What does a control group show in an experimental investigation?

the effects that the scientists are causing by manipulating variables
how nature would act without manipulation by the researchers
why each part of a system is related to every other part
all parts of a system that scientists are controlling and changing

Answers

Answer 1
The answer is B.
Hope this helps
Answer 2

Answer:

its b

Explanation:


Related Questions

Ammonium sulfate, an important chemical fertilizer, can be prepared by the reaction of ammonia with sulfuric acid according to the following balanced equation:
2 NH3(g) + H2SO4(aq) → (NH4)2SO4(aq)

If a reaction vessel has 3.29 L of NH3 at 31.5°C and 22.7 atm, how many grams of H2SO4 are needed to completely react with it?

_________________ g H2SO4. Do NOT enter unit. Report your final answer with 3 SFs.

Answers

Answer:

Ammonia reacts with sulphuric acid to give the fertilizer ammonium sulphate.

Explanation:

Starting from position 3,5 go west 7 , then south 7, then east 4 what’s your ending point?

Answers

Answer:

-1, -2

Explanation:

West is left south is down east is right

what is the meaning between fission and fusion

Answers

Answer:

Both are nuclear reactions that produce energy,but the applications are not the same

Explanation:

Fission -is the spitting of a heavy,unstable nucleus into two lighter nuclei Fussion -is the process where two light nuclei combine together releasing vast amounts of energy.

Atoms contain positively charged protons and negatively charged electrons. Why does an ordinary atom have no charge?

Answers

Atoms contain positively charged protons and negatively charged electrons. The atoms contain the same number of protons and electrons so the positively charged protons balance out the negatively charged electrons. Therefore, an atom is electrically neutral because it has no charge.

To convert measurements in the metric system you can move the decimal point left or right why does this work?

Answers

Explanation:

Because when you move the decimal point once, it it equal to 10 and to convert in the metric system, you must multiply or divide by 10. For example, when converting 4 centimeters to millimeters, you can multiply by 10 to get 40 millimeters or you can move the decimal point to the right and add another 0 to get 40.

Answer:

when you move tne decmal point it alwase ads up to ten

Explanation:

PLZ HELP PLZ HURRY NO WRONG ANSWER PLZ ALSO WILL GIVE BRAINLIEST

An atom of an element contains 6 protons, 6 neutrons, and 6 electrons. An atom that is a different isotope of this element would contain —
A.
6 protons, 7 neutrons, and 6 electrons.


B.
6 protons, 6 neutrons, and 7 electrons.


C.
7 protons, 6 neutrons, and 6 electrons.


D.
7 protons, 7 neutrons, and 7 electrons.

Answers

Answer:

I dont lnow much about chemistry, but I believe it's either d or a. sorry if its wrong!

In lab, you measure out 24.25g of C2H4. How many atoms of H is this?

Answers

Answer:

anong sagot jan? d ko kasi alam ehhh penge sagot

We have unlimited wants but our resources such as time and money are limited. This concept is known as A. Scarcity B, Consumption C. Trade D. Currency

Answers

Answer:

Since human wants are unlimited, and resources used to satisfy those wants are limited - there is scarcity. Even in the US, one of the richest countries in the world, there is scarcity -- if we use our new definition of SCARCITY.

hope it helps

Which atom has the largest atomic radius

Answers

francium , in the Periodic table the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. making helium is the smallest element, and francium the largest.

boiling and melting points exploration

Answers

Answer:

Boiling- 212° F melting- 32°F

Explanation:

PLZ HELP HURRY PLZZZ

Answers

Answer:

alkali metals

Explanation:

s block elements are also called alkali metals

How many electrons should Nitrogen (N) have around its Lewis dot model?

Answers

Answer:

5

Explanation:

5 electrons Nitrogen (N) have around its Lewis dot model. Therefore, the correct option is option D among all the given options.

What is nitrogen?

Nitrogen (N), a nonmetallic element belonging to Periodic Table Group 15 [Va]. It is a colorless, flavorless, and odorless gas that makes up the majority of the atmosphere on Earth and is a component of all living things.

In terms of cosmic abundance, nitrogen is the sixth most abundant element. The main supply of nitrogen for trade and industry is the atmosphere of Earth, which contains 75.51 percent nitrogen by weight. Aside from nitrogen oxides and nitric acid, the atmosphere also includes variable tiny quantities of ammonia and ammonium salts. 5 electrons Nitrogen (N) have around its Lewis dot model.

