Answer: It helps scientists access info more easily about the elements, in a more efficient and faster way. The periodic table is helpful in seeing atomic and chemical trends by seeing where they are placed on the table.
Explanation:
Atomic radii INCREASES when going DOWN a group because of more energy levels and DECREASES going ACROSS a group because of the increasing positive charge of the nucleus pulling in on the electrons.
The value of kb of cyclohexane in the given question is; kb = 2.82 °C/m
<h3>Understanding Molality of a Solution</h3>
Molality of solution = (Number of moles of C₆H₄Cl₂)/(Mass of Cyclohexane)
Now;
Number of moles of C₆H₄Cl₂ = Mass/molar mass = 2g/147 g/mol
Number of moles of C₆H₄Cl₂ = 0.0136 mol
Molality of solution = 0.0136/(22.5 * 10⁻³ kg)
Molality of solution = 0.6 m
Now, to find kb for cyclohexane, we will use the formula;
T_b(solution) - T_b(solvent) = kb × molality of solution
Thus;
82.39 - 70 = kb * 0.6
kb = (82.39 - 70)/0.6
kb = 2.82 °C/m
Read more about Molality of Solution at; brainly.com/question/10278982
Answer:
P(A or B)=0.6425
Explanation:
To find P(A or B), plug your values for A and B into the equation:
P(A or B)= P(A) + P(B) - P(A and B)
Due to constructive interference, we can predict that: C. the resulting wave would travel at 4.2 hertz.
<h3>What is constructive interference?</h3>
Constructive interference of a wave can be defined as a phenomenon through which two waves of the same frequency and phase combines to form a wave of higher magnitude.
This ultimately implies that, the constructive interference of a wave causes an increase in the amplitude or frequency of waves.
Due to constructive interference, we would have:
Wave = 3 + 1.2
Wave = 4.2 hertz.
Read more on constructive interference here: brainly.com/question/1451845
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<u>Complete Question:</u>
Jerimiah is studying Wave A and Wave B. Wave A is traveling at 3 hertz, and Wave B is traveling at 1.2 hertz. What can be predicted about the waves if they were to crash into each other?
