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2 years ago

What's reaction kinetics?

1 answer:

7 0

Answer: a branch of chemistry concerned with the rate of chemical reactions, the factors that influence these rates, and the use of rate studies to clarify reaction mechanisms

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Given the two half-reactions, what must be done in the next step before the reaction can be balanced? Au3+ --> Au I- --> I

Artyom0805 [142]

Answer:

The balance equation is

$2Au^{+3} + 6I^{-}$ → $2Au + 3I_{2}$

Explanation:

first, we have to make sure that the atoms are balanced

$Au^{+3}$ → $Au^{}$

$2I^{-}$ → $I_{2}$

then we proceed to balance charges of each half-reaction

$Au^{+3} + 3e^{-}$ → $Au^{}$

$2I^{-}$ → $I_{2}$ $+ 2e^{-}$

Now we multiply the half-reactions to match the number of electrons in each one

( $Au^{+3} + 3e^{-}$ → $Au^{}$ )x2

( $2I^{-}$ → $I_{2}$ $+ 2e^{-}$ )x3

and now we do the sum of the half-reactions

2 $Au^{+3} + 6e^{-}$ → 2 $Au^{}$

$6I^{-}$ → 3 $I_{2}$ $+ 6e^{-}$

$2Au^{+3} + 6I^{-}$ → $2Au + 3I_{2}$

note: the only atom that needed to be balanced was I

3 0

4 years ago

Read 2 more answers

2NaClO3 ——> 2NaCl + 3O2

Alborosie

Answer:

<h3>1) 208.09 g</h3><h3>2) 7.11 × 10²² particles</h3>

<h2>Explanation:</h2><h3>NUMBER ONE</h3>

<u>Find moles of Known Substance (NaCl)</u>

Moles of NaCl = mass ÷ molar mass

= 114.25 g ÷ 58.44 g/mol

= 1.955 mol

<u>Use Mole Ratio of Known to Unknown (NaCl : NaClO₃) to Determine Moles of Unknown</u>

The mole ratio of NaCl to NaClO₃ is 2 to 2 or simply 1 to 1.

This means that for each mole of NaCl produced the same number of moles of NaClO₃ was decomposed.

∴ since moles of NaCl = 1.955 mol,

then moles of NaClO₃ = 1.955 mol

<u>Find Mass of Unknown </u>

Mass of NaClO₃ = moles × molar mass

= 1.955 mol × 106.44 g/mol

= 208.09 g

<h3>NUMBER TWO</h3>

<u>Determine the Moles of Known (O₂)</u>

moles of O₂ = (volume × density) ÷ molar mass

= (68.30 L × 0.0828 g/L) ÷ 32 g/mol

= 0.177 mol

<u>Use Mole Ratio of Known to Unknown (O₂ : NaClO₃) to Determine Moles of Unknown</u>

Mole ratio of O₂ : NaClO₃ is 3 : 2. Therefore for each mole of oxygen produced, ²/₃ the moles of NaClO₃ is produced.

∴ if moles of O₂ = 0.177 mol

then moles of NaClO₃ = 0.177 mol × ²/₃

= 0.118 mol

<u>Find the Number of Particles of Unknown</u>

Number of particles = moles × Avogadro's Number

= 0.118 mol × (6.022 × 10²³ particles/mol)

= 7.11 × 10²² particles

3 0

3 years ago

The periodic table organize elements based on

e-lub [12.9K]

The elements are arranged by their atomic number but are also grouped by what type of element they are.

For example, metals, non metals, metalloids, and noble gasses will be grouped with elements that match them.

Hope this makes sense!

7 0

4 years ago

What is the advantage of having valves in the

fenix001 [56]

The valves stop the blood from flowing backwards

6 0

3 years ago

a container of liquid is sitting on the countertop. What happens to the temperature of the liquid as it evaporates

Archy [21]

When a molecule is going through any physical change, solid to liquid or liquid to gas, as it changes, the temperature remains constant. it does not increase or decrease, it stays at that temperature/.

For example, water evaporates/ boils at 100 C. if you are heating water to the point of boiling, it will remain 100 C until all the water evaporates. Once it becomes a gas, the temperature will continue to increase

7 0

3 years ago

Read 2 more answers

What's reaction kinetics?​

What's reaction kinetics?