In which step of the scientific method is information obtained through the senses? a. drawing conclusions b. making observations c. analyzing data d. revising a hypothesis

Answers

Answer 1

Hello There,

The answer is:

B. making observations

Hope this help have a great day:)

Answer 2

The step of the scientific method in which information is obtained through the sentence is making observations (option B).

What is the scientific method and what steps does it involve?

The scientific method is a standardized method used to understand natural phenomena by testing hypotheses. The first step in this method is to make observations, which means you gather information through senses such as sight, touch, and hearing, among others.

This step is followed by creating a hypothesis and then testing this hypothesis through a specific experiment. Based on this, the correct step is making observations (option B).

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Related Questions

What is the maximum number of electrons found in any energy level of the known elements? (Refer to the periodic table.) 112 32 86 92

Answers

The answer is 32 electrons.

Answer:

32 electrons are the maximum electrons found in the N shell.

Explanation:

According to the periodic table, Maximum number of electrons in any energy level of known element is 32 which is found in N shell.

Each shell can contain fixed number of electrons. The first shell is the K shell that holds two electrons, the second shell that is L shell which holds eight electrons(2+6), The third shell is M shell which holds 18 electrons(2+6+10), and the fourth shell is N shell which holds the maximum number of electrons that is thirty two(2+6+10+14) electrons. The general formula is [tex]2n^{2}[/tex] electrons.

The outermost shell is called the valence shell and the electrons present in these shell are called valence electrons. Each shell consists of one or more subshells, and each subshell consists of one or more atomic orbitals.

Plants are able to produce special chemicals at the right time and place.

True
or
False

Answers

TRUE its glucose if they have sunlight

Hi There,

The answer is:

True

Hope this helps have a great day :)

Victoria has a crate of vegetables that weighs 100 newtons. She exerts a force of 100 newtons to lift the crate with a pulley. What’s the mechanical advantage in this situation?
A. less than 1
B. equal to 1
C. equal to 0
D. more than 1

Answers

Simply put, MA = Force Out / Force in. That's the way it is usually stated. The force out is normally what you need to move. The force in is what you need to supply to get the force out. Most machines will give you an MA of more than 1. Some (like your arm) will give you less than 1 and others (like this one) will give you exactly one.

This one is frictionless, otherwise it would slip into less than one if it had friction.

Answer B


Answer:

Mechanical advantage in this situation is equal to 1.

Explanation:

The mechanical advantage of a simple machine gives a relationship between the input force applied to the output force. Mathematically, it is given by :

[tex]MA=\dfrac{F_o}{F_i}[/tex]

Where

[tex]F_o\ and\ F_i[/tex] are output force and input force

In this case, the weight of the crate of vegetables is 100 N

Force exerted by her to lift the crate with a pulley is 100 N

The mechanical advantage in this situation is given by :

[tex]MA=\dfrac{100}{100}=1[/tex]

So, the mechanical advantage in this situation is equal to 1. Hence, the correct option is (b) "equal to 1".          

Will carbon and hydrogen atoms most likely form an ionic bond or a covalent bond?

Answers

In most cases, carbon shares electrons with other atoms (usual valence of 4). This is because carbon typically bonds with elements which have a similar electronegativity. Examples of covalent bonds formed by carbon include carbon-carbon, carbon-hydrogen, and carbon-oxygen bonds

answer is covalent bond because carbon has 4 valence electron and shared them hence it is a covalent bond.

What’s the name of this element and what is the reactivity?

Answers

I know it's chlorine because it have 17 dots which means it has 17 protons but I don't know the reactivity

what factor distinguishes a metallic bond from an ionic bond or a covalent bond

Answers

The answer to this question is:

The mobility of electrons.

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Answer:

The ionic bond occurs between two different atoms (metal and nonmetal), while the covalent bond occurs between two equal atoms (nonmetals),

Another difference between these is that the covalent bond is an electron compartment, while in the ionic bond there is an electron transfer.

Metal bonding occurs when metals are combined with each other. Metal atoms need to give up electrons to reach the configuration of a noble gas. In this case, the metals lose the valence electrons and an electron cloud forms between the positive nuclei.

in the reaction C5H8+____ O2= 8H2O+5CO2

Answers

I don't think that the whole question is posted here, but if you are looking for a way to balance this equation, I may have the answer. I believe the balanced equation is C5H8+9O2=4H2O+5CO2. If you need the reaction type, the answer is combustion. Hope this helps you.

