3) at stp, a 22.4-liter sample of nh3(g) contains the same number of molecules as a) 11.2 l of h2(g) b) 22.4 l of co2(g) c) 33.6 l of ch4(g) d) 44.8 l of o2(g)

B) 22.4L of CO2 (g)

Explanation:

Given data

At STP,

the volume of each gas is 22.414 dm³ (1 dm³ = 1 L),

one mole of a gas=  22.414 dm³= 22.414 litre,

according to Avagadro's number:

one mole of a gas = 6.02 x 10^23 molecules.

Solution:

One litre of NH3 = (6.02x 10^23)/ (22.414)

                             =2.68 x10^22 molecules of NH3.

22.4 litre of  NH3= 22.4 x 2.68 x10^22

                            = 6.01x 10^23 molecules of NH3.

A)

One litre of H2 = (6.02x 10^23)/ (22.414)

                             =2.68 x10^22 molecules of H2.

11.2 litre of H2= 11.2x 2.68 x10^22

                            = 3.01x 10^23 molecules of H2.

Similarly,

B)

One litre of CO2 = (6.02x 10^23)/ (22.414)

                             =2.68 x10^22 molecules of CO2.

22.4 litre of  CO2= 22.4 x 2.68 x10^22

                            = 6.01x 10^23 molecules of CO2.

From here we see that option B is the correct one.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.