How many hydrogen atoms are present in an alkyne with 5 carbon atoms?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?