Is iron a substance or mixture?

1. How does the amount of energy stored in glycogen compare to the amount stored as triacylglycerols? 2. What two reasons make glycogen a less efficient energy storage material than triacylglycerols? 3.

How many moles of magnesium are needed to react with 3.0 mol of O2? 2Mg (s) + O2 (g) → 2MgO (s)

All substances are composed of which type of matter? a. ions b. mixtures c. elements d. molecules

What characteristic of the molecule is important for this force to be effective in bonding?

Scientific investigations are carried out by the following the scientific

What volume of 20 mg/L dye would be required to make 50. mL of. 10 mg/L dye?

A weather balloon at Earth's surface has a volume of 3.9 L at 299 K and 763 mmHg. If the balloon is released and the volume reaches 4.13 L at 720 mmHg, what is the temperature? Answer in units of K.

Molecules that resemble fats but contain phosphate functional groups are called: a. steroids. b. polypeptides. c. phospholipids. d. nucleic acid.

Draw the correct structural formula for the following compounds: (be sure to include the hydrogen atoms where required) a) 2-pentene b) 2,3-diethyl-3,5-dimethylhexane c) 4-ethyl-2,6-dimethyl-2-heptene

4. Electronegativity is a measure ofA) the energy needed to remove an electron from an atom. B) the energy released when an electron is added to an atom. C) the magnitude of the negative charge on an electron.