adding signed fractions

It is the ratio of number of moles of one component (solute or solvent) to the total number of moles of all the components (solute and solvent) present in the solution. It is denoted by the symbol X. Let us suppose that a solution contains two components A and B and suppose that n A moles of A an..

Compare the fractions 9 11 and 4 11 using the appropriate sign. => 9 11 < 4 11 or 9 11 = 4 11 or 9 11 > 4 11..

What is the least value of a proper fraction which, when added to 3 5 7 , makes it a whole number? => 1 7 or 2 7 or 5 7 or None of the above..

When a fraction is added to 5 21 , the sum is 10 21 . Find the fraction. => 1 21 or 1 5 or 5 21 or 21 5..

If a system consists of two point charges q 1 and q 2 , then the total charge of the system is got by adding q 1 and q 2 . Thus, the charge add up like real numbers (scalars). When we add charges, one should take care of its sign..

Additivity - If a system consists of two point charges q 1 and q 2 , then the total charge of the system is got by adding q 1 and q 2 . Thus, the charge add up like real numbers (scalars). When we add charges, one should take care of its sign..

If the degree of the numerator is greater than the degree of the denominator in a rational fraction, then the rational function is called improper rational function. Like the case of improper fractions reducible to an integer added to a proper fraction, impro..

>Oxygen is present 21% by volume in air. It supports life and combustion. It is added to air by photosynthesis and removed from air by respiration and combustion. Nitrogen is present 78% by volume in air. It is present in proteins, which are essential for life. It is removed from air by l..

Reactants are written on the left side separated by + signs. Products are written on the right, also separated by + signs. ' D ' (the greek capital letter delta) placed over or below the arrow means that heat was added to the reactants. (g) means that the substance is ..

(i) Radioactive dating This gives us an approximate age of the rock or material containing the radioactive atoms. For e.g., A measurement of a fraction of uranium atom which have decayed into lead (by knowing the half life of uranium) tells us how old the rock is. (ii) Radiation from s..