How many molecules of carbon monoxide are in 10 mL at STP

Answers

 The number  of  carbon monoxide that  are in 10 ml at STP  is 2.68 x 10²⁰  molecules

 calculation

Step 1 :  convert 10 ml to L

convert 10 ml to L = 10/1000 =0.01 L

Step 2: find the moles of CO at STP

That is at STP  1  mole  = 22.4 L

                           ?moles = 0.01 L

by cross  multiplication

= {0.01 L x 1 mole)/22.4 L} =4.46 x 10⁻⁴  moles


Step 3 ; find the  number of   molecules of Co  using the Avogadro's law constant

that  according to Avogadro's  law  1  moles = 6.02 x 10²³

                                                  4.46 x 10⁻⁴ moles =? molecules

by cross multiplication

= {(4.46 x 10⁻⁴  moles) x( 6.02 x 10²³  molecules) / 1 mole}  =2.68 x 10²⁰  molecules


Clary ran 20 miles in four hours. What was her average speed?

Answers

5 miles per hour

20/4=5

5mph because running 20 miles in four hours can easily be divided into 5.

A repetition of properties occurs when elements are arranged in order of increasing atomic number.

Answers

This is known as modern periodic law

According to this repetition of properties occurs when elements are arranged in order of increasing atomic number.

This law was proposed by Mendleev.

Previously the periodic law was that the properties are repeated with atomic mass.


Final answer:

The periodic law, which emerged in the 20th century, suggests that properties of elements repeat periodically when arranged by their atomic numbers. This is depicted in the periodic table, where elements are ordered by their atomic numbers in rows and columns, grouping elements with similar properties. The periodic table thus facilitates the prediction of element behavior.

Explanation:

The repetition of properties in elements, when arranged in order of increasing atomic number, is best described by the periodic law. This law states that the properties of elements are periodic functions of their atomic numbers. The periodic table, where this law is visibly demonstrated, organizes elements in increasing order of their atomic numbers in horizontal rows (periods) and vertical columns (groups).

Atoms with similar properties within this table are grouped in the same column. Each atomic box typically contains the element's symbol, atomic number, average atomic mass, and possibly its name. The periodic mapping of elements through atomic numbers rather than atomic masses emerged in the twentieth century and its modern version is widely accepted across the world today.

Since the periodic table's organization is based on shared properties among elements, it provides an efficient system for predicting the behavior of an element. Therefore, it becomes simpler to understand why elements in the same group have similar characteristics, for instance, why the metallic character increases as we move down a group.

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what is the name for B2(SO4)3

Answers

Answer:

The chemical formula B2(SO4)3 represents boron sulfate.

What substance cannot be broken down by chemical change

Answers

Potassium is the simplest form of matter and therefore can not be broken down by chemical change.

When 2.5000 g of an oxide of mercury, (HgxOy) is decomposed into the elements by heating, 2.405 g of mercury are produced. Calculate the empirical formula.

Answers

In the given question,

HgxOy (2.50 g) = xHg (2.405 g) + yO

Here, mass of oxygen = 2.50 - 2.405

= 0.095 g

The moles of O₂ = 0.095 / 16 = 0.00594 moles

Moles of Hg = 2.405 / 200.60 = 0.01198 moles

Thus, the ratio of Hg : O is,

0.00594 : 0.01198 or 1 : 2

As the ratio is 1 : 2, thus, the empirical formula is Hg₂O

what did theodor schwann do??? for the cell theory (what is the theory)

Answers

He concluded that all tissues are made up of cells.

Theodor Schwann, along with Matthias Jakob Schleiden, is credited with the formulation of the Cell Theory in 1839, which postulates that all living things are comprised of cells, the cell is the essence of biological structure and function, and that new cells are produced from the division of existing cells.

Theodor Schwann, a renowned zoologist, together with botanist Matthias Jakob Schleiden, contributed to one of the fundamental concepts in biology known as the Cell Theory. After extensive observation and research, they proposed that cells form the elementary building blocks of all living organisms and that all life is cellular in nature. This discovery laid the groundwork for modern biology and emphasized the universal importance of the cell as the basic structural, functional, and biological unit of all living organisms. Schwann's pivotal work highlighted that the cell is not merely a random assortment of matter, but a complex and dynamic unit vital for life. Further contributions by Rudolf Virchow, who added the idea that new cells can arise only from other pre-existing cells, completed the robust framework of the theory that continues to underpin biological research and understanding to this day.

