No, the two isotopes of lithium-6 and lithium-7 are not equally common.
The more plentiful isotope would be lithium-7.
This can be easily demonstrated by assuming that both isotopes were equally common. If that were the case, the average atomic mass would be (6 + 7)/2 = 6.5 amu. Now compare that value if they were both equal to the actual value found in nature. The value found in nature is 6.941 amu which is heavier than the 6.5 amu that would happen if they were equally common. Since the natural value is heavier, that means that there has to be more of the heavier isotope than there is of the lighter one. Therefore lithium-7 is more common than lithium-6.
Molarity= moles/litres
.42M=x moles/.275litres
xmoles=.42M*.275litres= .1155 moles
molar mass of KClO3 = 122.548 grams/moles
mass= 122.548grams/moles* .1155moles= 14.15 grams of PotassiumClorate.\Hopes this loves or thanks.
Answer:
The rate law cannot be defined based on just the formula given.
Explanation:
In the world of chemical kinetics there are four major concepts that are used to define the speed of a reaction. These are Rate Averaging, Equation Stoichiometry, Experimental Rate Laws and Integrated Rate Laws for Orders of Reaction. Each topic requires a reference reaction that has been defined in terms of the definition of reaction rates whose data can be applied to the expression ...
Rate = ΔConcentration/Δtime
If you will provide a balanced equation then empirical relationships can be presented that describe the consumption rate of reactants and/or the formation products. For example:
Given Equation 2NO₂(g) => 2NO(g) + O₂(g) and the measured rate of at least one component of the reaction, the following rate relationships can be defined:
Δ[NO₂(g)]/Δt = Δ[NO(g)]/Δt (Since coefficients are equal then the relationship is 1:1),
Δ[NO₂(g)]/Δt =2· Δ[O₂(g)]/Δt and
Δ[NO(g)]/Δt =2· Δ[O₂(g)]/Δt
Experimental Rate Law is based upon experimental observations of rxn rates as a function of molar concentration changes. The kinetic data is examined for 'Order of Rxn' and applied to the empirical rate law to obtain the numerical rate law.
Empirical Rate Law
Rate = k[NO₂(g)]ᵃ
k = rate constant
a = order of reaction
both are determined from experimentally observing rxn rate as a function of changing concentration of reactants.
Answer:
The gravitational pull of the moon and the rotational force of the Earth cause tides to rise and fall across the planet. The species living in coastal areas most affected by changing tides have unique ways of surviving.
So, the answer is B.
The more mass an object have, the more energy it can absorb before there is an increase in temperature.
from the formula
Q = mcΔT
The more mass, the slower the increase in temperature even if they are made from the same matter