explanation:

Volume = Mass/ density

1.8 g/ml / 14g = 0.128571429

Both numbers have 2 significant digits.

With that, the answer rounds to 0.13

The final answer is 0.13 cm(don't forget the units for volume)

Hope it helped!

4 0
3 years ago
2Pb(s) + O2(aq) + 4H+(aq) → 2H2O(l) + 2Pb2+(aq)
defon

Answer:

The answer to your question is 0.269 g of Pb

Explanation:

Data

Lead solution = 0.000013 M

Volume = 100 L

mass = 0.269 g

atomic mass Pb = 207.2 g

Chemical reaction

                        2Pb(s) + O₂(aq) + 4H⁺(aq) → 2H₂O(l) + 2Pb₂⁺(aq)

Process

1.- Calculate the mass of Pb in solution

Formula

Molarity = \frac{number of moles}{volume}

Solve for number of moles

Number of moles = Volume x Molarity

Substitution

Number of moles = 100 x 0.000013

Number of moles = 0.0013

2.- Calculate the mass of Pb formed.

                       207.2 g of Pb ----------------- 1 mol

                             x g             ----------------- 0.0013 moles

                        x = (0.0013 x 207.2) / 1

                        x = 0.269 g of Pb                                                                

8 0
3 years ago
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A chemical reaction that absorbs energy in the form of heat is described as
adell [148]
<span> endothermic is the answer


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8 0
3 years ago
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Which type of energy is released in chemical reactions?
Elena-2011 [213]
Chemical energy is released 
3 0
3 years ago
Read 2 more answers
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