Answer:
The answer is B. Genetic engineering can provide genuine benefits to mankind if there is a balance with ethical issues.
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>
A disease that targets any organism in the population with similar traits because more of the population live off of organisms if the organisms were to decrease then most of the population would decrease as well.
Its Phosphorus with a negative 3 charge.
Answer:
1) Eₐ = 100.3 kJ/mol
2) k = 7.62×10⁻⁴ M⁻¹s⁻¹
Explanation:
1) Make an Arrhenius graph by plotting ln(k) on the y-axis and 1/T on the x-axis (don't forget to convert temperature to Kelvin).
The slope of the line is equal to -Eₐ/R.
-Eₐ/R = -12065
Eₐ = 100,300 J/mol
Eₐ = 100.3 kJ/mol
2) Since we know the slope of ln(k) vs 1/T is -Eₐ/R, we can say:
-Eₐ/R = (ln(k₂) − ln(k₁)) / (1/T₂ − 1/T₁)
Plug in values and solve for k:
-(108,000 J/mol) / (8.314 J/mol/K) = [ln(k) − ln(1.0×10⁻³)] / [1/(35+273.15 K) − 1/(37+273.15 K)]
-12990 = [ln(k) + 6.91] / (2.09×10⁻⁵ K⁻¹)
-0.272 = ln(k) + 6.91
ln(k) = -7.18
k = 7.62×10⁻⁴ M⁻¹s⁻¹
