According to the United Nations, how many people lack access to safe drinking water?

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?