Please help!! 1) Find the volume of 28 g CO2 at STP? 2) Using your answer in #1 determine the density of carbon dioxide. 3) In the combustion reaction of methane gas : CH4 (g) + ( g) CO2 (g) + 2 H2O (g) 4.0 * 10 exp 23 molecules of CH4 was used. Determine (a ) the moles of CO2 produced b) using your answer in ( a), calculate the volume of CO2 produced at STP c ) the volume of oxygen used in the reaction at STP

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.