What kind of streambed would cause the most friction?

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A shallow streambed causes the most friction

Explanation:-

A streambed is the channel bottom of a water body like a river. Stream velocity is greatest in midstream near the surface and is slowest along the stream bed and banks due to friction.

The greater the cross-sectional area in comparison to the perimeter, the stream will be more freely flowing because less of the water in the stream is in proximity to the frictional bed.

Hence a shallow streambed would cause the most friction having the least cross sectional area.

i think its 100.

hope this !

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