The use of more advanced tools made of stone, wood, and bone, such as the ones illustrated below, was typical of which period of human history?

a. Paleolithic era

b. Neolithic era

c. Bronze Age

d. Iron Age

List the steps needed to convert the number of atoms to the mass of an element. (Hint: there are 2).

Calculate the density of gold (in units of g/mL) if a 5.00 cm cube has a mass of 2.41kg

For the reaction N2 (g) + 3H2 (g) 2NH3 (g), what will happen if hydrogen gas was removed from the mixture?

Given the balanced equation: I + I==> I2 Which statement describes the process represented by this equation? (1) A bond is formed as energy is absorbed. (2) A bond is formed and energy is released. (3) A bond is broken as energy is absorbed.

Lisa's doctor tells her that she needs to eat more foods that contain calcium to maintain her bone health. What could happen if Lisa doesn't follow her doctor's orders?

When you overshoot during titration what is the result

The transmission of heat requiring the movement of a liquid or a gas is A. transduction. B. convection. C. radiation. D. conduction

The molecular formula HOH is an example of an

Which choice is an example of an endothermic process? . conversion of steam to ice . conversion of steam to water . conversion of water to ice . conversion of ice to steam

Cobalt chloride hexahydrate has a formula weight of 237.9 g/mol. how much would you use to make 0.5 liter of a 0.3 m solution?