How many grams of methane (ch4) does it take to make 16.5g of h2o according to the reaction shown below? ch4 + 202 co2 + 2h2o

 The  number of grams  of methane  that it take to make 16.5 g   of H2o is  7.33 g of methane

  calculation

CH₄  + 2O₂ → CO₂  +2H₂O

step 1:  find the  moles of H₂O

moles = mass÷  molar mass

from periodic table the  molar  mass  of H₂O=  [(1 x2) +16]  = 18  g/mol

moles  = 16.5 g÷ 18 g/mol =0.9167  moles

step 2 :  use the  moles ratio to determine  the moles of CH₄

 CH₄ :H₂O  is  1:2 therefore the  moles of CH₄  = 0.9167 x 1/2 =0.4584  moles

Step 3:  find mass  of CH₄

mass =  moles x  molar mass

from periodic table the  molar mass  of CH₄  = [12+ (1 x4)] = 16 g/mol

mass = 0.4584  moles   x 16 g/mol = 7.33 g

answer: option (b) is the correct answer.

explanation:

a covalent bond is formed by sharing of electrons. whereas polarity arises due to difference in electronegativity of two atoms.

therefore, more is the electronegativity of an atom which combines with the titanium, more readily it will induce a partial positive and negative charge.

thus, out of the given options fluorine is most electronegative and has an incomplete octet. therefore, it will readily combine with titanium to share the electrons and complete its octet.