What is the appearance of the signal corresponding to the CH₂ protons in the 1H NMR spectrum of ethyl methyl ether, CH₃CH₂OCH₃?

A. a doublet

B. a triplet

C. a quartet

D. a septet

A circuit contains four 20 uh inductors connected in series what us the total inductance of this circuit

A chemical reaction is occurring inside a beaker and the temperature of the beaker is monitored. What would the contents of the beaker be referred to as? the system the surroundings the boundary the universe

Which statement describes a typical path of the North American polar jet stream? A. The polar jet stream weaves east to west over the Arctic Circle. B. The polar jet stream arcs north over southern Texas and then south to the Gulf of Mexico. C.

What is the definition of an element?

Equal volumes of an unknown gas and nitrogen () gas take 5.37 min and 3.55 minutes, respectively, to effuse through a small hole. calculate the molar mass (in g/mol) of the unknown gas.

If the heat released during condensation goes only to warming the iron block, what is the final temperature (in ∘C∘C) of the iron block? (Assume a constant enthalpy of vaporization for water of 44.0 kJ/molkJ/mol.)

Which of the following is not a disaccharide? A) sucrose B) maltose C) lactose D) amylose E) all of the above are disaccarides

The process by which a semipermeable membrane allows water molecules, small molecules, and ions to pass through while retaining large particles

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

An ion from a given element has 22 protons and 18 electrons. what is the charge on the ion?