Which elements would be the equivalent of the noble gases? Express your answers as chemical symbols. Enter your answers in order of increasing atomic number separated by commas.

The enthalpy of fusion of methanol (CH3OH) is 3.16 kJ/mol. How much heat would be absorbed or released upon freezing 25.6 grams of methanol?

A compound with molecular formula C6H15N exhibits a singlet at d 0.9 (1H), a triplet at d 1.10 (3H), a singlet at d1.15 (9H), and a quartet at d 2.6 (2H) in its 1HNMR spectrum. Its IR spectrum shows one medium absorption band near 3400 cm-1.

Which of the following measurements is expressed to three significant figures? a. 7077 mg b. 0.080 km c. 5.60 mm

How many valence electrons does a neutral atom of oxygen have?

Draw the structure of two alkenes that would yield 1-methylcyclohexanol when treated with Hg (OAc) 2 in water, then NaBH4:

Is it true or false that gamma rays have no mass and no electrical charge

True or False? Urea has a high solutiblity in water, due in part to its ability to form hydrogen bonds

Give a reasonable explanation why segments 2 and 4 are not associated with temperature increases even though heat is added a constant rate.

20.0 g of Nitrogen is produced when oxygen gas reacts with NO gas. 29.8 L of oxygen is required at STP to produce this 20.0 g of NO. A. yes B. false

What are some chemical properties of Nitrogen?