Therefore, the correct option is option D.

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How many liters of soft drink are there in 5.25 qt?

Answers

Answer:

4.69 liters

Explanation:

I hope this helps.

The answer is 4.95L hope it helps

The volume of a sphere is given by the equation =4/33, where is the radius. Calculate the volume of a sphere with a radius of 345 pm in cubic meters.

Answers

Answer:

its 45 because of 49 og the

I need help on this, the question in here:

Answers

Answer:

The wheel size does not affect the speed of the skateboard.

Explanation:

This is true because Nikki's average time goes up while Lisa's goes down, so it depends on how hard they are pushing the skateboard with their foot.

✓7
Is it rational or irrational

Answers

Answer:

Irrational

Explanation:

:)

Answer:

It is irrational

Explanation:

Since 7 is a prime number, it has no square factors and its square root cannot be simplified.

write the molecular formula for the following compound.

Answers

Answer : The molecular formula of the compound is, [tex]C_8H_9O_3N[/tex]

Explanation :

Molecular formula : It is the representation of substance by the symbols and it denotes the number of atoms of each element present in the compound.

Now count the number of carbon, hydrogen, nitrogen and oxygen atoms present in the given compound.

As we see that in the given compound, there are 8 atoms of carbon element, 3 atoms of oxygen element, 1 atom of nitrogen element, 9 atoms of hydrogen element.

Thus, the molecular formula of the compound will be [tex]C_8H_9O_3N[/tex]

What do organs combine to form? organ systems cells tissues organisms

Answers

Answer:

the answer is {organisms}

Answer:

organisms

Explanation: I took the test

Which is a feature of a single replacement reaction?
Substance XYZ breaks down into X and YZ.
Substance G reacts with compound XY to form GY and X.
Substance X burns rapidly in the presence of oxygen.
Substance QR and GT exchange ions with each other.

Answers

Answer:

Its B

Explanation:

Because im just built different

The statement  featuring the single replacement reaction has been statement B.

The single replacement reaction has been defined as the reaction of the highly reactive element with the compounds, that results in the formation of the new compound with the replacement of the less reactive element.

The single replacement reaction can be given as:

G + XY [tex]\rightarrow[/tex] GY + X

In the reaction, G being more reactive than X has been able to displace X and forms bond with Y. Thus, statement  featuring the single replacement reaction has been B.

For more information about the single replacement reaction, refer to the link:

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Compounds have the same properties as the elements they are made up of. Is it true or false

Answers

Answer:

compounds have the same properties the elementary are false.

Using the formula Q = m x ^T x Cp, solve for energy, and round your answer to the correct number of sig figs and show all work:

1) How much heat is absorbed by 1210. g water (Cp = 4.184 J/g*C) when it is heated from 20*C to 45*C

Answers

Answer:

Q = 126.5 kJ

Explanation:

Given that,

Mass, m = 1210 g

Specific heat of water, c =  4.184 J/g°C

Initial temperature, [tex]T_i=20^{\circ} C[/tex]

Final temperature, [tex]T_f=45^{\circ} C[/tex]

We need to find the heat absorbed by water. The formula that is used to find the heat absorbed is given by :

[tex]Q=mc\Delta T[/tex]

Putting all the values in it we get :

[tex]Q=1210\ g\times 4.184\ J/g^{\circ} C\times (45-20)^{\circ} C\\Q=126566\ J\\\\\text{or}\\\\Q=126.5\ kJ[/tex]

So, the amount of heat absorbed is 126.5 kJ.

ARE MINERALS man-made?

Answers

Answer:

no

their made from the earth

A block of metal has a mass of 85g and a volume of 6.35mL. What is the density?

Answers

Answer:

13.39

Explanation:

Density is g/mL divide the grams by the mL

Use the PhET simulation to identify what happens to the concentrations of a dilute Drink mix mixture or a pure Drink mix solution for the following scenarios. A pure Drink mix solution can be obtained by draining all the mixture, then adding Drink mix to the container as a Solution (radio button in the upper right area of the simulation). Note that the Concentration meter can be placed toward the bottom of the container or in the stream of the Drink mix. Drag the appropriate items to their respective bins.

