A chemical element is a pure substance that consists entirely of what?

Describe the sequence of events in the formation of sand

1. The "3" in 3 CaCl2 is called the:

a flack that weighs 345.8g is filled with 225 ml of carbon terachloride the weight of the flack and carbon terachloride is found to be 703.55g. from this information calculate the density of the carbon terachloride

A sample of chlorine gas is held at a pressure of 1023.6 kPa. When the pressure is decreased to 8114 kPa the temperature is 36°C, What was the original temperature? Gas Law used:

Water sitting in a raised container has kinetic, nuclear, or potential

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.

What increases in equal steps of one from left to right in the Periodic Table for the elements lithium to neon?

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?