A chemistry student weighs out 0.0391g of phosphoric acid H3PO4 , a triprotic acid, into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1400M NaOH solution. Calculate the volume (in mL) of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits.

Hannah is writing a report on how albedo affects the global climate. she’s proofreading her passage for any factual errors. which sentence must hannah correct before submitting her report? earth receives energy from the sun. this energy drives many of the processes on earth, including its climate. some part of this energy is reflected by earth’s surface. we use the term albedo to describe the reflected energy. albedo of an object is the ratio of the reflected radiation to the total radiation reaching the object. a value of 0 means no energy is absorbed by the object, whereas a value of 1 means that all of the energy is absorbed. in this way, the albedo of an object can influence earth’s atmospheric temperature.

Geothermal energy for industrial use is available almost anywhere. a. true b. false

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?