All categories

2 years ago

Which half reaction can occur at the abode in a voltaic cell?

Chemistry

2 answers:

Nezavi [6.7K]2 years ago

6 0

When the circuit is closed electrons flow from the anode to the cathode

Digiron [165]2 years ago

3 0

The oxidation half-reaction occurs at one electrode (the anode), and the reduction half-reaction occurs at the other (the cathode). When the circuit is closed, electrons flow from the anodeto the cathode.

You might be interested in

What are two systems that use radio waves

Goshia [24]

Mobile radio communication
Broadcasting
Navigation systems

7 0

3 years ago

The wavelength of a light wave can be used to measure which of the following

Tema [17]

Wavelength is the distance between crests of the wave.

4 0

2 years ago

A 0.1326 g sample of magnesium was burned in an oxygen bomb calorimeter. the total heat capacity of the calorimeter plus water w

Sladkaya [172]

Answer: Th enthalpy of combustion for the given reaction is 594.244 kJ/mol

Explanation: Enthalpy of combustion is defined as the decomposition of a substance in the presence of oxygen gas.

W are given a chemical reaction:

$Mg(s)+\frac{1}{2}O_2(g)\rightarrow MgO(s)$

$c=5760J/^oC$

$\Delta T=0.570^oC$

To calculate the enthalpy change, we use the formula:

$\Delta H=c\Delta T\\\\\Delta H=5760J/^oC\times 0.570^oC=3283.2J$

This is the amount of energy released when 0.1326 grams of sample was burned.

So, energy released when 1 gram of sample was burned is = $\frac{3283.2J}{0.1326g}=24760.181J/g$

Energy 1 mole of magnesium is being combusted, so to calculate the energy released when 1 mole of magnesium ( that is 24 g/mol of magnesium) is being combusted will be:

$\Delta H=24760.181J/g\times 24g/mol\\\\\Delta H=594244.3J/mol\\\\\Delta H=594.244kJ/mol$

4 0

3 years ago

Which statement describes how NO2- reacts in this equilibrium:

WITCHER [35]

The statement which describes how NO2- reacts in this equilibrium:
<span>H2SO3(aq) + NO2-(aq) HSO3-(aq) + HNO2(aq
is the second option - </span><span>B. as a Brønsted-Lowry base by accepting a proton.
</span>This is because bases take proton H+ in order to become HNO2.

6 0

3 years ago

Read 2 more answers

What is the electron configuration of an element with atomic number 20?

VARVARA [1.3K]

1s2,2s2.2p6,3s2,3p6,3d4,4s2

8 0

3 years ago

Read 2 more answers