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3 years ago

BRAINLIESTT ASAP!! PLEASE HELP ME :)

Chemistry

1 answer:

AURORKA [14]3 years ago

8 0

Answer:

Here's what I get.

Explanation:

Mg + 2HCl ⟶ MgCl₂ + H₂

According to the Law of Conservation of Mass, the total mass of the products must equal the total mass of the reactants.

However, one of the products is a gas, hydrogen. The gas escapes into the atmosphere, so you will not be weighing it at the end of the reaction.

The mass of the test tube and contents after the reaction will be less than before the reaction.

However, that doesn't violate the Law of Conservation of Mass. You just didn't measure the mass of all the products.

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Will give brainliest this is simple plz help

julsineya [31]

Answer:

IIron is the 26th element on the periodic table. It is located in period 4 and group 8. And for the properties, iron, like other metals, conducts heat and electricity, has a luster, and forms positive ions in its chemical reactions. Pure iron is fairly soft and can easily be shaped and formed when hot. Its color is silvery white. Iron is easily magnetized.

Explanation:

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2 years ago

If a hydrogen atom and a helium atom have the same kinetic energy:________

Nuetrik [128]

Answer: If a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

Explanation:

The relation between energy and wavelength is as follows.

$E = \frac{hc}{\lambda}\\$

This means that energy is inversely proportional to wavelength.

As it is given that energy of a hydrogen atom and a helium atom is same.

Let us assume that $E_{hydrogen} = E_{helium} = E'$ . Hence, relation between their wavelengths will be calculated as follows.

$E_{hydrogen} = \frac{hc}{\lambda_{hydrogen}}$ ... (1)

$E_{helium} = \frac{hc}{\lambda_{helium}}$ ... (2)

Equating the equations (1) and (2) as follows.

$E_{hydrogen} = E_{helium} = E'\\\frac{hc}{\lambda_{hydrogen}} = \frac{hc}{\lambda_{helium}} = E'\\\lambda_{helium} = \lambda_{hydrogen} = E'$

Thus, we can conclude that if a hydrogen atom and a helium atom have the same kinetic energy then the wavelength of the hydrogen atom will be roughly equal to the wavelength of the helium atom.

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2 years ago

Using this illustration, what is the chemical formula? Picture and possible answers are below.

qwelly [4]

NH3. 1 nitrogen and 3 hydrogen

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2 years ago

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Explain how a photosystem converts light energy to chemical energy steps

const2013 [10]

Light energy is turned into chemical energy when <span>when a photochemically excited special chlorophyll molecule of the photosynthetic reaction center loses an electron, undergoing an oxidation reaction.

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3 years ago

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snow_lady [41]

Because there to tiny to see

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2 years ago