This type of data transmission is characterized by continuous information that may be actively changing and is generally characterized by a sin wave

The answer is an analog transmission. It is a continuous sine wave that varies in phase, amplitude or frequency. Measured in Heartz (Hz). The other is digital transmission that has discrete pulses, rather than continuous, and the pulses represent bits (1s and 0s) which can only be modulated by the voltage or intensity (in optical transmission). Measured in Bits per Second.

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