What can be determined from examining the fossil record?

A.

when many life forms became extinct

B.

when many life forms first appeared on Earth

C.

when changes to the diversity of life forms occurred

D.

all of these

Based on the data table, which unknown solution could be 0.1 m naoh

Consider the reaction. 2 Pb (s) + O 2 (g) ⟶ 2 PbO (s) An excess of oxygen reacts with 451.4 g of lead, forming 305.3 g of lead (II) oxide. Calculate the percent yield of the reaction. percent yield:

Why does the suns energy warm earth more at the equator than at the poles

Oil became a major resource with the diffusion of motor vehicles early in the 1800s. Oil became a major resource with the diffusion of motor vehicles early in the 1800s. True False

The digestive system is the body system that Text to speech A:A. breaks down food into substances that can be absorbed and used for energy. B:B. gets rid of the remaining solid waste that cannot be absorbed. C:C.

An experiment is performed using 7 liquids; Methanol, Ethanol, Propanol, Butanol, Water, Pentane and Acetone. a.) The order of rates of evaporation from fastest to slowest are shown: Pentane, Ethanol, Methanol, Acetone, Water, Propanol and Butanol.

What does a molecule look like

If a student calculated 0.02789 moles of copper (II) cations (Cu2 + ions) in the sample, how many moles of copper metal (Cu0) could be obtain from the sample at the end of the experiment?

99pts! Which of the following best explains what happens when the kinetic energy of particles in a gas state decreases? They vibrate so quickly that the particles ionize and become plasma.

Which substance can act as an arrhenius base in an aqueous solution