How do scientists use radioactive decay to date fossils

An atom is a. the smallest unit of matter that maintains its chemical identity. b. always made of carbon. c. smaller than an electron. d. the smallest unit of a compound.

Now moles: _ (1, 2, or 3) _moles of H2 + _ (1, 2, or 3) _ moles of O2 → _ (1, 2, or 3) _moles of H2O

How is the number of unpaired valance electrons in an atom related to the number of bonds that the atom can form?

After substantial heating, 6.25 g of iron produced 18.00 g of a compound with chlorine. The empirical formula is: a. FeCl3 b. Fe3Cl c. Fe2Cl3 d. FeCl2 e. Fe2Cl

Assuming that the gas becomes saturated with benzene vapor and that the total gas volume and temperature remain constant, what is the vapor pressure of the benzene in torr?

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?

Is feeling warmth from a fireplace convection, radiation, or conduction?

Which part of Dalton's atomic theory was disproved by Thomson's experiment? O Atoms cannot be created, destroyed, or divided into smaller particles. O Chemical reactions occur when atoms combine, separate, or rearrange.

Of the following, which is most likely to result after a farmer sprays his crops with pesticides? A. The crops die. B. The insect population increases. C. The soil dries up and blows away. D. A neighbor's well tests positive for pesticides.

How many liters does the following number of atoms of helium take up? 9.42x10^22 atoms He