Give the molecular geometry of each central atom: nitrogen, middle carbon, right carbon,

respectively.

1. linear, angular, tetrahedral

2. angular, angular, tetrahedral

3. angular, trigonal planar, tetrahedral

4. linear, linear, linear

5. linear, tetrahedral, tetrahedral

6. tetrahedral, tetrahedral, tetrahedral

7. trigonal planar, trigonal planar, tetrahedral

8. trigonal planar, trigonal planar, trigonal

planar

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.

the answer to this question is 3.

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

as given the equation is

2al + 6 hcl > 2 alcl3 + 3 h2(g)

as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas

given: three moles of al are present and 7 moles of hcl

for three moles of aluminum nine moles of hcl will be required

however as 7 moles of hcl are present so the limiting reagent is hcl

hcl is going to decide the number of moles of product formed

when six moles of hcl are present = 3 moles of h2 are formed

when one mole of hcl is present == 3/6 mole sof h2 will be formed

when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2