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Answers by Joan L.

(-3a4b3 )(-5a4b5)   Multiply like variables, multiply the coefficients,  remembering that multiplying two negative numbers give a positive result.   Multiplying variables in exponential form, we add the exponents Result (-3)(-5) =15 a4 x a4 = a8 b3 x b5 =...

Gas law question (answer)

Because the compound is an oxide it contains only nitrogen and oxygen.  The % oxygen in the compound is 100-25.9% =74.1% Remember in empirical formula we can treat the % as having 100g of the compound, there would be 25,9 g nitrogen and 74.1 g oxygen. Steps in empirical formula 1...

-5/6 +(-5/18)=? (answer)

Rewrite fractions with the same denominator (preferably the lowest factor for both numbers.  This is 18 in his case. -5/6 + (-5/18) = -15/18 + (-5/18) Now that we have done that we can add the numerators  and place the answer over the denominator. -15 + (-5) = -20/18 The...