In a particular titration experiment a 25.0 mL sample of an unknown diprotic acid required 30.0 mL of 0.200 M NaOH for the end point to be reached. What is the concentration of the acid?
A) 0.120 M
B) 0.167 M
C) 0.240 M
D) 0.333 M
A
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In the hierarchical system of classification, a family can be defined as ________
A) an overall category containing organisms that share fundamental structures and functions B) a major subdivision of a phylum or a division containing one or more orders C) a major subdivision of an order containing one or more genera D) a group of organisms that are very closely related to one another E) a group of individuals that are able to interbreed with one another
Larger north-south temperature contrasts occur in summer
Indicate whether the statement is true or false
To use the VSEPR model to determine the geometry of a molecule we need to know which of the following?
A) the number of atoms in the molecule B) the number of atoms bonded to the central atom C) the number of lone pairs around the central atom D) both b and c
Which of the following is true?
A) The IPCC Climate Change found no proof of anthropogenic climate change. B) The IPCC is certain all climate change is now caused by humans. C) The IPCC has regulated the end of all CO2 emissions to the atmosphere. D) The IPCC believes recent climate changes to be very likely caused by humans. E) The IPCC recommendations are questionable because scientists were paid off.