What are the effects of UV radiation from the sun when it is absorbed by the skin

Answer:

c

Explanation:

Answer:

Chemical Equation: (NH4)2S(aq) + 2KOH(aq) -> K2S(aq) + 2NH4OH(s)

Complete Ionic Equation: 2NH4^+(aq) + S^2-(aq) + 2K^+(aq) 2OH^-(aq) -> 2K^+(aq) + S^2- (aq) + 2NH4OH(s) 2NH4^+(aq) + OH^-(aq) -> NH4OH(s)

Explanation:

Answer:

A line spectrum is produced when the electron moves from one energy level to a lower energy level.

Answer:

Explanation:

...from one energy level to a lower energy level

Answer:

Bromine

Explanation:

Br2 is an oxidizing agent, Na is a reducing agent.

Answer:

Nuclear energy

I'm not sure ok.. Better ask some adult for making sure.

Answer:

A is the answer to your question

They usually have crystals since they are formed from lava

Answer:

7.85 g/cm³

Explanation:

Density is Mass/Volume

The mass is 212 grams

The volume is 27 cm³ (3 x 3 x 3 = 27)

212/27 = 7.851851852

We can estimate this to 7.85 g/cm³

Density is simply defined as the mass of a substance per unit volume of substance. It is expressed mathematically as:

[tex]Density = \frac{Mass }{Volume }[/tex]

To solve the question given above, we'll begin by calculating the volume of the iron. This can be obtained as follow:

Dimension = 3.0 cm by 3.0 cm by 3.0 cm

Volume = 3 × 3 × 3

Thus, the volume of the iron is 27 cm³

Finally, we shall determine the density of the iron as follow:

Mass of iron = 212 g

Volume of iron = 27 cm³

[tex]Density = \frac{Mass}{Volume } \\\\Density = \frac{212}{27}[/tex]

Therefore, the density of the iron is 7.85 g/cm³

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Answer:

Temperature decreases and density increases

Explanation:

Let us remember that density of a material increases as the temperature of the material decreases. So the cooler a material becomes, the denser it becomes also.

Between points B and C, the material rapidly cools down and the temperature decreases accordingly. This ultimately results in an increase in density since cooler materials are denser than hot materials.

Answer:

The noble gases(neon, helium, argon)

Explanation:

In the ground state, noble gas atom has a completely filled valence electron shell. Space makes up the majority of an atom.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense. In the ground state, noble gas atom has a completely filled valence electron shell.

Therefore, in the ground state, noble gas atom has a completely filled valence electron shell.

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Answer:

Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it.

When water is present in a sample of copper(II) sulfate it turns blue. It is still a dry solid, because the individual water molecules are trapped within the ionic lattice surrounding the copper(II) ions. Solutions of copper(II) sulfate are also blue.

This colour change can be used to detect the presence of water (or water vapour).

Answer:

Increasing your concentration of negative ions is a very important way to improve your health for a variety of reasons. They work to increase serotonin levels in your body, which improves mood and balances your mental health, helping combat depression and anxiety.

Explanation:

Answer:

I did this already

................

Answer:

Ooo points, You get teal, turquoise, and cyan :)

Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.

Answer:

Break apart

Explanation:

Decompose: to break down or cause to break down into component elements or simpler constituents.

Answer: % yield

=

actual yield

theoretical yield

⋅

100

%

So, let's say you want to do an experiment in the lab. You want to measure how much water is produced when 12.0 g of glucose (

C

6

H

12

O

6

) is burned with enough oxygen.

C

6

H

12

O

6

+

6

O

2

→

6

C

O

2

+

6

H

2

O

Since you have a

1

:

6

mole ratio between glucose and water, you can determine how much water you would get by

12.0

g glucose

⋅

1 mole glucose

180.0 g

⋅

6 moles of water

1 mole glucose

⋅

18.0 g

1 mole water

=

7.20

g

This represents your theoretical yield. If the percent yield is 100%, the actual yield will be equal to the theoretical yield. However, after you do the experiment you discover that only 6.50 g of water were produced.

Since less than what was calculated was actually produced, it means that the reaction's percent yield must be smaller than 100%. This is confirmed by

% yield

=

6.50 g

7.20 g

⋅

100

%

=

90.3

%

You can backtrack from here and find out how much glucose reacted

65.0 g of water

⋅

1 mole

18.0 g

⋅

1 mole glucose

6 moles water

⋅

180.0 g

1 mole glucose

=

10.8

g

Explanation:

Answer:no answer,

Explanation: but if the other dude see this can you re word Wht u said it’s hard to make sense of it

Answer:

ork out which of the displacement (S), initial velocity (U), acceleration (A) and time (T) you have to solve for final velocity (V).

If you have U, A and T, use V = U + AT.

If you have S, U and T, use V = 2(S/T) - U.

If you have S, U and A, use V = SQRT(U2 + 2AS)

Answer:

hydrogen and oxygen to form water

A "cell" might be a better name for the torch battery. A "battery" is a collection of connected cells. Another example of an electric cell is a lemon with two strips of different metals (for instance, zinc & copper) inserted into it. The correct option is B.

A primary cell in a dry-cell battery is one that cannot be recycled. Each dry-cell battery has a cathode and an anode for operation. Remote controls, clocks, and calculators are a few examples of modern-day items that employ dry-cell batteries.

Alkaline and lithium batteries are the two most typical types found in flashlights. A "dry" cell used in a torch has a finite lifespan.

Thus the correct option is B.

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The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.

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Answer:

Great Rapids White Water Rafting Company rents rafts for $125 per hour. Explain why the point, (0,0) and (1, 125) are on the graph of the relationship and what these points mean in the context of the problem. * 100 points

Explanation:

Answer:

The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.

The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.

Explanation:

Let suppose that helium gas inside the cylinder behaves as an ideal gas, the equation of state for the ideal gas is:

[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)

Where:

[tex]P[/tex] - Pressure, measured in atmospheres.

[tex]V[/tex] - Volume, measured in liters.

[tex]n[/tex] - Molar quantity, measured in moles.

[tex]T[/tex] - Temperature, measured in Kelvin.

[tex]R_{u}[/tex] - Ideal gas, measured in atmosphere-liters per mole-Kelvin.

If we know that [tex]V = 60\,L[/tex], [tex]n = 0.020\,mol[/tex], [tex]T = 304.65\,K[/tex] and [tex]R_{u} = 0.082\,\frac{atm\cdot L}{mol\cdot K}[/tex], then the pressured inside the cylinder is:

[tex]P = \frac{n\cdot R_{u}\cdot T}{V}[/tex]

[tex]P = \frac{(0.020\,mol)\cdot \left(0.082\,\frac{atm\cdot L}{mol\cdot K}\right)\cdot (304.65\,K) }{60\,L}[/tex]

[tex]P = 8.327\times 10^{-3}\,atm[/tex]

The pressure inside the cylinder is [tex]8.327\times 10^{-3}[/tex] atmospheres.

The value for R for this problem is 0.082 atmosphere-liters per mol-Kelvin.

Answer:

A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism. Plants also exhibit phototropism, or growing toward a light source. This response is controlled by a plant growth hormone called auxin.

Explanation: