Verfiy the following: `(-21) xx [(-4) + (-6)] = [(-21) xx (-4) ] + [(-21) xx (-6)]`

Verfiy the following: 18x [ 7 + (-3)] = [18 xx 7] + [18 xx (-3)]

Find the product: (-18) xx (-5) xx (-4)

Find the product: (-1) xx (-2) xx (-3) xx4

Find the product of: (-3) xx (-6) xx (-2) xx (-1)

Find each of the following productes: (-21)xx(-30)

Solve the following equation: 3(n-5)=21

Find: (ii) 8xx4.6

Solve the following equations: 3(n-5)=-21

Henry 's law constant for the solubility of N_(2) gas in water at 298 K is 1.0 xx 10^(5) atm . The mole fraction of N_(2) in air is 0.6 . The number of moles of N_(2) from air dissolved in 10 moles of water at 298 K and 5 atm pressure is a. 3.0 xx 10^(-4) b. 4.0 xx 10^(-5) c. 5.0 xx 10^(-4) d. 6.0 xx 10^(-6)