Answer:

Explanation:
Assume that the volume of the stock solution is 1 L.
1. Mass of stock solution

2.Mass of NH₃

3. Moles of NH₃

4. Molar concentration of stock solution

5. Volume of stock needed for dilution
Now that you know the concentration of the stock solution, you can use the dilution formula .

to calculate the volume of stock solution.
Data:
c₁ = 14.89 mol·L⁻¹; V₁ = ?
c₂ = 0.500 mol·L⁻¹; V₂ = 600 mL
Calculations:

Answer:
7.68 × 10²⁴
Explanation:
Step 1: Calculate the mass of 1 molecule of the monomer CH₂CHCN
We will get the mass of the monomer by adding the masses of the elements.
mCH₂CHCN = 3 × mC + 3 × mH + 1 × mN
mCH₂CHCN = 3 × 12.01 amu + 3 × 1.01 amu + 1 × 14.01 amu = 53.07 amu
Step 2: Convert the mass of the monomer to grams
We will use the conversion factor 1 amu = 1.66 × 10⁻²⁴ g
53.07 amu × 1.66 × 10⁻²⁴ g/1 amu = 8.81 × 10⁻²³ g
Step 3: Calculate "n"
We will divide the mass of the polymer by the mass of the monomer.
n = 676.8 g / 8.81 × 10⁻²³ g = 7.68 × 10²⁴
Answer: D)The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut.
Explanation:
The distance from Earth and mass of ISS exert negligible gravitational force on the astronaut. Gravity is a very weak force and varies with mass and the inverse square of distance. The astronaut's distance from Earth and the relative small mass of ISS result in gravitational force near zero.
Pregunta en guglu ay te ayudara
Answer:C
Explanation:
It would be the most visually understandable.It would be easyer to understand what you are modeling.