Saline solutions (NaCl in water) used to deliver intravenous drugs are 0.89%(w/v). What mass of NaCl is found in 500. mL of such a solution?
A) 0.45 g
B) 0.89 g
C) 4.5 g
D) 8.9 g
C
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any alteration in the structure of function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment
What will be an ideal response?
The steepest beaches tend to be those with ________
A) the saltiest waves B) no significant waves C) sand D) particles larger than sand E) shorelines facing the Equator
The most effective way to deal with groundwater pollution is to ____.
A. prevent contamination B. use monitoring wells C. cover all wells carefully D. treat all water from underground sources E. use advanced sewage treatment
Which of the following is not part of the water cycle?
A) water evaporating from a lake B) calcium carbonate dissolving in soil water and groundwater C) water moving into creeks and streams following a rainstorm D) water infiltrating into the soil and bedrock