CHEMISTRY COLLEGE

A wavelength of 4.73 x 10-7 m, and a frequency of

Answers

Answer 1
Answer:

Answer:

Frequency =0.634×10¹⁵ s⁻¹

Explanation:

Given data:

Wavelength = 4.73×10⁻⁷ m

Frequency = ?

Solution:

Formula:

speed of light = wavelength× frequency

speed of light = 3×10⁸ m/s

Now we will put the values in formula.

3×10⁸ m/s = 4.73×10⁻⁷ m × frequency

Frequency = 3×10⁸ m/s /4.73×10⁻⁷ m

Frequency =0.634×10¹⁵ s⁻¹

s⁻¹ = Hz

Frequency =0.634×10¹⁵ Hz

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help asap What type of cell does the cheek cell represent, plant cell or animal cell? What did you see that let you know?

Answers

Answer:

The human cheek cell is a good example of a typical animal cell. It has a prominent nucleus and a flexible cell membrane which gives the cell its irregular, soft-looking shape.

How many grams of chloride are there in 256 g of magnesium chloride?

Answers

Given :

Mass of given magnesium chloride, m = 256 g.

To Find :

How many grams of chloride are there in 256 g of magnesium chloride.

Solution :

Molecular formula of magnesium chloride is MgCl_2.

Molecular formula of MgCl_2 is, M = 95.211 g/mol .

Mass of chlorine in 1 mol of MgCl_2  is , m = 35.5 × 2 = 71 g.

So, amount of chlorine in 256 gram MgCl_2 :

m =(71* 256)/(95.211)\n\nm = 190.90\ g

Hence, this is the required solution.

Choose all the answers that apply. Which of the following is true about the sun's radiation? A) It is long-wave.
B) It is short-wave.
C) 40 percent is reflected by the atmosphere.
D) 60 percent reaches Earth's surface.
E) None of the rays are harmful.

Answers

B. It is shortwave.....

Answer:

Your answers are B,C, and D

Explanation:

Because a and e are wrong it is these three.

Edit pls mark brainliest

5. As a sample of matter is heated, its particles *O A are unaffected
O B. move more quickly
O C. move more slowly
D. stop moving

Answers

Answer:

B. move more quickly

Explanation:

As a sample of matter is heated, we know that the particles begins to move more quickly.

This is because the temperature of a substance is directly proportional to the average kinetic energy of a system.

  • As the temperature increases, the body gains more kinetic energy
  • This is translated to the particles of the medium.
  • Then they begin to move quickly and very fast enough.

Final answer:

Upon heating a sample of matter, the particles tend to move more quickly. This is because the increase in temperature boosts the kinetic energy of the particles, thereby making them move faster.

Explanation:

When a sample of matter is heated, it causes the particles of the matter to move more quickly. This phenomenon is due to the increase in temperature, which leads to an increase in the kinetic energy of the particles. Kinetic energy refers to the energy that an object possesses due to its motion. Hence, as heat supplies energy, it causes atoms and molecules in a matter to move faster. As a result, solids expand and liquids and gases become less dense as their particles spread out to absorb the heat.

Learn more about Kinetic Energy here:

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A rock has a mass of 15 grams and a volume of 5 cm3 what is the density of the object

Answers

Answer:

The answer is

3.0 g/cm³

Explanation:

To find the density of a substance when given the mass and volume we use the formula

density = (mass)/(volume)

From the question

mass = 15 g

volume of rock = 5 cm³

The density of the substance is

density = (15)/(5)

We have the final answer as

3.0 g/cm³

Hope this helps you

Final answer:

The density of an object is calculated by dividing its mass by its volume. In this case, the rock's density is 3 g/cm3.

Explanation:

The process to determine the density of an object involves dividing its mass by its volume. Here, the rock has a mass of 15 grams and a volume of 5 cm3. Thus, the density can be calculated by the formula:

Density = Mass / Volume.

Plugging the given numbers into this formula results in:

Density = 15 grams / 5 cm3.

Therefore, the density of the rock is 3 g/cm3.

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In both industry and research there are often times when one particular component of a mixture needs to be separated from a solution. Maybe it is a rare metal that is dissolved in a mixture of minerals. Maybe it is a particular protein from lysed plant cells. If the desired component is volatile, distillation could be used. But if the goal is to separate ions in solution, fractional precipitation is preferred.a. True
b. False

Answers

Answer:

a. True

Explanation:

Distillation process is a process that is used to separate the components or the substances from the liquid mixtures by using selectively boiling and condensation.

While fractional precipitation is a process which separates the ions from solution based on the different solubilities.

Therefore, the answer is true.

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