The chemical formula of hydrogen cyanide is HCN. How many unshared electrons are associated with a molecule of hydrogen cyanide?
A) 2
B) 4
C) 6
D) 10
A
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In the most recent phase of migration to the United States (1970-present), where are the majority of immigrants coming from?
A) England and Africa
B) Ireland and Germany
C) Southern and Eastern Europe
D) Canada and Latin America
E) Latin America and Asia
Can soils can be eroded from distant sources and deposited as soil in new locations?
A) Yes, they are made of sediments and can be transported like sediments. B) No, soils develop in place through the complex weathering of sediments and other materials. C) Yes, the processes of transportation help to break down larger sediments to make soils. D) No, once a soil is created in a location, it cannot be weathered and eroded.
The Bering Glacier is located in the state of ________
A) Colorado B) North Carolina C) California D) North Dakota E) Alaska
What percentage of all living and fossil animals are invertebrates?
a. 10% b. 50% c. 70% d. 80% e. 90%