Answer:
Explanation:
Physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance Eg Melting of ice while chemical change is a permanent and not so easily reversible change in which the identity of the substance is altered to produce one or more substances Eg Combustion
Answer:
The correct answer will be "".
Explanation:
We have:
Moles of solute (Na₂Co₃) =
=
=
Now,
The volume of the solution will be:
⇒
∴
The formula to find the concentration will be:
⇒
On substituting the given values, we get
⇒
⇒
<em>I think that the answer is C.)</em>
<em>It makes the most sense because one or two of the other options talk about the sun getting closer to the earth which makes no sense. Also, the Earth's spinning speed does not slow down so that rules out option B. Lastly, the answer cannot be A whereas the sun's light does not fade, rather the Earth spins with a shadow casting over its back due to no sunlight on that facing side.</em>
<em>Hope this helps and have a nice day.</em>
<em>-R3TR0 Z3R0</em>
Answer : The correct option is, (A)
Explanation :
Rate law : It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.
As we are given that:
Rate of disappearing component A =
Rate of appearing component B =
Rate of appearing component C =
The general reaction is:
As per question the stoichiometry relation will be:
Now put the values of rate of following components, we get:
Thus, the stoichiometry relation is:
a : b : c = 2 : 1 : 3
Thus, the required equation will be:
Hydrogen is different from alkali metals because it also exhibits the properties of inert gas