91Ó°ÊÓ

Refer to the periodic table and indicate the physical state for each of the following elements at \(25^{\circ} \mathrm{C}\) and normal pressure: (a) \(N\) (b) \(\mathrm{Na}\) (c) Ne (d) Ni

Refer to the periodic table and indicate the physical state for each of the following elements at \(25^{\circ} \mathrm{C}\) and normal pressure: (a) S (b) Se (c) Si (d) Sn

Refer to the periodic table and indicate the physical state for each of the following elements at \(25^{\circ} \mathrm{C}\) and normal pressure: (a) hydrogen (b) titanium (c) fluorine (d) bromine

Refer to the periodic table and indicate the physical state for each of the following elements at \(25^{\circ} \mathrm{C}\) and normal pressure: (a) helium (b) manganese (c) iodine (d) mercury

State the composition for a molecule of each of the following vitamins: (a) vitamin \(\mathrm{B}_{1}, \mathrm{C}_{12} \mathrm{H}_{17} \mathrm{~N}_{4} \mathrm{OS}\) (b) vitamin \(\mathrm{B}_{2}, \mathrm{C}_{17} \mathrm{H}_{20} \mathrm{~N}_{4} \mathrm{O}_{6}\)

State the composition for a molecule of each of the following compounds: (a) cholesterol, \(\mathrm{C}_{27} \mathrm{H}_{45} \mathrm{OH}\) (b) quinine, \(\mathrm{C}_{20} \mathrm{H}_{24} \mathrm{~N}_{2} \mathrm{O}_{2}\)

Write the chemical formula for each of the following compounds: (a) vitamin A: 20 carbon, 30 hydrogen, and 1 oxygen atom (b) vitamin \(K: 31\) carbon, 46 hydrogen, and 2 oxygen atoms

Write the chemical formula for each of the following compounds: (a) lysine (an amino acid): 6 carbon, 14 hydrogen, 2 nitrogen, and 2 oxygen atoms (b) methionine (an amino acid): 5 carbon, 11 hydrogen, 1 nitrogen, 2 oxygen, and 1 sulfur atom

What is the total number of atoms in a molecule of each of the following compounds? (a) stearic acid (in animal fat), \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{16} \mathrm{COOH}\) (b) triolein (in vegetable oil), \(\mathrm{C}_{3} \mathrm{H}_{5}\left(\mathrm{C}_{17} \mathrm{H}_{33} \mathrm{COO}\right)_{3}\)

What is the total number of atoms in a molecule of each of the following compounds? (a) citric acid (in citrus fruit), \(\mathrm{C}_{3} \mathrm{H}_{4} \mathrm{OH}(\mathrm{COOH})_{3}\) (b) lactic acid (in sore muscles), \(\mathrm{C}_{2} \mathrm{H}_{4}(\mathrm{OH}) \mathrm{COOH}\)