please help me out with this I WILL GIVE BRAINLIEST!!

You have to pick a element corresponding to what the sentence says, like for example it give you three element options and it would say, pick the smallest atom and that element would be the awnser! ​

Heating a substance causes molecules to speed up and spread slightly further apart, occupying a larger volume that results in a decrease in density. Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density.

From: www.middleschoolchemistry.com

Answer:

they are called isotopes

Answer:

solar flares

Explanation:

We have that  The outward transportation of sun rays by the rising of hot plasma and sinking of cooler plasma is Known as

Option D

From the question we are told

In the outer layer of the sun, energy is transported outward by the rising of hot plasma and sinking of cooler plasma. This transfer is known as __

Generally

When the sun give off Heat energy it does this by the rising of hot plasma and sinking of cooler plasma  

This Process is defined by scientist around the world as Solar flares and this

is the reason why the rays if the sun reaches earth.

Therefore

The outward transportation of sun rays by the rising of hot plasma and sinking of cooler plasma is Known as

Solar flares

Option D

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Answer:

C-watering flowers with dirty dishwater

Explanation:

Answer:

D

Explanation:

A pie chart (or a circle chart) is a circular statistical graphic, which is divided into slices to illustrate numerical proportion. ... While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented

titsssss is the answerr mateeee

A:The top of the Ramp

Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\ [/tex]

From the question

mass = 257.3 g

volume = 250 cm³

We have

[tex]density = \frac{257.3}{250} \\ = 1.0292[/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

-The Atomic Radius of an element is the distance between the center of an atom

-nucleus and its outermost, or valence electrons. ... These changes are caused by the interaction between the positive charge of the protons

- nucleus and the negative charge of all the atom's electrons.

Answer: 5.248

Explanation: 0.53/0.1010 = 5.24752475248, and round to the thousandths.

Answer:

sulfur

hydrogen

iodine

oxygen

strontium

Explanation:

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.

In general, the size of an atom will decrease as you move from left to the right of a certain period.

Order of increasing atomic radius:

O < H < S < I < Sr

The atomic radius measures the separation between an atom's nucleus and its farthest electrons.

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Answer:

20.82

Explanation:

Answer:

The absorbance of the solution is 0.21168.

Explanation:

Given that,

Wavelength = 500 nm

Molar absorptivity = 252 M⁻¹ cm⁻¹

Number of moles = 0.00140

Volume of solution = 500.0 mL

Length = 3.00 mm

We need to calculate the molar concentration

Using formula of the molar concentration

[tex]C=\dfrac{N}{V}[/tex]

Where, N = number of moles

V = volume

Put the value into the formula

[tex]C=\dfrac{0.00140}{0.5000}[/tex]

[tex]C=0.0028\ M[/tex]

We need to calculate the absorbance of the solution

Using formula of absorbance

[tex]A=\epsilon C l[/tex]

Put the value into the formula

[tex]A=252\times0.0028\times0.300[/tex]

[tex]A=0.21168[/tex]

Hence, The absorbance of the solution is 0.21168.

The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 3 .00 mm pathlength cell, is 0.212.

First, we will calculate the molarity of the compound, which is equal to the moles of solute divided by the liters of solution.

[tex]M = \frac{0.00140mol}{0.5000L} = 0.00280 M[/tex]

Then, we will convert 3.00 mm to cm using the conversion factor 1 cm = 10 mm.

[tex]3.00 mm \times \frac{1cm}{10mm} = 0.300 cm[/tex]

Finally, we will calculate the absorbance of the compound using the Beer–Lambert equation.

[tex]A = \epsilon \times b \times C[/tex]

where,

[tex]A = \epsilon \times b \times C = \frac{252}{M.cm} \times 0.300 cm \times 0.00280 M = 0.212[/tex]

The absorbance of a compound, with a molar absorptivity at 500 nm wavelength of 252 M⁻¹ cm⁻¹, prepared by dissolving 0.00140 moles of a solute in enough water to make a 500.0 mL solution, measured in a 3 .00 mm pathlength cell, is 0.212.

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Answer: electronegativity,

Explanation:

Answer:

The answer is true!

Explanation:

Answer:

sugar and oxygen and nutrients

Explanation:

Blood brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body.

Answer:

cannot be used to produce energy in reactors.  

Explanation:

Currently, there is no reactor that can allow the use of nuclear fusion, although nuclear plants use nuclear fission reactors.

Nuclear fusion happens when thousands of atoms collide with each other when they are in the midst of extreme conditions of literature and pressure. This collision causes the atoms to fuse, creating another element. The process releases amounts of light and heat, promoting a high release of energy. This whole process occurs without the release of CO2 into the atmosphere, without the release of toxic waste and without the risk of explosions, which makes nuclear plants have a strong interest in building a reactor to use this type of energy. For this reason, scientists from different countries have collaborated with each other on a project called Iter, which seeks to build a reactor and achieve the first reaction in 2025.

because without the extra wheels the vehicle would be to heavy and not be able to support the extra weight thus the vehicle would be useless hope this helped brainlies plz

Answer:

These organelles are like the organs in a human and they help the cell stay alive. Each organelle has it's own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA. ... All of the cell's organelles must work together to keep the cell healthy.

Explanation:

These organelles are like the organs in a human and they help the cell stay alive. Each organelle has it's own specific function to help the cell survive. The nucleus of a eukaryotic cell directs the cell's activities and stores DNA. ... All of the cell's organelles must work together to keep the cell healthy.

Answer:

3.6 gallons are equal to 56 cups

Answer:

C

Explanation

Because My teacher told me that for an example Florida is hot but in Central America is cold or hot and you don’t need a jacket. I don’t remember much

The Central America is near the equator could explain the above statement.

Equator is an imaginary line that passes through the centre of the globe at 0 degrees latitude and at equal distance between the North and South Poles.

Some countries of Central America are situated near the equator. The places near equator have little seasonal variation. These places have same amount of daylight and darkness throughout the year and remain warmer year round. These places near the equator have an alternating dry and rainy seasons.

Hence, we can conclude that option C is the answer.

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Answer:

approx 17.1429 days rounded up = 18days

Explanation:

400÷70 =5.7143 × 3 = 17. or rounded up = 18days

A scientific law is the description of an observed phenomenon. The explanation of a phenomenon is called a scientific theory.

Answer: 22: C

              23: A

              24: A

              25: D

              26: B              

Explanation: I hope that this helped :)

Answer:

22) b. stainless steel.

23) c. they are all substances.

24) b. a compound can only be separated into its components by chemical means.

25) a. substances are compounds, mixtures are not.

26) b. capitalized

extra: not 100 percent sure of 25

Answer:

C.. one enegry level..

Answer:

6.67 %

Explanation:

Given that,

Measured height of a small lamp, l = 32 cm

Actual height, l' = 30 cm

We need to find the percent error of the student's measurement. Percent error is given by :

[tex]\%=\dfrac{|l-l'|}{l'}\times 100[/tex]

Putting all the values, we get :

[tex]\%=\dfrac{|32-30|}{30}\times 100\\\\\%=\dfrac{2}{30}\times 100\\\\\%=6.67\%[/tex]

So, the percent error of the student's measurement is 6.67 %.

Answer:

b  is constant

Explanation:

The half-life of a radioisotope is constant throughout its life cycle.

Half-life is the time taken for half of the radioactive nuclei to disintegrate.

Every radionuclide has its characteristic half-life and it is independent of the number of radioactive atoms.

Therefore, the most ideal statement about half-life is that it is constant.