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gavmur [86]
3 years ago
15

Based on the equation, determine what happens to the frequency if the period were to change from 0.2 seconds to 0.5 seconds. A)

It would invert. B) It would decrease. C) It would increase. Eliminate D) It would not change.
Chemistry
1 answer:
Elan Coil [88]3 years ago
7 0

Frequency can be defined as the number of times an event occurs within a unit time. In the context of waves for example, frequency refers to the number of waves that pass through a point in a certain amount of time.

Mathematically, the frequency (f) is related to the time period (T) as-

f = 1/T

SI Unit of frequency is Hertz (Hz)

In the given example:

When T = 0.2 s;  f = 1/0.2 = 5 Hz

When T = 0.5 s; f = 1/0.5 = 2 Hz

As T increases, f decreases

Ans: B) It would decrease

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Is sodium benzoate soluble in NaOH, NaHCO3
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When 7.80 mL of 0.500 M AgNO3 is added to 6.25 mL of 0.300 M NH4Cl, how many grams of AgCl are formed?
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Answer:

The answer to your question is 0.269 grams of AgCl

Explanation:

Data

[AgNO₃] = 0.50 M

Vol AgNO₃ = 7.80 ml

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Vol NH₄Cl = 6.25 ml

mass of AgCL

Balanced reaction

                 AgNO₃(aq)  +  NH₄Cl(aq)   ⇒   AgCl (s) + NH₄NO₃ (aq)

Process

1.- Calculate the moles of AgNO₃

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moles = Molarity x volume

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2.- Calculate the moles of NH₄Cl

moles = 0.30 x 0.0063

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3.- Calculate the limiting reactant

The proportion of     AgNO₃(aq)  to  NH₄Cl(aq) is 1 :1, then, we conclude that the limiting reactant is NH₄Cl(aq), because there are less amount of this reactant in the experiment.

4.- Calculate the moles of AgCl

                     1 mol of NH₄Cl  ---------------- 1 mol of AgCl

              0.00188 mol of NH₄Cl ------------- x

                     x = (0.00188 x 1) /1

                     x = 0.00188 moles of AgCl

5.- Calculate the grams of AgCl

molecular mass of AgCl = 108 + 35.5 = 143.5 g

                         143.5 grams of AgCl -------------- 1 mol

                         x -------------------------------------------0.00188 moles of AgCl

                          x = (0.00188 x 143.5) / 1

                          x = 0.269 grams of AgCl

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