Answer:
Explanation:
Whenever a question asks you, "What is the concentration after a given time?" or something like that, you must use the appropriate integrated rate law expression.
The reaction is 2nd order, because the units of k are L·mol⁻¹s⁻¹.
The integrated rate law for a second-order reaction is
Data:
k = 2.4 × 10⁻²¹ L·mol⁻¹s⁻¹
[A]₀ = 0.0100 mol·L⁻¹
[A] = 0.009 00 mol·L⁻¹
Calculation
:
Answer:
decomposition reaction
Explanation:
oxygen is broken down from magnesium oxide (mgo)
Answer:
1 mole of carbon-12 has 6.02 x 1023 atoms. you need to know how many moles there are in 20 grams of carbon-12. One mole of anything is the same number of grams as the molecular mass, since the molecular mass of carbon-12 is 12, there are 12 grams in 1 mole of it, and therefore 20/12 = 5/3 moles in 20 grams
Answer: 8.3 moles
Explanation:
Number of moles of lithium = ?
Mass in grams = 25 grams
Molar mass of lithium = 3g/mol
Recall that:
Number of moles = (Mass in grams / Molar mass)
Number of moles = 25 grams / 3g/mol
= 8.3 moles
Thus, there are 8.3 moles of lithium in 25 grams of lithium
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