1-16. following are the results of a sieve analysis on a granular soil: sieve retained mass 2.5 mm (1/2 in.) 9.5 mm (3/8 in.) 4.75 mm (no. 4) 2.36 mm (no. 8) 1.18 mm (no. 16) 300 pm (no. 50) 75 um (no. 200) pan 74.5 g 217.1 g 192.3 g 75.8 g 116.9 g 83.2 g 47.4 g complete the calculations for the grain-size distribution curve and plot the results. calculate the percent of gravel, sand, and fines. calculate the effective size and uniformity coefficient.

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.

the dependant variable is spilled water

the independent is the heat