Chemistry, 30.06.2019 22:00 kdencemartin
Select the correct answer. what is the mass of 1.72 moles of sodium nitrate? use the periodic table and the polyatomic ion resource. a. 85.0 g b. 91.2 g c. 146 g d. 273 g
Answers: 2
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Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.
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Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity
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Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.
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Select the correct answer. what is the mass of 1.72 moles of sodium nitrate? use the periodic table...
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