CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formation of CO₂ and H₂O and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is ____________. [nearest integer]

[Assume CNG to be methane]

The moles of methane required to produce 81 g of water after complete combustion is _____________ $$\times$$ 10^$$-$$2 mol. [nearest integer]

A protein 'A' contains 0.30% of glycine (molecular weight 75). The minimum molar mass of the protein 'A' is __________ $$\times$$ 10³ g mol^$$-$$1 [nearest integer]

The number of N atoms in 681 g of C₇H₅N₃O₆ is x $$\times$$ 10²¹. The value of x is (N_A = 6.02 $$\times$$ 10²³ mol^$$-$$1) (Nearest Integer)