Why does the mass number for an element differ from the average atomic mass for the element?

Entropy is greater at higher trophic levels than at lower levels ... True of False

Use IUPAC nomenclature rules to give a name for this compound N2O3

what is the difference between the number of electrons in an atom selenium and the number of electrons in an atom of aluminum

What makes a pure substance different from a heterogeneous mixture? A.) The components of a pure substance are mixed unevenly instead of evenly within the pure substance. B.

A scientist is investigating the effects of electromagnetic radiation on plant growth. She wants to test the plants with two different types of electromagnetic waves: one with a very long wavelength and one with a very short wavelength.

Determine the molar mass of an unknown monoprotic acid to two decimal places if 20.01 ml of a 0.098 m naoh solution were used to titrate 0.215 g of the unknown acid

A diatomic molecule with a triple covalent bond is A. H2 B. N2 C. O2 D. Br2 (P. S. The answer turned out to be B. N2)

Consider the following half-reactions: Half-reaction E° (V) I2 (s) + 2e - 2I - (aq) 0.535V 2H + (aq) + 2e - H2 (g) 0.000V Zn2 + (aq) + 2e - Zn (s) - 0.

Where did the longest tsunami form?

Calculate the number of H atoms in 0.190 mole C 6 H 14 O .