Answer: 4.5165 *10^-23 moles Carbon
Explanation:
There are 6.022*10^23 atoms in a mole.
Therefore, there would be 6.022*10^-23*0.75 atoms in 0.75 moles of Carbon.
= 4.5165 *10^-23 moles Carbon
Answer:
3.6mol Li
Explanation:
To get the amount of moles from the mass we divide the mass by the molar mass.
25g ÷ 6.941g/mol = 3.6mol Li
Answer:
Group 8A
Explanation:
This is because the elements in Group 8A is stable, what I mean is this elements have the maximum number of electrons in there last orbit so they dont need to form any compund with any other element in the periodic table.
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Answer:
Mass of copper oxide: 10g
Mass of copper: 8.882g
Mass of oxygen: 1.118g
<u> Cu</u> <u>O</u>
8.882 1.118
Divide by 
8.882÷63.5 1.118÷16
0.14 0.07
Divide by the lowest number 0.14/0.07 0.07/0.07
2 1
Check the ratio now, Cu has 2 atoms and O has 1 atom .
The formula is 
All energy can generally be considered to be either kinetic energy or potential energy<span>. </span>Some specific forms of energy<span>, </span>such as electrical<span>, </span>magnetic, and gravitational energy<span>, </span>can operate in the space around objects and affect other objects that come near<span>. So, the correct answer is B, I believe. :)
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