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ololo11 [35]
3 years ago
14

Choose all the answers that apply.

Chemistry
1 answer:
melamori03 [73]3 years ago
4 0

Electrons have a negative charge and orbit around the nucleus, while protons have a positive charge and are found in the nucleus. Neutrons have no charge and are also found in the nucleus with protons.

I hope this helps! If you have any doubts, feel free to ask.

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How many moles would be in 85.OmL of 0.750M KOH?
Harlamova29_29 [7]

Answer: There are 0.0637 moles present in 85.0 mL of 0.750 M KOH.

Explanation:

Given: Volume = 85.0 mL (1 mL = 0.001 L) = 0.085 L

Molarity = 0.750 M

It is known that molarity is the number of moles of solute present in liter of a solution.

Therefore, moles present in given solution are calculated as follows.

Molarity = \frac{moles}{Volume (in L)}\\0.750 M = \frac{moles}{0.085 L}\\moles = 0.0637 mol

Thus, we can conclude that there are 0.0637 moles present in 85.0 mL of 0.750 M KOH.

7 0
3 years ago
What has less energy than visible light in the electromagnetic spectrum?
QveST [7]
Infrared waves, micro waves, radio waves because they are weaker.
3 0
3 years ago
For a particular reaction, Δ=−111.4 kJ and Δ=−25.0 J/K.
vichka [17]

Answer:

\Delta G =-103.95kJ

Explanation:

Hello there!

In this case, since the thermodynamic definition of the Gibbs free energy for a change process is:

\Delta G =\Delta H-T\Delta S

It is possible to plug in the given H, T and S with consistent units, to obtain the correct G as shown below:

\Delta G =-111.4kJ-(298K)(-25.0\frac{J}{K}*\frac{1kJ}{1000J} )\\\\\Delta G =-103.95kJ

Best regards!

6 0
3 years ago
A 2.0-liter volume of hydrogen gas combined with 1.0 liter of oxygen gas to produce 2.0 liters of water vapor. Does oxygen uderg
lidiya [134]
Oxygen undergoes a chemical change
8 0
4 years ago
If dissolving carbon dioxide in water to form carbonic acid is the forward reaction, what is the reverse reaction that balances
kenny6666 [7]

Answer:

H_2CO_3\rightleftharpoons H_2O + CO_2

Explanation:

When carbon dioxide dissolves and reacts with water, the water and the gaseous  $CO_2$   reacts to form a dilute mixture solution of $H_2CO_3$ (carbonic acid ).

The reaction is   H_2O + CO_2\rightleftharpoons H_2CO_3

This is a forward reaction.  And the symbol   $ \rightleftharpoons $  shows that the reaction can be reversible. It means that the reaction can be carried in forward direction as well as in the backward direction.

The reaction attains chemical equilibrium until the reactants and the products no longer changes with time.  

The carbonic acid can also dissociates into carbon dioxide and water in the backward direction.

H_2CO_3\rightleftharpoons H_2O + CO_2

6 0
4 years ago
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