31. Ninety-seven percent of the Earth's supply of water is in the oceans. Activity Series of Metals Which of these is the second largest [most active] supply of the Earth's water? Li Rb A) clouds K B) groundwater Cs C) lakes and rivers Ba D) icecaps and glaciers Sr Ca Na Mg Al 32. Compared to the density of water at Ti 4°C, the density of water at 80°C is Mn A) less Zn B) greater Cr C) the same Fe D) gone Co Ni Sn Pb 33. Which phrase best describes diatomic *H2* molecules? Cu A) molecules with one atom only Ag B) molecules with one atom and one Au ion [least active based on the hydrogen standard] C) molecules with two atoms of the same element D) molecules with two different element's atoms 30. The best source of water for a home in a rural location that is far from lakes or rivers is A) the ocean 34. Which ion is shown with its correct charge? B) groundwater A) Ca2+ C) ice caps B) K- D) clouds C) Nº D) He3+
Activity Series of Metals [most active] Li Rb K Cs Ba Sr Ca Na Mg Al Ti Mn Zn Cr Fe Co Ni Sn Pb *H2* Cu Ag Au [least active based on the hydrogen standard] 30. The best source of water for a home in a rural location that is far from lakes or rivers is A) the ocean B) groundwater C) ice caps D) clouds 31. Ninety-seven percent of the Earth's supply of water is in the oceans. Which of these is the second largest supply of the Earth's water? A) clouds B) groundwater C) lakes and rivers D) icecaps and glaciers 32. Compared to the density of water at 4°C, the density of water at 80°C is A) less B) greater C) D) the same gone 33. Which phrase best describes diatomic molecules? A) molecules with one atom only B) molecules with one atom and one ion C) molecules with two atoms of the same element D) molecules with two different element's atoms 34. Which ion is shown with its correct charge? A) Ca2+ B) K- C) Nº D) He3+