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viktelen [127]
3 years ago
13

Determine the basic oxidationnumber for elements in s and porbitals​

Chemistry
1 answer:
Andrews [41]3 years ago
7 0

Answer:

Explanation:

The oxidation state, sometimes referred to as oxidation number, describes the degree of oxidation (loss of electrons) of an atom in a chemical compound. Conceptually, the oxidation state, which may be positive, negative or zero, is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic, with no covalent component. This is never exactly true for real bonds.

The term oxidation was first used by Antoine Lavoisier to signify reaction of a substance with oxygen. Much later, it was realized that the substance, upon being oxidized, loses electrons, and the meaning was extended to include other reactions in which electrons are lost, regardless of whether oxygen was involved.

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Kemmi Major does some experimental work on the combustion of sucrose: C12H22O11(s) 12 O2(g) → 12 CO2(g) 11 H2O(g) She burns a 0.
Pavlova-9 [17]

Answer: 5.81\times 10^6J/mol

Explanation:

Heat of combustion is the amount of heat released when 1 mole of the compound is completely burnt in the presence of oxygen.

C_{12}H_{22}O_{11}(s)+12O_2\rightarrow 12CO_2(g)+11H_2O(g)

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.05392g}{342g/mol}=1.577\times 10^{-4}moles

Thus 1.577\times 10^{-4}moles of sucrose releases =  916.6 J of heat

1 mole of sucrose releases =\frac{916.6}{1.577\times 10^{-4}}\times 1=5.81\times 10^6J of heat

Thus ∆H value for the combustion reaction is 5.81\times 10^6J/mol

6 0
4 years ago
Sulfur has an atomic number of 16. how many covalent bonds can sulfur form?
maksim [4K]
Two because it has six electrons in it's valence shell and it still has space for two more
8 0
4 years ago
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What kind of reaction is 2C2H6 + 7O2 = 4CO2 + 6H2O
ahrayia [7]

Answer:

A combustion reaction

Explanation:

C

organic compound(contains carbon) reacts with oxygen to give out carbon dioxide and water is a complete combustion.

6 0
3 years ago
What phenomenon does the Coriolis effect arise from making it so we see more than two large convection cells on Earth? Curvature
vredina [299]

Answer:

The Coriolis effect is caused by the rotation of the earth around its own axis.

Explanation:

The Coriolis effect arises from the fact that different latitudes of the earth's surface rotate at different speeds. The path of wind on earth is deflected by the Coriolis effect. As things move over the earth, they meet different speed areas, which causes the Coriolis Effect to divert their route.

Thus, The Coriolis effect is caused by the rotation of the earth around its own axis.

7 0
3 years ago
Question5 of 20If 2.891 g MgCl2 is dissolved in enough water to make 500.0 mL of solution, what is the molarity of the magnesium
mojhsa [17]

Answer:

the molarity of MgCl2 = 6.073 x 10^-2 M

Explanation:

Molarity = mole (n) divided by volume of solution (V) in liter = n/v

mole (n) = mass (m) divided by molecular mass (Mm) = m/Mm

n of MgCl2 = 2.891/95.3 = 0.03033 mole

v of solution = 500 ml = 0.500 L

Molarity = n/v = 0.03033/0.500 = 0.06066 M = 6.07 x 10^-2 M

5 0
3 years ago
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