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3 years ago

The source of energy absorbed in an endothermic reaction

2 answers:

riadik2000 [5.3K]3 years ago

7 0

Chemical reactions that absorb (or use) energy overall are called endothermic. In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products.

Alina [70]3 years ago

7 0

Answer:

The potential energy of the products is higher than the PE of the reactants. That increase in energy comes from the surroundings: energy absorbed from the surroundings.

The potential energy difference is due to the bonds in the reactants being stronger than the bonds in the products. Strong bonds have lower potential energy than weak bonds.

Explanation:

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Having food in your stomach keeps alcohol from being absorbed

insens350 [35]

Having food in your stomach does not allow to keep alcohol from being absorbed but it does allow you to not get intoxicated as fast. this is a (FACT)!!!!

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3 years ago

The solubility of oxygen gas in water at 40 ∘c is 1.0 mmol/l of solution. What is this concentration in units of mole fraction?

juin [17]

The formula for mole fraction is:

$mole fraction of solute = \frac{number of moles of solute}{total number of moles of solution}$ -(1)

The solubility of oxygen gas = 1.0 mmol/L (given)

1.0 mmol/L means 1.0 mmol are present in 1 L.

Converting mmol to mol:

$1.00 mmol\times \frac{1 mol}{1000 mmol} = 0.001 mol$

So, moles of oxygen = 0.001 mol

For moles of water:

1 L of water = 1000 mL of water

Since, the density of water is 1.0 g/mL.

$Density = \frac{mass}{volume}$

$Mass = 1.0 g/ml\times 1000 mL = 1000 g$

So, the mass of water is 1000 g.

Molar mass of water = 18 g/mol.

Number of moles of water = $\frac{1000 g}{18 g/mol} = 55.55 mol$

Substituting the values in formula (1):

$mole fraction = \frac{0.001}{55.55+0.001}$

$mole fraction = 1.8\times 10^{-5}$

Hence, the mole fraction is $1.8\times 10^{-5}$ .

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3 years ago

Describe in your words what it means for a chemical reaction system to be at equilibrium.

Black_prince [1.1K]

To be at equilibrium means the rate of the forward reaction must equal the rate of the reverse reaction. This does not mean that there should be an equal amount of both products and reactants when at equilibrium. It simply means the RATES of the forward and the reverse are equal to one another.

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4 years ago

Which type of element seeks to lose electrons

kvv77 [185]

Metals because, they have less than 3 electrons in the outermost shell and they usually lose electrons.

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3 years ago

Read 2 more answers

Atomic oxygen would most likely form its most stable monatomic ion when it: 1. elevates one electron from the s orbital to a p o

sineoko [7]

Answer:

5. gains two electrons.

Explanation:

In order to determine the most stable monoatomic ion of oxygen, we need to consider the octet rule: atoms will gain, lose or share electrons to complete their valence shell with 8 electrons.

Oxygen is in the Group 16 in the Periodic Table, so it has 6 valence electrons. Therefore, it will gain two electrons to have the electron configuration of the closest noble gas.

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3 years ago