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Scorpion4ik [409]
3 years ago
8

The graph shows the gravitational potential energy of a radio controlled toy helicopter.describe the motion of the toy

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
6 0
Gravitational potential energy is observed when an object is not in rest or is in motion. In this case, the helicopter is in motion where the direction is going upward with a negative potential energy. Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
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What is an oxidation reaction? ​
kow [346]
<h3>Definition:</h3>
  • A reaction when an atom or compound loses one or more electrons.

  • It is a reaction is a type of chemical reaction that involves a transfer of electrons between two species.

  • Oxidation is gain of oxygen

<h3>For Example:</h3>

Fe + O2 —(H2O)—> Fe2O3

7 0
3 years ago
According to the law of conservation of matter, which statement about chemical reactions is true?
Yanka [14]

Atoms cannot be created or destroyed by chemical reactions. They just have a some bonds rearranged is all.


3 0
3 years ago
When 4.5 mol al react with 11.5 mol hcl, what is the limiting reactant, and how many moles of h2 can be formed?
ahrayia [7]
1°/ . 2 Al + 6 HCl → 2 AlCl3 + 3 H2 

<span>k1 = n(Al) / 2 = 4,5 / 2 = 2,25 </span>
<span>k2 = n(HCl) / 6 = 11,5 / 6= 1,92 </span>

<span>k2 < k1 ==> HCl is the limiting reactant </span>

<span>6 mol of HCl ---> 2 mol of H2 </span>
<span>11,5 mol of HCl ---> 3,83 mol of H2 </span>
5 0
3 years ago
An element has the mass number 12 and atomic number 6. The number of neutron in it is?
slamgirl [31]

Answer:

12-6=6

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8 0
3 years ago
Standard reduction potentials for nickel(II) and copper(II) The standard reduction potential for a substance indicates how readi
AleksandrR [38]

Answer:

The standard potential, E cell, for this galvanic cell is 0.5670V

Explanation:

Ni²⁺(aq)  +  2e⁻   →   Ni(s)           E red =  - 0.23V      ANODE

Cu²⁺(aq) +  2e-    →  Cu(s)          E red = + 0.337V    CATHODE

ΔE° = E cathode - E anode

ΔE° = 0.337V - (0.23V) = 0.5670 V

6 0
3 years ago
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