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3 years ago

Explained how natural factors have changed the surface and atmosphere of the Earth over time?

Chemistry

1 answer:

Ne4ueva [31]3 years ago

8 0

Answer:

The earth's climate is influenced and changed through natural causes like volcanic eruptions, ocean currents, the Earth's orbital changes, solar variations and internal variability. is short-term cooling. Volcanic eruptions pump out clouds of dust and ash, which block out some sunlight.

Explanation:

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What is the mass of 4.40 moles of magnesium chloride, MgCl2?

Darya [45]

Since the number of moles of a substance is the mass divided by the molar mass of the substance, we can just simply multiply the molar mass of magnesium chloride by the number of moles, which is 4.40 in this case.

To find the molar mass, refer to the periodic table for the relative atomic mass of Mg and Cl and add them together. Since there’s 2 chloride ions in MgCl2, double the relative atomic mass of Cl when adding.

24.31 + 35.45x2
=95.21

Now just multiply 95.21 to 4.40mol, which you’ll get 418.9g (corrected to 3 significant figures)

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3 years ago

Una teoría puede estar respaldada por pruebas considerables.?????

AlladinOne [14]

Respuesta:

Yes.

Explicación:

Las teorías se pueden mejorar o modificar a medida que se recopila más información para que la precisión de la predicción sea mayor con el tiempo.

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3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

bogdanovich [222]

2CH4+O2-> 2CH3OH

A combustion reaction involves only hydrogen, carbon, and oxygen where O2 is always a reactant. So, the only one possible is the one stated above.

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3 years ago

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Calculate the number of moles of iron that are contained in 2.89x10^ 25 atoms of iron

andreev551 [17]

It’s gonna be 2.3 of iron

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3 years ago

Calculate the equilibrium constant for the reaction below given that [Cl2] = 0.37 M, [H2] = 0.27 M, and [HCl] = 0.95 M at equili

cluponka [151]

Answer:

The equilibrium constant is 9.034.

Explanation:

Every reversible chemical reaction, as in this case, occurs in both directions: the reagents are transformed into products (direct reaction) and the products are transformed back into reagents ( reverse reaction).

The general way in which a reversible reaction can be written is:

aA + bB ⇔ cC + dD

where A, B, C and D represent the chemical species involved and a, b, c and d their respective stoichiometric coefficients.

The chemical equilibrium is the state in which the direct and indirect reaction have the same reaction rate, and is expressed by a constant Kc. This constant is defined as:

$Kc=\frac{[A]^{a}*[B]^{b} }{[C]^{c} *[D]^{d} }$

This constant is equal to the multiplication of the concentrations of the products elevated to their stoichiometric coefficients divided the multiplication of the concentrations of the reactants elevated to their stoichiometric coefficients. In Kc only gases and aqueous solutions come into play and only depends on the temperature.

You have the reaction:

Cl₂(g) + H₂(g) ⇌ 2 HCl(g)

So, in this case, the constant Kc is:

$Kc=\frac{[HCl]^{2} }{[Cl_{2} ]*[H_{2}] }$

Then:

$Kc=\frac{(0.95 M)^{2} }{0.37 M*0.27 M}$

Kc= 9.034

<u><em>The equilibrium constant is 9.034.</em></u>

7 0

3 years ago