____ connect(s) atoms by sharing the energy of paired electrons
a. Covalent bonds
b. Hydrogen bonds
c. Cohesion
d. Adhesion
ANS: A
Covalent bonds are those that form when electrons are shared between atoms. This sharing of electrons
holds the atoms together. Information can be found in the section The Water Molecule Is Held
Together by Chemical Bonds
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Carl and Don run separate chemical fertilizer manufacturing companies in the same industrial park. Both pollute the river flowing through the industrial park with debris and waste from their manufacturing processes. In the table below, the first row shows the current level of debris and waste each produces that makes its way into the river. The information in the table also indicates how much it would cost each manufacturer to reduce its pollution by additional increments of 10 pounds. If the government imposes a pollution tax of $7 for each 10 pounds of debris, total pollution will fall by ____ pounds, at a total cost of ____.
A. 40; $28 B. 40; $17 C. 40; $22 D. 60; $30
The major end product of chemical weathering is(are) _______.
a - clays b - sands c - silts d - talus e - airborne dust
The majority of spoken African languages descend from which language family?
a. European b. Nilo-Saharan c. Niger-Congo d. Afro-Asiatic e. Austronesian
Hydrogen Fuel Cell Vehicles
A. produce water as their only waste product. B. use hydrogen gas for fuel. C. are currently available in many states. D. use hydrogen gas for fuel and produce water as their only waste product.