The speed of light in a vacuum is 2.998 × 10 8 8 m/s. How long does it take for light to circumnavigate the Earth, which has a c
1 answer:
Answer:- 0.134 seconds
Solution:- The speed is given as and the circumference is 24900 miles which is same as the distance light have to covered. It asks to calculate the time required to cover this distance by the light.
Unit conversion is needed from miles to meters since the speed is given in meters per second.
1 mile = 1609.34 meters
Thus,
= 40072566 meters
Now,
Rearranged for time, that gives:
Inserting the values:
= 0.134 seconds
Hence, light would take 0.134 seconds to traverse the indicated distance. The answer without the unit is 0.134.
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Answer:
Explanation:
1. Molar concentration
Designate chloroform as C and acetone as A.
The molar concentration for C is derived from Moles of C per Litres of solution.
(a) Moles of C
We are assuming there are 0.187 moles of C.
This resolves that step.
(b) Litres of solution
Next, identify 0.813 moles of A.
(i) Mass of each component
(ii) Volume of each component
(iii) Volume of solution
Assuming mixing doesn't alter the total volume.
V = 15.08 mL + 59.70 mL = 74.78 mL
(c) Molar concentration of C
2. Molal concentration of C
Molal concentration is calculated as moles of solute per kilograms of solvent.
Total moles of C = 0.187 mol.
Mass of A = 47.22 g = 0.047 22 kg.
Response:
Here's my calculation
Clarification:
Assume the starting concentrations of H₂ and I₂ are 0.030 and 0.015 mol·L⁻¹, respectively.
We need to determine the initial concentration of HI.
1. We will need a chemical equation with concentrations, so let's compile all the information in one location.
H₂ + I₂ ⇌ 2HI
I/mol·L⁻¹: 0.30 0.15 x
2. Calculate the concentration of HI
3. Plot the initial values
The graph below visualizes the initial concentrations as plotted on the vertical axis.
