Calculate the speed of sound wave with a frequency of 20hz and a wave length of 3.00m

1 answer:

7 0

Wavelength is the distance of one frequency wave peak to the other and is most commonly associated with the electromagnetic spectrum.[1] Calculating wavelength is dependent upon the information you are given. If you know the speed and frequency of the wave, you can use the basic formula for wavelength. If you want to determine the wavelength of light given the specific energy of a photon, you would use the energy equation. Calculating wavelength is easy as long as you know the correct equation.

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What experimental method has allowed scientists to estimate atomic and ionic radii?

KIM [24]

The meaning of the atomic radius is a large portion of the normal internuclear separation of an atom. It isn't conceivable to deal with one atom. In any case, here internuclear remove does not mean measurement of a solitary particle but rather it implies the separation between the core of two atoms of a similar component.

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3 years ago

How is aluminum an example of extensive<br> property?

Marrrta [24]

Answer:

If the property depends on the amount of matter present, it is an extensive property. The mass and volume of a substance are examples of extensive properties; for instance, a gallon of milk has a larger mass and volume than a cup of milk.

Explanation:

3 0

3 years ago

Consider 2H2 + O2 → 2H2O. To produce 1.2 g water, how many grams of H2 are required? Report to the correct number of significant

Elden [556K]

Answer:

0.133 mol (corrected to 3 sig.fig)

Explanation:

Take the atomic mass of H=1.0, and O=16.0,

no. of moles = mass / molar mass

so no. of moles of H2O produced = 1.2 / (1.0x2+16.0)

= 0.0666666 mol

From the equation, the mole ratio of H2:H2O = 2:2 = 1:1,

meaning every 1 mole of H2 reacted gives out 1 mole of water.

So, the no, of moles of H2 required should equal to the no, of moles of H2O produced, which is also 0.0666666 moles.

mass = no. of moles x molar mass

hence,

mass of H2 required = 0.066666666 x (1.0x2)

= 0.133 mol (corrected to 3 sig.fig)

3 0

3 years ago

If 30mL of 0.5M KOH is needed to neutralize 2M HCl, what was the volume of the acid?

defon

The equation for the reaction between KOH and HCl is as follows
KOH + HCl ---> KCl + H2O
the stoichiometry of KOH to HCl = 1:1
the number of KOH moles reacted = 0.5 mol /1000 cm³ * 30 cm³
= 0.015 mol
the number of HCl moles reacted = number of KOH moles reacted
therefore HCl moles reacted = 0.015 mol
the molarity of HCl is 0.2 mol/dm³
0.2 mol of HCl in - 1000 cm³
Therefore volume required for 0.015 mol = 1000 cm³ / 0.2 mol * 0.015 mol
= 75 cm³
Therefore 75 cm³ of HCl is required

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3 years ago

9. Which of the following concentrations has units of moles of solute per liter of solution?

11Alexandr11 [23.1K]

The best answer for this is A) I’m pretty sure it is

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3 years ago