Which equation obeys the law of conservation of mass? H2(g) O2(g) → H2O(g) H2(g) O2(g) → H2O(g) 4He(g) 2H2(g) O2(g) → 2H2O(g) H2(g) → H2O(g) H2(g) O2(g) → 2H2O(g).

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi

The volume of a single vanadium atom is 9.29×10-24 cm3. what is the volume of a vanadium atom in microliters?