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3 years ago

The burning of fossil fuels produces what kind of energy

Chemistry

1 answer:

leva [86]3 years ago

6 0

Answer:

When fossil fuels are burned carbon and hydrogen react with oxygen in air to carbon dioxide (CO2) and water (H2O). During this reaction heat is released which further amplifies the reaction. Electricity is generated by transforming mechanical energy (heat) to electrical energy in a turbine or generator.

Explanation:

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What do Potassium and Krypton have in common and what are their differences based on their location on the periodic table?

Kamila [148]

Potassium (K) and Krypton (Kr) are in the same period, so they have the same number of electron shells. Potassium is more reactive than Krypton because it only has one valence electron.

K and Kr are both in Period 4, so they each have the n = 1, 2, 3, and 4 shells. Kr is less reactive than K because it already has a complete octet.

“Potassium (K) and Krypton (Kr) are in the same period, so they have the same number of electron shells. Krypton is more reactive than Potassium because it has a full outer shell” is <em>incorrect </em>because having a full outer shell means that the element is unreactive.

“Potassium (K) and Krypton (Kr) are in the same group, so they have the same number of valence electrons. They have different numbers of electron shells” is <em>incorrect </em>for three reasons:

1. K is in Group 1 and Kr is in Group 18.

2. K has one valence electron, and Kr has eight valence electrons.

3. They have the same number of electron shells.

1. K and Kr have different numbers of valence electrons.

2. They have the same number of electron shells.

8 0

2 years ago

For the reaction

s2008m [1.1K]

Answer:

0.558mole of SO₃

Explanation:

Given parameters:

Molar mass of SO₃ = 80.0632g/mol

Mass of S = 17.9g

Molar mass of S = 32.065g/mol

Number of moles of O₂ = 0.157mole

Molar mass of O₂ = 31.9988g/mol

Unknown:

Maximum amount of SO₃

Solution

We need to write the proper reaction equation.

2S + 3O₂ → 2SO₃

We should bear in mind that the extent of this reaction relies on the reactant that is in short supply i.e limiting reagent. Here the limiting reagent is the Sulfur, S. The oxygen gas would be in excess since it is readily availbale.

So we simply compare the molar relationship between sulfur and product formed to solve the problem:

First, find the number of moles of Sulfur, S:

Number of moles of S = $\frac{mass }{molar mass}$

Number of moles of S = $\frac{17.9 }{32.065}$ = 0.558mole

Now to find the maximum amount of SO₃ formed, compare the moles of reactant to the product:

2 mole of Sulfur produced 2 mole of SO₃

Therefore; 0.558mole of sulfur will produce 0.558mole of SO₃

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3 years ago

Scientist use their knowledge of the half-life of carbon and uranium isotopes to measure the age of the rock or fossil .

marusya05 [52]

They can use them to find the age of fossils.

8 0

3 years ago

What other simple sugars have the same chemical formula as glucose?

Usimov [2.4K]

Answer:

The answer to your question is:

Explanation:

Other sugars with the same chemical formula as Glucose:

Sugar Formula Description

Glucose C₆H₁₂O₆ It's the most abundant monosaccharide.

Mannose C₆H₁₂O₆ It's found in plants and some animals.

Fructose C₆H₁₂O₆ It's the sugar of fruits.

Galactose C₆H₁₂O₆ It's found in milk.

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3 years ago

Looking at the Bohr models of atoms offer an explanation as to WHY the atomic size changes as it does for both periods and group

andriy [413]

Element 87 francium have the highest atomic size, so in short the closest element to francium have the high atomic size.

5 0

3 years ago

The burning of fossil fuels produces what kind of energy​

The burning of fossil fuels produces what kind of energy