<span>A. Organic molecules can form in a reducing atmosphere
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Atoms of an element that contain different numbers of neutrons are called isotopes. Each isotope of a given element has thesame atomic number but a different mass number (A), which is the sum of the numbers of protons and neutrons.
Option
A)
and
C)
just cross check with somet
Answer:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted.
From the ideal gas equation, we know that PV = nRT
where, P = pressure, V = volume occupied, n = number of moles of gas, R = universal gas constant=0.082L atm mol-1 K-1 and T = temperature.
Given: P = 2.8 atm, V = 98 l and T = 292 k.
Therefore n =
=
= 11.46