Chemistry, 18.08.2019 10:20, dward5823

What volume measured in stp will 3.75 grams of helium gas occupy?

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Chemistry, 21.06.2019 23:30, mastershadow2018

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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Chemistry, 22.06.2019 00:00, brookemcelhaney

Which of the following methods uses the decay of atomic particles in an object to find its exact age? a. fossil dating b. geologic dating c. radioactive dating d. relative dating

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Chemistry, 22.06.2019 02:40, hardwick744

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

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Chemistry, 22.06.2019 05:30, livigrace9004

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases