Concrete is formed of sand. Is it incorrect to suggest that some houses are built using concrete blocks?
Answer:
The rate is a mathematical relationship obtained by comparing reaction rate with reactant concentrations.
g - Measurement of Mass
m² - Measurement of Area
m³ - Measurement of Volume
km- Measurement of Length
Answer : The correct options are, (C), (D) and (F)
Explanation :
Redox reaction : It is also know as an oxidation-reduction reaction in which the electrons transferred between the two species. In this, one species shows oxidation by losing electrons and another species shows reduction by gaining electrons.
Most of the chemical reactions shows the redox reaction. The chemical reactions like, synthesis, combustion, single replacement, decomposition shows the redox reaction.
As, the reactants of Option A, B and E does not shows redox reaction because in these reactions the metals will not displace the another metal ion due to less reactivity of metal.
While the reactants of option C, D and F shows redox reaction because in these reactions the metals will displace the another metal ion easily due to high reactivity of metal.
The reactivity series is shown below.
The balanced redox reactions will be,



Hence, the correct options are, (C), (D) and (F)
C3H8+ 5 O2 --> 3 CO2 + 4 H2O
44 g. --------> 72 g
33.3 g. --------> x

Answer: The theoretical yield of H2O is 54.5