Answer: It minimizes fossil fuels and is a pollution-free mode of transport. Bokes reduce the need to build, servie and dispose cars.
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The statement that correctly summarizes the trend in electron affinity is the second option: it tends to be more negative across a period".<span> Electron affinity is the energy absorbed or released by a neutral atom when it absorbs an electron. The more negative the electron affinity the higher the affinity of the atom for an additional electron. So as the electronegativity trends to increase across a period, indicating that the atoms of the left side pull stronger the electrons, the fact that the electron affinity is more negative across a period tells that the atoms to the left accept better an additional electron.</span>
Answer:
1.23 × 10³ N
Explanation:
Step 1: Given and required data
- Mass of the person (m): 125 kg
- Acceleration due to the gravitational force (g): 9.81 m/s²
Step 2: Calculate the force acting between the Earth and a 125-kg person standing on the surface of the Earth
We will use Newton's second law of motion.
F = m × g
F = 125 kg × 9.81 m/s²
F = 1.23 × 10³ N
Percentage O: 69.54
Percentage N: 30.46
Dividing each percentage by the components molecular weight:
Oxygen: 69.54 / 16 = 4.35
Nitrogen: 30.46 / 14 = 2.18
Ratio of nitrogen to oxygen = 1 : 2
Empircal formula: NO₂
Mass of empirical formula = 46
Repeat units = 92 / 46 = 2
Molecular formula = N₂O₄
Answer:
Explanation:
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In this case, since the dilution processes are characterized by the decrease of the original stock solution by holding the moles constant and therefore modify the volume, for the described dilution we can write:
Whereas we are asked to compute the volume of the original solution; thus, we can solve for it as shown below:
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