The balanced chemical reaction is:
CH4 + 2O2 —> CO2 + 2H2O
You need to convert mass to moles (divide by molar mass):
CH4 moles = 5 / 16 = 0.31 mol
O2 moles = 5 / 32 = 0.16 mol
To figure out which reactant is limiting, divide the actual moles by the corresponding coefficient in the reaction:
CH4: 0.31 / 1 = 0.31
O2: 0.16 / 2 = 0.08
O2 is the lower number, so it is the limiting reactant. From the reaction we know it takes 2 moles of O2 to react with each mole of CH4. Therefore, for however many moles of O2 we actually have, half as many moles of CH4 will react. Since we have 0.16 mol of O2, only 0.08 mol of CH4 will react, leaving behind 0.31 - 0.08 = 0.23 mol of CH4.
Now convert back to mass (multiply by molar mass) to find the mass of CH4 remaining:
0.23 x 16 = 3.68g
The closest answer is B.
Explanation:
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Answer:
John Dalton's Atomic Model Below ⬇
Explanation:
<h3>Answer:</h3>
Gas: <u>Takes the shape and volume of an entire container</u>.
Solid: <u>Has a fixed volume and shape</u>.
Plasma: <u>Charged particles that do not have a definite shape or volume</u>.
Liquid: <u>Assumes the shape of the part of the container from the bottom up</u>.
<h3>Explanation:</h3>
Due to weak / negligible intermolecular or interatomic forces the gases tends to occupy the shape of the container. Hence, they are said to be having no definit shape and volume.
Due to presence of stronger intermolecular forces as compared to gases liquids have definite volume but they don't have definite shape therefore, adopts the shape of the container from the bottom up.
Solid state of matter is characterized by its hardness, definite shape and volume, rigidity and mechanical strength. They have the strongest intermolecular forces among the molecules.
Plasma is said to be the fourth state of matter, which is the mixture of +ve ions, -ve electrons and neutral particles. It shares majority of the properties of gas state.
Answer:
ExplanaA) A decrease in reactant concentration reduces the frequency of successful collisions. tion:
As a reactant gets used up, there are fewer molecules present to collide with others. A reaction depends on molecular collisions. When there are fewer collisions, the reaction slows down.
B) is wrong. A reaction is usually carried out at constant temperature,
C) is wrong. Not all reactions need catalysts.
D) is wrong. If the temperature is constant, pressure will have little effect on the movement and energy of molecule.