Answers

Hello user, you did not add a picture of an attachment to enable me help you solve this problem. Please check the attachment I added i believe it is the question that needs to be solved.

Explanation:

1. In the first column

INCREASE CONCENTRATION: these are the items that needs to be placed in this bin

a. Add drink mix solid to a diluted mixture of drink mix in pure water

b. Add drink mix solution to a diluted mixture of drink mix in pure water

c. Add drink mix solid to pure drink mix solution

d Evaporate water from a diluted mixture of drink mix in pure water

e Evaporate water from pure drink mix solution

2. The items below are what should be placed in this bin,DECREASE CONCENTRATION:

a. Add water to a diluted mixture of drink mix in pure water

b. Add water to pure drink mix solution

3. These items here should be placed here. DOES NOT AFFECT CONCENTRATION:

a. Add pure drink mix solution to pure drink mix solution

b. Drain the pure drink mix solution

c. Drain the diluted mixture

Where can you find most of Earth's liquid freshwater?

Answers

Answer:

Where can you find most of Earth's liquid freshwater?

Explanation:

Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps.

Hope that helped, i also have snap if you need me.

Over 68 per cent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 per cent is found in groundwater. Only about 0.3 per cent of our freshwater is found in the surface water of lakes, and rivers.

What is the per cent of the water on this earth?

The Earth is a watery place. About 71 per cent of the Earth's surface is water-covered, and the oceans hold about 96.5 per cent of all Earth's water.

The majority of Earth’s fresh water is stored in underground aquifers.

Aquifers are layers of sedimentary formations such as sandstone and fractured hard rocks where water after infiltration from soil reaches and fill the interstitial spaces.

Aquifers are huge in size in basins and contain a huge amount of underground water of fresh quality.

So, over 68 per cent of the freshwater is present on Earth.

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Which is the most effective action for people to take in order to reduce greenhouse gas emissions? O taking the bus more often O using a car powered by fuel cells O driving a car only five days a week O using a car that travels farther on each gallon of gas​

Answers

One of the most effective ways to reduce greenhouse gases is using a car powered by fuel cells.

What are greenhouse gases?

The term greenhouse gases refers to those gases that lead to a rise in the temperature of the earth due to the re-radiation of infrared rays towards the surface of the earth.

It is very important to take vital steps in order to prevent the emission of these gases. One of the most effective ways to reduce greenhouse gases is using a car powered by fuel cells.

Learn more about greenhouse gases: https://brainly.com/question/14131369?

Answer:

Using a car powered by fuel cells

Explanation:
B On Edge

Use the periodic table to determine the electron configuration for aluminum (Al) and arsenic (As) in noble-gas notation.

Al:

[Ar]3s23p1

[He]2s22p63s23p1

[Ne]3s23p1

[Ne]3s23p2

Answers

Answer:

C

Explanation:

[Ne]3s23p1

Answer:

C

Explanation:

WILL GIVE BRAINLEIST
For this assignment, you will develop a model that shows a roller coaster cart in four different positions on
a track. You will then use this model to discuss the changes in potential, kinetic, and thermal energy of
the cart as it moves along the track.

Answers

Answer:

This should help :)

Explanation:

The cart has a lot of potential energy, little kinetic energy, and little thermal energy when it is in position A. The kinetic energy and potential energy both rise as the cart moves towards position B, while the thermal energy rises as thermal energy from the track is transmitted to the cart through friction

What is Kinetic energy ?

Kinetic energy, which may be seen in the movement of an object, particle, or group of particles, is the energy of motion.

The cart has a lot of kinetic energy, little potential energy, and little thermal energy after it reaches position C. The cart has some thermal energy and a high potential energy at point D.

It also has a low kinetic energy. Gravity, momentum, and friction are all connected with potential energy, kinetic energy, and thermal energy, respectively.

Position A is when the potential energy is at its highest, and its kinetic energy is at its peak in position C and at its lowest in position A, whereas thermal energy is at its peak in position B and at its lowest in position A.

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What is the term for an object's strength of motion?
O Momentum
O Acceleration
O
Force
O
Velocity

Answers

I'm pretty sure its momentum

Active and inactive volcano in philipines?

Answers

355 volcanoes in the Philippines are inactive.

24 volcanoes are active

Answer:

TAAL ACTIVE

MAOUNT BALUGAO INACTIVE

Explanation:

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