1. ch4 + 202 co2 + 2h20

if you begin with 40g of ch4 and it reacts with 15g of 202 producing

20g of co2, how many grams of 2h20 are produced?

16.36 grams

Explanation:

From the reaction equation:

CH4   +   2O2 CO2     +     2H2O

1         :        2                                    1         :         2

If 20g of CO2 was produced, then the  number of moles of CO2 is given by :

Molar mass of CO2 = 12 + [2 x 16]

                                =  44 gram/moles

Number of moles =  Mass in gram/ Molar mass

=     20/ 44

=     0.4545 moles

if 0.4545 moles of CO2 were produced, then according to the equation of reaction, then:

Number of moles of H2O produced will be = 2 x  0.4545

                                                                         = 0.909moles

Molar Mass of H2O = [1 x2] + [16]

                                 = 18 grams/ mol

The mass of H2O produced will be = Number of moles  x Molar Mass

                                                           =   0.909 moles x  18 grams/mole

                                                           =  16.362 grams

                                                           ≈   16.36 grams

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

can you list the answers so i can answer