Classify the following substances as acids or bases. a) unripe lemon juice

b) wood ash

c) liquid in a car battery

d) bicarbonate of soda

Please it's vital.

Explain why scientists use shared characteristics to make cladograms.

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth