2C2H2 + 502 + 4CO2 +2H2O If 3.45 moles of C2H2 are burned, how many moles of O2 are needed? Show your work. Include proper units and round your final answer to the hundredths place.​

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Which of the following molecules is polar? c3h7oh c2h5cooh

Detrimental the length of the object shown 1. 97.8mm 2. 97.80 mm 3. 97mm 4. 98mm