I need help with balancing equations I'm doing homework and idk what to do here can you give me the answers please lol

Answers

It's pretty easy to balance equations! Basically you want to make sure that the number of each compound is equal on both sides of the arrow.

For example number one is

Fe + H2SO4 -> Fe2(SO4)3 + H2

A 3 in front of H2SO4 because there's a subscript of 3 on the right side.

Then a 3 in front of H2 because of the previous step.

Then add a 2 in front of Fe because of the 2 subscript in Fe2(SO4)3

Then add a 1 in front of Fe2(SO4)3 because you already have an equal number of each element.

2Fe + 3H2SO4 -> 1Fe2(SO4)3 + 3H2

I hope this explanation helps! You should really do your homework because practice is everything when it comes to chemistry. You'll need to know how to do it for exams.  

Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) → 2Li3N (s) In a particular experiment, 4.00-g samples of each reagent are reacted. The theoretical yield of lithium nitride is ________ g.

Answers

Answer: 6.71 g

Explanation: [tex]6Li(s)+N_2(g)\rightarrow 2Li_3N[/tex]

[tex]{\text{no of moles}}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

[tex]{\text {moles of lithium}}=\frac{4g}{6.914g/mol}=0.578moles[/tex]

[tex]\text{moles of nitrogen}=\frac{4g}{28g/mol}=0.143moles[/tex]

Limiting reagent is the reagent which limits the formation of product. Excess reagent is one which is in excess and thus remains unreacted.

Thus lithium is the limiting reagent and nitrogen is the excess reagent.

As can be seen from the balanced chemical equation,  6 moles of lithium reacts with 1 mole of nitrogen to give 2 moles of lithium nitride.

Thus 0.578 moles of lithium react with 0.096 moles of nitrogen.

6 moles of lithium give = 2 moles of lithium nitride

Thus 0.578 moles of lithium give=[tex]\frac{2}{6}\times {0.578}=0.19moles[/tex] of lithium nitride.

Mass of lithium nitride [tex]Li_3N={\text {no of moles}}\times {\text {Molecular mass}}[/tex]

Mass of lithium nitride[tex]Li_3N[/tex]=[tex]{0.192moles}\times {34.83g/mol}=6.71g[/tex]


Answer: 4.02

Explanation:

-- 4.00 g Li x   1 mol Li   x   2 mol LiN   x   20.948 g LiN   = 4.02 g LiN

                      --------------     ----------------       ---------------------

                      6.941 g Li        6 mol Li              1 mol LiN

-- 4.00 g N2 x   1 mol N2   x   2 mol LiN   x   20.948 g LiN   = 5.98 g LiN

                          --------------     ----------------       ---------------------

                       28.014 g N2      1 mol N2           1 mol LiN

Some characteristics of each of the four states of matter are given in the table below.


States of Matter
State Are Particles Charged? Space Between Particles
1 No Very Low
2 Yes High
3 No High
4 No Low

Which state of matter does State 4 represent?
A. Gas
B. Liquid
C. Plasma
D. Solid

Answers

Matter can be classified into four states:

1) Solid: This state is composed of uncharged particles that are held together very closely in a regular arrangement by strong intermolecular forces of attraction.  

2) Liquid: Like solids, this state is also composed of uncharged particles. However, compared to the solids these lie farther apart  and are held by relatively weaker forces

3) Gas: In this state, the interacting particles are uncharged and have a lot of space between them to move freely.

4) Plasma: This is the fourth state of matter composed of highly charged particles which are far apart from each other and possess high kinetic energies.

Based on the given characteristics:

In State 4 the particles are uncharged with a relatively low separation between them. This corresponds to the liquid state.

Ans: B

It's a Liquid! Sorry if it's too late!

give 2 examples of energy transformation that occur when making toast in a toaster oven

Answers

When making toast in toast oven, the following energy transformation occur

a) electric energy is converted to heat energy which heat up the filaments of toaster, which helps in roasting of toast.

b)the heat energy is transferred to bread or toast

Final answer:

When making toast in a toaster oven, energy transformations occur from electrical energy to thermal energy, and from thermal energy to radiant energy.

