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3 years ago

I WILL MARK BRAINLIEST If the number of crests that pass a point in a given time increases, what has decreased?

2 answers:

6 0

Wavelength decreases as frequency increases.
Taylor Swift was observing the amplitude of the waves as compared to the day before.

stira [4]3 years ago

5 0

Answer:

For 1: The correct answer is Wavelength.

For 2: The correct answer is Amplitude.

Explanation:

Wavelength is defined as the distance between two crests or two troughs.

Frequency is defined as the number of oscillations that occur in 1 second.

Amplitude is defined as the maximum displacement from its equilibrium position. It is the vertical distance from the crest to the equilibrium position of the wave.

Intensity of the wave is basically the energy of the wave and it is proportional to the square of the amplitude of the wave.

Speed of the wave the is defined as the distance traveled by a given point on a wave.

For 1:

As, the number of crests increases on a point which means that the number of oscillations increases and hence, the frequency increases.

Frequency is inversely proportional to the wavelength of the wave and therefore, increase in frequency will result in the decrease of wavelength.

Hence, the correct answer is Wavelength.

For 2:

When Taylor Swift stood knee deep in the ocean, she noticed that the waves were high as compared to the previous day, which means that the vertical distance of the wave has increased from its mean position.

Hence, the correct answer is Amplitude.

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How many molecules are in 3.6 grams of NaCl?

raketka [301]

Answer:

$\boxed{\text{None}}$

Explanation:

There are no molecules in NaCl, because it consists only of ions.

However, we can calculate the number of formula units (FU) of NaCl.

Step 1. Calculate the moles of NaCl

$\text{No. of moles}=\text{3.6 g NaCl}\times \dfrac{\text{1 mol NaCl}}{\text{63.54 g NaCl}} = \text{0.0567 mol NaCl}$

Step 2. Convert moles to formula units

$\text{FU} = \text{0.0567 mol NaCl} \times \dfrac{6.022 \times 10^{23}\text{ FU NaCl}}{\text{1 mol NaCl}}\\\\= 3.4 \times 10^{22} \text{ FU NaCl}$

There are $\boxed{3.4 \times 10^{22} \text{ FU NaCl}}$ in 3.6 g of NaCl.

6 0

3 years ago

If 2.00 moles of H₂ and 1.55 moles of O₂ react how many moles of H₂O can be produced in the reaction below?

jekas [21]

Answer:

2 mol H₂O

Explanation:

With the reaction,

2H₂(g) + O₂(g) → 2 H₂O(g)

1.55 moles of O₂ would react completely with ( 2*1.55 ) 3.1 moles of H₂. There are not as many moles of H₂, thus H₂ is the limiting reactant.

Now we calculate the moles of H₂O produced, starting from the moles of limiting reactant:

2.00 mol H₂ * $\frac{2molH_2O}{2mol H_2}$ = 2 mol H₂O

5 0

3 years ago

Balance the following redox equation and identify the element oxidized, the element reduced, the oxidizing agent, and the reduci

earnstyle [38]

The charge of Br changed from –1 to 0, therefore it is the element which is oxidized. Since it is oxidized then Br is also the reducing agent.

The charge of Mn changed from +4 to +2 therefore it is the element which is reduced. Since Mn is reduced, then MnO2 is the oxidizing agent.

The half –reactions are:

Br: 2Br --> Br2 + 2e-

Mn: MnO2 --> Mn2+

First balance oxygen by adding H2O:

MnO2 --> Mn2+ + 2H2O

Then balance hydrogen by adding H+ ions:

4H+ + MnO2 --> Mn2 + 2H2O

Then the appropriate electrons:

4e- + 4H+ + MnO2 --> Mn2 + 2H2O

Multiply the half-reaction of Br by 2 because the half-reaction of Mn has 4 electrons.

4Br --> 2Br2 + 4e-

Combine the two half reactions and cancel common factors:

4Br- + 4H+ + MnO2 --> 2Br2 + Mn2 + 2H2O

6 0

3 years ago

50 pts Plz help !!!! What is the physical state of matter of baking soda.

WITCHER [35]

Baking soda is a solid.

8 0

3 years ago

Read 2 more answers

Calculate the thermometer in an air-conditioned room reads 20.0°C what is the temperature of the room In degrees Fahrenheit and

maks197457 [2]

Answer:

A. 68°F

B. 293K

Explanation:

The temperature (celsius) = 20.0°C

A. Conversion of the temperature in celsius to fahrenheit.

This is illustrated below:

°F = 9C/5 + 32

C = 20°C

°F = 9C/5 + 32

°F = 9x20/5 + 32

°F = 36 + 32

°F = 68°F

B. Temperature (Kelvin) = temperature (celsius) + 273

Temperature (celsius) = 20°C

Temperature (Kelvin) = 20°C + 273

Temperature (Kelvin) = 293K

5 0

3 years ago