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Fynjy0 [20]
3 years ago
8

If an atom gains an electron it is known as what ? And has a negative charge

Chemistry
1 answer:
bekas [8.4K]3 years ago
6 0
If an atom gains an electron and gets a negative charge because of it, it is a negatively charge ion AKA an anion.
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During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4.
Monica [59]

Answer:

0.74 grams of methane

Explanation:

The balanced equation of the combustion reaction of methane with oxygen is:

  • CH₄ + 2 O₂ → CO₂ + 2 H₂O

it is clear that 1 mol of CH₄ reacts with 2 mol of O₂.

firstly, we need to calculate the number of moles of both

for CH₄:

number of moles = mass / molar mass = (3.00 g) /  (16.00 g/mol) = 0.1875 mol.

for O₂:

number of moles = mass / molar mass = (9.00 g) /  (32.00 g/mol) = 0.2812 mol.

  • it is clear that O₂ is the limiting reactant and methane will leftover.

using cross multiplication

1 mol of  CH₄ needs → 2 mol of O₂

???  mol of  CH₄  needs → 0.2812 mol of O₂

∴ the number of mol of CH₄ needed = (0.2812 * 1) / 2 = 0.1406 mol

so 0.14 mol will react and the remaining CH₄

mol of CH₄ left over = 0.1875 -0.1406 = 0.0469 mol

now we convert moles into grams

mass of CH₄ left over = no. of mol of CH₄ left over *  molar mass

                                    = 0.0469 mol * 16 g/mol = 0.7504 g

So, the right choice is 0.74 grams of methane

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3 years ago
Which statement is true? Energy cannot be created or destroyed. Energy can be destroyed but not created. Energy can be created b
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Energy can not be created and cannot be destroyed
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How does the amount of space between particles differ in the ballon and helium cylinder
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In a balloon there is a low pressure within the balloon. This means that the particles are more spaced out. Wheras in the cylinder they are under high pressure, meaning that the particles are much closer together!
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HEY BUDDY THE ANSWER IS

It processes the environment and sends out signals.

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Crazy boy [7]

Answer:

1 mole of sodium chloride ions

Explanation:

i hope this answer helps u

plz mark me as brainliest

7 0
2 years ago
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