A form of energy that is stored in a stretched rubber band is called

1 answer:

6 0

You input potential (stored) energy into the rubber band system when you stretched therubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy. ... When the rubber band is released, the potential energy is quickly converted to kinetic (motion) energy.

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Help with this worksheet please (24pts)

Igoryamba

Atoms that loss or gain electrons are called ions. There are two types of ions: cations and anions.
Here, 2+ represents that Calcium (Ca) should gain 2 more electrons so that its number equals to that of protons.
3- represents that Nitrogen (N) should loss 3 electrons to equivalent with the number of protons.
Here, anions are S^2-, P^3-, Se^2-, Br^-.
While cations are Cr^3+, Ag^+, Li^+, Ba^2+.
The number of protons of Magnesium (Mg) = 12
The number of nuetrons of Mg = 12
The number of electrons of Mg = 12

Hope you could get an idea from here.

Doubt clarification - use comment section.

7 0

2 years ago

_____ chemical reactions need a certain amount of activation energy to get started.

Anettt [7]

Answer:all

Explanation:

Because a reaction does not starts by itself unless some force is applied

3 0

3 years ago

Please answers the question

frozen [14]

That is correct hope that helps

8 0

3 years ago

Calculate the standard enthalpy change for the reaction at 25 ∘ C. Standard enthalpy of formation values can be found in this li

meriva

Answer:

The standard enthalpy change for the reaction at $25^{0}\textrm{C}$ is -2043.999kJ

Explanation:

Standard enthalpy change ( $\Delta H_{rxn}^{0}$ ) for the given reaction is expressed as:

$\Delta H_{rxn}^{0}=[3mol\times \Delta H_{f}^{0}(CO_{2})_{g}]+[4mol\times \Delta H_{f}^{0}(H_{2}O)_{g}]-[1mol\times \Delta H_{f}^{0}(C_{3}H_{8})_{g}]-[5mol\times \Delta H_{f}^{0}(O_{2})_{g}]$