<u><em>Ponds and rivers are two types of . . . . freshwater ecosystems</em></u>
Producer. Hope this helps!
Answer: The students should take 49.67 g acid acetic in benzene solution. With significant digits 4.967X10 g.
Explanation: If 220 g solution 30.2% w/w acetic acid has 66.44 g acid acetic (220 g solution * 30.2%), 49.67 g solution 30.2% acetic acid has 15 g acetic acid (with a simple three rule, 15 g acetic acid*220 g solution/66.44 g acetic acid)
Answer:
A.
Explanation:
The sun unevenly hits the Earth, causing wind to form and move around the poles; never constant.
Part A: Given mass of NaCl * 1mol of NaCl/molar mass of NaCl = # of moles
17.45 g NaCl * 1 mole of NaCl /58.44 g NaCl = 0<em>.298 moles of NaCl</em>
Part B: First, let’s start with sodium, Na. To find the given mass of sodium, divide the given mass of NaCl (17.45)/the molar mass of NaCl(58.44) and multiply that by the molar mass of Na(22.99) to get the given mass of Na.
Given mass of Na * 1mol of Na/molar mass of Na= # of moles of Na.
6.864* 1mol Na/22.99 g Na=0.298 moles of sodium.
Repeat the above steps with chlorine.
Given mass of Na or Cl*1mol of Cl/molar mass of Cl = # of moles Cl.
10.58* 1mol Cl/ 35.45 g of Cl= <em>0.298 moles of chlorine.</em>
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Good Luck :)
Btw sry for answering so late.