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3 years ago

What is the definition of weight

2 answers:

7 0

Answer: Can you be a little more specific Like atomic weight or molecular weight ? I have taken Ap Chemistry so I know its not easy but if you can specify I may be able to help you.

Explanation:

emmasim [6.3K]3 years ago

6 0

Answer: The force with which an object near the Earth or another celestial body is attracted toward the center of the body by gravity. An object's weight depends on its mass and the strength of the gravitational pull.

Explanation: just tell me if you need another definition

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A molecule that oxidized gains electrons and energy. true or false

quester [9]

I suppose it false, since the oxidation involves the loss or removal of the electrons such forth it does not gain electrons.

5 0

4 years ago

The amount of heat involved in the synthesis of 1 mole of a compound from its elements, with all substances in their standard st

Pachacha [2.7K]

Answer:

Explanation:

8 0

4 years ago

Read 2 more answers

1. Which of the following is a correctly written thermochemical equation?

WITCHER [35]

Explanation:

1. Thermochemical equation is balance stoichiometric chemical equation written with the phases of the reactants and products in the brackets along with the enthalpy change of the reaction.

The given correct thermochemical reactions are:

$Fe(s)+O_2(g)\rightarrow Fe_2O_3(s),\Delta H = 3,926 kJ
$

$C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2 (g)+4H_2O(l),\Delta H= 2,220 kJ/mol$

2. Phase change affect the value of the enthalpy change of the thermochemical equation. This is because change in phase is accompanied by change in energy. For example:

$H_2O(s)\rightarrow H_2O(g),\Delta H_{s}=51.1 kJ/mol$

$H_2O(l)\rightarrow H_2O(g),\Delta H_{v}=40.65 kJ/mol$

In both reaction phase of water is changing with change in energy of enthalpy of reaction.

7 0

3 years ago

Read 2 more answers

CORRECT ANSWER GETS BRAINLIST

pashok25 [27]

Answer:

B. halocline

Explanation:

it is a zone in the oceanic water that changes depending on the depth

Hope This Helped Sorry If Wrong

6 0

2 years ago

For the reaction a2 + b2 → 2ab, ea(fwd) = 105 kj/mol and ea(rev) = 77 kj/mol. assuming the reaction occurs in one step, calculat

Lady bird [3.3K]

Answer is: 28 kJ.
Chemical reaction: A₂ + B₂ ⇄ 2AB.
Ea(forward) = 105 kJ/mol.
Ea(reverse) = 77 kJ/mol.
ΔH(reaction) = ?
<span>The enthalpy change of reaction is the change in the energy of the reactants to the products.
</span>ΔH(reaction) = Ea(forward) - Ea(reverse).
ΔH(reaction) = 105 kJ/mol - 77 kJ/mol.
ΔH(reaction) = 28 kJ/mol; this is endothermic reaction (ΔH <span>> 0).</span>

6 0

3 years ago