Answer:
a) 5.4 * 10^-4 moles
b) 8.2 moles
c) 0.26 moles
d) 20.76 moles
Explanation:
a)Since 1 mole of a substance has 6.02 * 10^23 atoms
x moles is present in 3.25 x 1020 atoms of lead
3.25 x 1020 atoms of lead/6.02 * 10^23 atoms = 5.4 * 10^-4 moles
b) Since 1 mole of a substance has 6.02 * 10^23 molecules
x moles is present in 4.96 x 1024 molecules of glucose
x = 4.96 x 1024 molecules of glucose/6.02 * 10^23 molecules = 8.2 moles
c) Since 1 mole of a substance has 6.02 * 10^23 formula units
x moles is present in 1.56 x 1023 formula units of sodium hydroxide
x = 1.56 x 1023 formula units /6.02 * 10^23 = 0.26 moles
d) Since 1 mole of a substance has 6.02 * 10^23 ions
x moles is present in 1.25 x 1025 copper(ll) ions
x = 1.25 x 1025 copper(ll) ions/6.02 * 10^23 ions = 20.76 moles
Answer:
32.0 is the answer which is divide able to 65 or -85
Research for alternative energy sources have been positively affected, because of other reasons (excluding those EliteAnswers listed), such as:
1) Renewability: This means that resources are replaced as fast as they are used, meaning that they would not run out
2) Cleaner: Most alternative energy would not have the effect of polluting the earth after it is used, and may be easier to clean (if even need to)
hope this helps
16.00 grams of oxygen
since in one mole the mass would be the molecular mass, which is found on the periodic table
The given equation is follow,
<span> 2 Cl</span>₂<span> + 2 KI ⟶ __ KCl</span>₂<span> + I</span>₂
There are two Iodine atoms at left hand side of the equation and two at right hand side of the equation so Iodine is balanced.
There are four chlorine atoms at left hand side and two at right hand side. In order to balance chlorine atoms we will multiply KCl₂ on right hand side by 2. So,
2 Cl₂ + 2 KI ⟶ <u>2</u> KCl₂ + I₂
Now, the potassium atoms are same on both sides, i.e. two.
Result:
The missing coefficient in given equation is 2.
