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rewona [7]
3 years ago
13

Mark all of the objects that can be found in our Solar System

Chemistry
1 answer:
STALIN [3.7K]3 years ago
4 0

Answer:

major planets ,asteroids, nebula and dust

You might be interested in
A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?
serious [3.7K]
An isotope of carbon always has 6 protons - that is the part of the atom which shows it is carbon. If it had a different number of protons, it would be a different element altogether

4 0
3 years ago
Read 2 more answers
Calculate the standard free energy change for the combustion of one mole of methane using the values for standard free energies
Irina-Kira [14]

Answer:

The standard free energy of combustion of 1 mole of methane = -801.11 kJ

The negative sign shows that this reaction is spontaneous under standard conditions.

The negative sign on the standard free energy also means this combustion reaction is product-favoured at equilibrium.

Explanation:

The chemical reaction for the combustion of methane is given by

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

The standard free energy of formation for the reactants and products as obtained from literature include

For CH₄, ΔG⁰ = -50.50 kJ/mol

For O₂, ΔG⁰ = 0 kJ/mol

For CO₂, ΔG⁰ = -394.39 kJ/mol

For H₂O(g), ΔG⁰ = -228.61 kJ/mol

ΔG(combustion) = ΔG(products) - ΔG(reactants)

ΔG(products) = (1×-394.39) + (2×-228.61) = -851.61 kJ/mol

ΔG(reactants) = (1×-50.50) + (2×0) = -50.50 kJ/mol

ΔG(combustion) = ΔG(products) - ΔG(reactants)

ΔG(combustion) = -851.61 - (-50.5) = -801.11 kJ/mol

Since we're calculating for 1 mole of methane, ΔG(combustion) = -801.11 kJ

- A negative sign on the standard free energy means that the reaction is spontaneous under standard conditions.

- A positive sign indicates a non-spontaneous reaction.

- A Gibb's free energy of 0 indicates that the reaction is at equilibrium.

- A negative sign on the standard free energy also means that if the reaction reaches equilibrium, it will be product favoured.

- A positive sign on the standard free energy means that the reaction is reactant-favoured at equilibrium.

Hope this Helps!!!

4 0
3 years ago
I need to know the measurements of this to the appropriate amount of significant figures
Vesnalui [34]

Answer:

[See Below]

Explanation:

140 ml.

3 0
3 years ago
the _ of an element is the average mass of an element naturally occurring atom, or isotopes,taking into account the _ of each is
NARA [144]

Answer:

the<u> atomic mass</u> of an element is the average mass of an element naturally occurring atom, or isotopes, taking into account the <u>percentage</u> of each isotopes​

Explanation:

The atomic mass of an element is obtained by obtaining the relative abundances (in percentages) of naturally occurring atoms and the masses of the isotopes. The atomic mass can also be defined as the sum of the protons and the neutrons in the nucleus of an element.

In the periodic table, the atomic mass is indicated below the symbol of each of the elements and is usually in the decimal form.

7 0
3 years ago
When 100ml of M HCl is mixed with 100ml of N NaOH, the pH of the resulting solution is
RoseWind [281]

Answer:

Option d. 7

Explanation:

A mixture of a strong base and a strong acid produce a neutral salt and water.

This is the reaction of neutralization:

HCl + NaOH → NaCl + H₂O

NaCl →  Na⁺  +  Cl⁻

Sodium chloride is neutral salt which does not give H⁻ neither OH⁻ to medium, that's why pH is neutral.

Both ions are derivated from a strong acid and base so they do not make hydrolisis. They are a conjugate pair of a weak acid and base. The reactions can not occur:

Cl⁻  +  H₂O ← OH⁻  +  HCl

Na⁺  +  H₃O⁺ ← NaOH  + H₂O

4 0
3 years ago
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