Explanation:

When making toast in a toaster oven, two examples of energy transformation that occur are:

Electrical energy to thermal energy: The electrical energy from the power source is transformed into thermal energy when the toaster oven heats up the heating elements inside.Thermal energy to radiant energy: The thermal energy produced by the heating elements is transformed into radiant energy in the form of infrared radiation, which then heats up the bread slices and transforms them into toast.

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Given a mixture of sand and water, state one process that can be used to separate water from the sand

Answers

use filtration because sand isn't soluble in water.

Filtration is the process used to separate water from sand in a heterogeneous mixture, utilizing filter paper to allow water to pass through while retaining the sand particles.

One process that can be used to separate water from sand is filtration. This technique is used to separate a heterogeneous mixture of a solid and a liquid. When you have a mixture of sand in water, you can pass this mixture through a filter paper. The water will flow through the filter paper, while the sand particles are caught by the filter, thus separating the two components.

Filtration keeps the physical properties of the substances intact as it is a mechanical means of separation, requiring no chemical process. The sand remains as sand, and the water remains as water after the filtration process. This is a simple yet effective method to use if you need to separate solid materials from liquids, such as in the case of a sand and water mixture.

is a sodium cation smaller or larger than a sodium atom

Answers

A sodium cation is smaller than a sodium atom.

Hopefully this is right...

The answer to (3.540)x(0.0065)x(401) should have ____.
A.four decimal places
B. Two significant figures
C. Four significant figures
D. Two decimal places

Answers

B. Two significant figures


Your final answer can only have as many significant figures as the number that has the least amount of significant figures in it, which is (0.0065)

Final answer:

The result of the multiplication should have two significant figures since the number with the least number of significant figures involved in the calculation is 0.0065, which has two significant figures. option B

Explanation:

The question is asking how many decimal places or significant figures the result of the multiplication (3.540) × (0.0065) × (401) should have. According to the rules of significant figures, the answer should have the same number of significant figures as the measurement with the fewest significant figures.

In this case, that is the number with two significant figures, which is 0.0065. Therefore, the final answer should also have two significant figures.

Additionally, it's noted that the number 0.0065 would be expressed as 6.5 × [tex]10^{-3}[/tex] in scientific notation, which confirms it has two significant figures. It is important to calculate it completely to generate an accurate answer with proper significant figures.

pls help me with this

Answers

The answer is detached earlobes so it's

D) AA

AA detached earlobe is 100% right

how to distinguish a solution of sodium sulphite from a solution of sodium sulphate in the lab

Answers

We have to distinguish a solution of sodium sulphite from a solution of sodium sulphate in the laboratory.

Solution of sodium sulphite is acidified with dilute HCl and to that when few drops of barium chloride (BaCl₂) solution is added, white precipitate is formed. The white precipitate is soluble in HCl.

To this solution 2 drops of iodine (I₂) solution is added and brown colour of iodine is discharged as I₂ gets reduced to HI.

The reactions involved in case of sodium sulphite is are:

Na₂SO₃ + BaCl₂ = BaSO₃ ↓ + 2NaCl

                         (white precipitate)

BaSO₃ + 2HCl = BaCl₂ + H₂SO₃

H₂SO₃ + I₂ + H₂O = H₂SO₄ + 2HI

On the other hand, solution of sodium sulphate is acidified with dilute HCl and to that when few drops of barium chloride (BaCl₂) solution is added, white precipitate is formed. The white precipitate of BaSO₄ is formed which is insoluble in HCl.

Na₂SO₄+ BaCl₂ = BaSO₄ ↓ + 2NaCl

                        (white precipitate)

Demand decreases and competition increases are factors that cause a shift in the quantity supplied (true or false)

Answers

Answer is: true.

Demand decreases and competition increases decrease the quantity supplied.

Quantity supplied is the quantity of a commodity that producers are willing to sell at a particular price at a particular point of time.

Quantity demanded is the quantity of a commodity that people are willing to buy at a particular price at a particular point of time.

Quantity demanded can change at the same price depending upon factors like recession, changes in the taste of the consumer.

Competition is rivalry between two or more economic groups.

what is the relstionship between a mutatation and gene

Answers

A mutation is known to be a natural process in which the DNA sequence is changed in a living organism. Genetic variation is the change in both alleles and genes. Both throughout and amongst the pop.

