Which molecule is an alkyne? A. 2-ethylhexane
B. 2-nonyne
C. trans-2-pentene
D. Pentane

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.