An element's atomic number is 81. how many protons would an atom of this element have? protons

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Convert .347 kilometers to miles show your work