Answer:

D

Explanation:

A bald eagle's average speed is about 50 km/h. About how long would it take an eagle to fly 1 kilometer? A. 1 second B. 1 minute C. 1 hour D. 1 day

Answers

B. About 1 minute. We can solve this a few different ways and it mostly depends on how you want to go about it. First, we set up the equation as:

distance traveled (x) = time traveled (y)

Since the eagle is going 50 km/hr, we can substitute these variables in.

50 kilometers = 1 hour

Now, neither of these numerical values help us get to the answer, because we want to figure out:

1 kilometer traveled = ?? time traveled.

From the original equation we know to be true, 50 km = 1 hr, we can divide both sides by 50 to convert 50 kilometers to 1 kilometer, and of course, we have to keep the equation balanced, so we divide 1 hr by 50 as well.

50/50 km = 1/50 hr

Solve to:

1 km = 0.02 hr

This is closer to a minute than any other answer when you convert 0.02 hours to minutes (roughly one minute and 12 seconds).
Final answer:

If a bald eagle flies at 50 km/h, then it would take about 1.2 minutes to fly 1 kilometer. Therefore, the closest answer is B. 1 minute.

Explanation:

If an eagle flies at an average speed of 50 km/h, it means that in 1 hour, the eagle would cover 50 kilometers. To find out how long it would take the eagle to fly 1 kilometer, we have to divide the total time for its average (1 hour, or 60 minutes) by the total distance it can cover (50 kilometers).

So, 60 minutes divided by 50 kilometers equals 1.2 minutes. Thus, it would take the eagle approximately 1.2 minutes to fly 1 kilometer. Therefore, the answer is B. 1 minute (rounded off).

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Which of the following is the best definition of a scientific theory?Help me plz

Answers

A scientific theory is a well tested explanation of a natural phenomenon.

Assign oxidation numbers to each element in this compound. NO

Answers

Answer:

NO ---> N +2 and O -2

Explanation:

Oxidation numbers are assigned to the elements of a compound to keep a track of the number of electrons each atom has.

Here we have a compound NO (Nitrogen Oxide). The Nitrogen is assigned an oxidation number of +2 while Oxygen in this compound is assigned an oxidation number of -2.

So the algebraic sum of the oxidation numbers of the elements in the compound NO is equal to zero.

Answer:

+2, -2

Explanation:

As per the rule of assigning oxidation number, the oxidation number of O atom is -2. The sum of the oxidation number of a neutral compound is zero. Let us assume x to be the oxidation number of N.  

x + (-2) = 0

x – 2 = 0

x = +2  

Therefore the oxidation of N in NO is +2 and and the oxidation of O in NO is -2 respectively.

Which type of eye wash station must be checked and flushed most often

Answers

stand up eye wash station


Answer:

The answer is: When a foreign substance, usually irritating, penetrates the eyes, and for people with sensitive eyes.

Explanation:

An eyewash liquid, or eyewash liquid system is a liquid, usually a saline solution, used as an emergency or safety mechanism in laboratories and industrial plants as an aid to eye rinsing, s when a foreign substance, usually irritating, penetrates in them.

These eye drops can be beneficial for people with sensitive eyes and can provide relief from the side effects of painful sensation.

The answer is: When a foreign substance, usually irritating, penetrates the eyes, and for people with sensitive eyes.

what is our ultimate source of energy on earth






what is our ultimate source of energy on earth

Answers

The sun is our ultimate source of energy, silly!

Final answer:

The ultimate source of energy on Earth is the sun, which powers life and processes through nuclear fusion. Its energy supports photosynthesis and is stored in fossil fuels, while modern solar technology enables us to harness this energy directly.

Explanation:

The ultimate source of energy on Earth is the sun. This massive celestial body fuels virtually all processes and life forms on our planet. Through a process called nuclear fusion, the sun converts hydrogen into helium, releasing vast amounts of energy that travel to Earth as sunlight. This energy is critical for photosynthesis, the process by which plants produce food, thereby supporting the food chain and various ecosystems. Besides, the sun's energy is stored in fossil fuels like coal and petroleum, which are remnants of ancient plants and animals.

Although these fossil fuel resources are finite and will eventually deplete, the sun represents an essentially unlimited supply of energy. Modern solar technology, including photovoltaic cells, harnesses this sunlight directly to produce electricity, offering a renewable and sustainable alternative to fossil fuels. Solar energy's challenge lies in efficiently capturing and converting it to meet global energy demands.

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