genyjoannerubiera
02.03.2021 •
Chemistry
There are 3.0 g of NO and 3.0 g of CO reacting. what is the limiting reactant ?
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Ответ:
NO will be the limiting reagent.
Explanation:
The balanced equation is:
2 NO + 2 CO → N₂ + 2 CO₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
NO: 2 molesCO: 2 molesN₂: 1 moleCO₂: 2 molesBeing the molar mass of each compound:
NO: 30 g/moleCO: 28 g/moleN₂: 28 g/moleCO₂: 44 g/moleThen by stoichiometry the following quantities of mass participate in each reaction:
NO: 2 moles* 30 g/mole= 60 gCO: 2 moles* 28 g/mole= 56 gN₂: 1 mole* 28 g/mole= 28 gCO₂: 2 moles* 44 g/mole= 88 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: If 56 grams of CO react with 60 grams of NO, 3 grams of CO react with how much mass of NO?
mass of NO= 3.21 grams
But 3.21 grams of NO are not available, 3 grams are available. Since you have less moles than you need to react with 3 grams of CO, NO will be the limiting reagent.
Ответ:
74.4 ml of millimeters needed to react with 15 grams of baking soda
Explanation:
Given data
n C8 H8 07= 0.8 M
m NaHCO3=15 g
Solving the problem:
From the equation we get,
3x C6 H8 07 = NaHC03
Finding the molar mass for the baking soda
NaHCO3= 23+1+12+3 x16= 84 g / mol
so,
n NaHCO3= m NaHCO3/ M NaHCO3
And then,
n C6 H8 07 =1/3 × n NaHCO3
From the definition of the molarity we get
V C6 H8 O 7=n C6 H8 07/C6 H8 07
=n NaHCO3/3 × C6 H8 07 =
m NaHCO3/ M NaHCO3/ 3 × C6 H8 07
Calculating the equation we get,
V C6 H8 O 7= 15/84/3 ×0.8=5/84 ×0.8= 0.0744L= 74.4 ml
74.4 ml of millimeters needed to react with 15 grams of baking soda
n C8 H8 07= 0.8 M
m NaHCO3=15 g
Solving the problem:
From the equation we get,
3x C6 H8 07 = NaHC03
Finding the molar mass for the baking soda
Nahco3= 23+1+12+3 x16= 84 g / mol
so,
n NaHCO3= m NaHCO3/ M NaHCO3
And then,
n C6 H8 07 =1/3 × n NaHCO3
From the definition of the molarity we get
V C6 H8 O 7=n C6 H8 07/C6 H8 07
=n NaHCO3/3 × C6 H8 07 =
m NaHCO3/ M NaHCO3/ 3 × C6 H8 07
Calculating the equation we get,
V C6 H8 O 7= 15/84/3 ×0.8=5/84 ×0.8= 0.0744L= 74.4 ml
74.4 ml of millimeters needed to react with 15 grams of baking soda