Identify the oxidising and reducing agents in these reactions, by looking at the gaming and loss of ovygen.

Chemistry

1 answer:

Maru [420]2 years ago

6 0

Answer:

A is oxidation . B is reduction

Explanation:

A will be oxidation agent because there is gain of

electrons

B will be reducing agent because there is loss of

electrons.

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Fill in the chart to identify how scientists represent matter and chemical changes in matter.

ivann1987 [24]

A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side

A chemical symbol is a notation of one or two letters representing a chemical element

A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.

3 0

3 years ago

The carbon-carbon (C―C) bond has an average bond energy of 347 kJ/mol, which is the energy required to break one mole of C―C bon

olganol [36]

Answer:

(3) 345 nm

Explanation:

Given:

Average C-C bond energy = 347 kJ/mol

To determine:

Wavelength of photon that can break a C-C bond

Calculation:

The energy (E) of a photon is related to its wavelength (λ) by the Planck's equation:

$E = \frac{hc}{\lambda }$

where h = Planck's constant = 6.626*10⁻³⁴ Js

c = speed of light = 3*10⁸ m/s

$\lambda = \frac{hc}{E}$

$\lambda =\frac{6.626*10^{-34}Js*3*10^{8}ms^{-1}*6.023*10^{23}mol^{-1}}{347,000Jmol^{-1}}$

λ = 3.45*10⁻⁷ m

Since 1 nanometer (nm) = 10⁻⁹ m

The calculated wavelength corresponds to 345 nm

6 0

4 years ago

Determine whether each molecule is polar or nonpolar.

JulsSmile [24]

A) Sulfur dichloride (SCl₂) is polar molecule because is bent with asymmetric charge distribution around the central atom (S).
b) Sulfur tetrachloride (SCl₄) is polar because there is lone electron pair around the sulfur.
c) Bromine pentachloride (BrCl₅) is polar because dipole moment do not cancel.

6 0

3 years ago

Phthalates used as plasticizers in rubber and plastic products are believed to act as hormone mimics in humans. The value of ΔHc

jeka94

Answer:

$T_f$ = 25.05°C