Answer:
12C + 14H₂ + O₂ = 2C₆H₁₃OH .
Explanation:
2,3-dimethyl-1-butanol
= CH₃-CH(CH₃)-CH(CH₃)-CH₂OH.
Molecular formula = C₆H₁₃OH .
= C₆H₁₄O
12C + 14H₂ + O₂ = 2C₆H₁₃OH .
Answer:
7.38 g/cm³ is the density of the metal
Explanation:
In a Face-centered cubic unit cell you have 4 atoms. Also, the edge length is √8×r (r is radius of the atom).
To solve this problem, we need first to calculate the volume of the unit cell and then, with molar mass calculate the mass of 4 atoms. As density is the ratio between mass and volume we can obtain this value.
- <em>Volume of the unit cell</em>
Volume = a³
a = √8×r
(r = 198x10⁻¹²m)
a = 5.6x10⁻¹⁰ m
Volume = 1.756x10⁻²⁸ m³
1m = 100cm → 1m³ = (100cm)³:
1.756x10⁻²⁸ m³× ((100cm)³ / 1m³) =
<h3> 1.756x10⁻²² cm³ → Volume of the unit cell in cm³</h3><h3 />
- <em>Mass of the unit cell:</em>
<em>There are 4 atoms of gold:</em>
4 atoms × (1mol / 6.022x10²³ atoms) = 6.64x10⁻²⁴ moles of gold
As 1 mole weighs 195.08g:
6.64x10⁻²⁴ moles of gold × (195.08g / mol) =
<h3>1.296x10⁻²¹g is the mass of the unit cell</h3><h3 />
- <em>Density of the metal:</em>
1.296x10⁻²¹g / 1.756x10⁻²² cm³ =
<h3>7.38 g/cm³ is the density of the metal</h3>
Answer: 249 grams
Explanation:
The balanced chemical equation is :
As water is present in excess , it is called as excess reagent and ethylene is the limiting reagent.
According to stoichiometry:
1 mole of ethylene produces = 1 mole of ethanol
Thus 5.40 mole of ethylene produces =
mole of ethanol
Mass of ethanol = 
Thus 249 g of ethanol are produced from 5.40 mol of ethylene
Potential energy, because it is stored in the basic building block of all living organisms called cells and is only released when necessary for energy consuming work.
