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2 years ago

Calculate the amount of heat required to melt 2108 g of water. The enthalpy of fusion of water is ΔHfus=6.010 kJ/mol.

1 answer:

6 0

since the unit for the heat of fusion is kJ/mol, you're going to have to convert the grams into moles in order to cancel out the unit. After that, you can solve like normal.

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I think it’s D but I’m not sure.. Please help!

alisha [4.7K]

Answer: I think it’s D?

Explanation:

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3 years ago

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Which of the data sets qualitative data?

Kaylis [27]

Answer:

Uh, the second one?

Explanation:

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2 years ago

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Find the [h3o ] in a sauvignon blanc with a ph of 3.24.

KengaRu [80]

Hello!

The H₃O⁺ concentration can be found using the definition of pH and clearing the equation for [H₃O⁺]. The solution has a pH lower than 7, so the Sauvignon Blanc is acid. The calculation for [H₃O⁺] is shown below:

$pH=-log [H_3O^{+}]$

$[H_3O^{+}]= 10^{-pH}=10^{-3,24}=0,00058M$

So, the concentration of H₃O⁺ in a Sauvignon Blanc with a pH of 3,24 is 0,00058 M

Have a nice day!

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2 years ago

C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O + energy In the reaction listed above, 1 molecule of glucose reacts with 6 molecules of oxyg

kirill115 [55]

Answer:

Third choice: energy present in the glucose and oxygen that is not needed for the formation of carbon dioxide and water is released to form energy/ATP.

Explanation:

1) Chemical equation (given):

C₆H₁₂O₆ + 6 O₂ --> 6 CO₂ + 6 H₂O + energy

2) Chemical potential energy:

Each compound stores chemical potential energy. This energy is stored in the chemical bonds.

Due to every substance has its own unique chemical potential energy, when a chemical reaction takes plase, yielding to the change of some substances, some energy is absorbed (when bonds are formed) and some energy is released (when bonds are broken).

3) Conservation of energy:

Then, if the sum of the bond energies of the final products is less than the sum of the bond energies of the reactants, the law of conservation of energy rules that the difference between the total energies of the products and reactants must be released to the surroundings.

That is what is happening in the given reaction:

C₆H₁₂O₆ + 6 O₂ --> 6 CO₂ + 6 H₂O + energy

The term energy in the product side means that energy is conserved because it is being released due to the the glucose and oxygen (reactant side) have more energy stored in their bonds than the energy needed for the formation of carbon dioxide and water, so that excess of energy is released to form energy/ATP.

Summarizing:

The energy on the product side added to the energy of carbon dioxide and water equals the energy of the glucose and oxygen and the final balance is:

∑ Energy of the reactants = ∑energy of the products + released energy, supporting the law of conservation of energy.

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3 years ago

1.Light waves (shown) are an example of what type of wave? (Lesson 4.03)

lesya692 [45]

Answer:

suface wave

Explanation:

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3 years ago