There’s no one around and the breeze from the Ocean makes it cool
Answer:
D. one red straw and one green straw.
Answer:
B) 8.0 molecules.
Explanation:
- From the balanced equation: <em>3Cu + 8HNO₃ → 3Cu(NO₃)₂ + 2NO + 4H₂O,</em>
It is clear that 3.0 atoms of Cu react with 8.0 molecules of HNO₃ to produce 3.0 molecules of Cu(NO₃)₂, 2.0 molecules of NO, and 4.0 atoms of H₂O.
<u><em>Note that: </em></u>The no. of atoms and molecules is the same ratio to the no. of moles.
<u><em>Using cross multiplication:</em></u>
3.0 atoms of Cu produce → 2.0 molecules of NO, from the balanced equation.
12.0 atoms of Cu produce → <em>??? molecules of NO.</em>
<em>∴ The no. of molecules of NO produced </em>= (2.0 molecules)(12.0 atoms)/(3.0 atoms) = <em>8.0 molecules.</em>
Answer:
a chemical change is a change that changes the substance into a whole new substance.
Examples include: burning wood, a banana peel rotting, milk souring, and even your food/drinks digesting.
Empirical Formula = C20 H60 HG1 S1 O4 (numbers should be in subscript)
Percent Composition =
MG = 43%
S = 56.8%
