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3 years ago

The period of an osciller is 2.34 minutes. What id the frequency of this oscillator in hertz?

Chemistry

1 answer:

AleksAgata [21]3 years ago

5 0

Explanation:

Given parameters

Period = 2.34minutes

Unknown:

Frequency of the oscillator = ?

Solution:

Frequency is the number of waves that passes through a point at a given time. It is the inverse of period which is the time it takes for a wave to pass through a medium:

F = $\frac{1}{T}$

F is the frequency

T is the period

To solve this, convert the period to seconds:

2.34minutes to seconds:

1 min = 60seconds

2.34 = 60 x 2.34 = 140.4s

F = $\frac{1}{140.4}$ = 0.007hz or 0.007s⁻¹

Learn more:

frequency brainly.com/question/5882803

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Answer:

Sodium chloride is an ionic salt that completely dissociates in water.

Explanation:

Sodium chloride in water dissociates according to the equation.

NaCl (aq) → Na + (aq) + Cl- (aq)

While water stays in balance according to the equation

2H2O (l) ⇄ H3O+(aq) + OH-(aq).

By dissociating the solute in the solvent, the water molecules pick up the sodium cations as well as the chloride anions to break the bonds in the salt crystals and thus produce the dissolution

If the ions are analyzed separately, we see that Na + interacts with water, so it would be producing sodium hydroxide, releasing protons.

If the reaction goes in the sense of products, the Na + would increase the concentration of [H +], however being a neutral salt the pH does not vary from 7, so the reaction would never go in the sense of products, but only reagents. That's why as the sodium hydroxide is a strong base, it only promotes the formation of water and the cation.

Na+ + H2O ← NaOH + H+

The same situation occurs with chloride, since no matter how much you want to form hydrochloric acid, it dissociates by promoting the formation of water plus the corresponding anion. Na + and Cl- act as too weak conjugate acid and base, so the reaction would never go in the direction of products

Cl- + H2O ← HCl + OH-

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Considering the activity series given below for metals and nonmetals, which reaction will occur?

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10. A toy car travels 100 cm in 20 seconds traveling west. What is the velocity of the toy car? O 5cm/s 50 cm/s 5 cm/s west 50 c

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<h2>I hope it helps plz let me know if it is right or wrong.</h2>

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Use bond enthalpy values to calculate the enthalpy change for the following reaction. Then, label if the reaction is endothermic

Mila [183]

Based on the bond energies given, the enthalpy change for the reaction of is -33 kJ and the reaction is exothermic.

<h3>What is the change in bond energy of a reaction?</h3>

The change in bond energy of a reaction is calculated using the formula below:

change in bond energy = sum of energies of bonds broken - sum of energies of bonds formed

A reaction is exothermic if the change in bond energy is negative.

A reaction is endothermic if the change in bond energy is positive.

Given the bond enery values above:

sum of energies of bonds broken = 4 × C-H + Br-Br

sum of energies of bonds broken = 4 × 413 + 193 = 1845 kJ

sum of energies of bonds formed = 3 × C-H + C-Br + H-Br

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Thus;

change in bond energy = 1845 - 1878 = -33 kJ

The reaction is exothermic because the change in bond energy is negative.

Therefore, the enthalpy change for the reaction of is -33 kJ and the reaction is exothermic.

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