An oxygen molecule contains a double bond because the two atoms of oxygen share a total of

(1) 1 electron (3) 3 electrons

(2) 2 electrons (4) 4 electrons

What are some of the limitations of forensic drug chemistry?

1. Directions: Select each correct answer. Biotic factors of an ecosystem could include which of the following? A. all types of plants B. the quantity of water available C. the temperature range D. all animal populations

A cube has a mass of 27 g and length of 3cm. What is it's density

How long has there been life on earth? a. 4.6 billion years, b. 3.7 billion years, c. 65 million years, d. 3 million years

Which of the following statements is TRUE? A. Endothermic processes decrease the entropy of the surroundings, at constant T and P. B. Endothermic processes are never spontaneous. C. Entropy is not a state function. D.

The uranium used for nuclear fuel exists in nature in several minerals. Calculate how many moles of uranium are in 8.00 moles of the following: 1. carnotite, K2 (UO2) 2 (VO4) 2 • 3H2O 2. uranophane, CaU2Si2O11 • 7H2O 3.

What is the chemical formula of a compound that is composed of the ions Ca2 + and br-

What element is likely to form an ionic compound with chlorine?

Will a parachute slow a skydiver more at a very high altitude or a lower altitude?

Carbon monoxide is: Only found in large cities An odorless, colorless, toxic gas Healthy to breath in A danger when driving on the open highway