What are the most common metric units used in science?

What Are The Most Common Metric Units Used In Science?

Answers

Answer 1

Answer its a

Explanation:


Related Questions

How many grarns would 3 moles of carbon dioxide (CO2) weigh? (round to the
nearest whole number)
Your answer

Answers

Mass of CO₂ = 132 g

Further explanation  

A mole is a number of particles(atoms, molecules, ions)  in a substance

This refers to the atomic total of the 12 gr C-12  which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles  

Can be formulated :

N = n x No

N = number of particles

n = mol

No = 6.02.10²³ = Avogadro's number

mole also can be formulated :

[tex]\tt n=\dfrac{mass}{MW}[/tex]

moles of CO₂ = 3

mass of CO₂(MW=44.01 g/mol) :

[tex]\tt mass=mol\times MW\\\\mass=3\times 44.01\\\\mass=132.03~g\approx 132~g[/tex]

What do the superscripts in an electron configuration represent?

Answers

Answer: number of electron in respective sub shell or orbital

Explanation:

In an electron configuration, the superscripts (written as numbers above the orbital symbols) represent the number of electrons present in each orbital. They indicate the distribution of electrons among different energy levels and sublevels within an atom.

What are superscripts?

Superscripts are characters or numbers that are positioned slightly above the normal line of text. They are typically smaller in size and are used to indicate various types of information or formatting in written text.

The superscripts are determined based on the rules of filling electron orbitals, such as the Pauli exclusion principle and Hund's rule. These rules govern the arrangement of electrons in the orbitals according to their energy levels and sublevels.

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A reaction is found to have an activation energy of 108 kj/mol. If the rate constant for this reaction is 4. 60 × 10-6 s-1 at 275 k, what is the rate constant at 366 k?.

Answers

The rate constant at 366K is 0.58 s⁻¹.

Ea = 108 kJ/mol = 108000 J/mol; an activation energy of a reaction

T₁ = 275 K

k₁ = 4.60 × 10⁻⁶ 1/s; the rate constant at 275 K

T₂ = 366 K

R = 8.314 J/Kmol

k₂ = ?; the rate constant at 366 K

Arrhenius equation: ln(k₁/k₂) = Ea/R (1/T₂ - 1/T₁)

ln(4.60 × 10⁻⁶s⁻¹/k₂) = 108000 J/mol/8.314 J/Kmol × (1/366K - 1/275K)

k₂ = 0.58 s⁻¹

For all chemical reaction some energy is required and that energy is called activation energy (energy that needs to be absorbed for a chemical reaction to start).

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A 25.0 mL sample of 0.100 M lactic acid (HC3H503, Ka = 1.4 E-4) is titrated with 0.100 M NaOH solution. Calculate the pH of the resulting
solution after 0.0ml of NaOH have been added

Answers

I’m a bit confused too

True or False: A polymer is a complex molecule made from smaller,
repeating molecules bonded together.

Answers

The answer is True. Monomers are the complete opposite. Poly = more than one.

You are on a road trip to San Francisco. You drove 200 miles in 3 hours, and then stopped for lunch for
30 minutes. After lunch, you traveled 150 miles in an hour and a half. What was your average speed
for this trip? SHOW YOUR WORK!
a. Calculate the average speed including the time spent for lunch.
b. Calculate the average speed without the lunch stop

Answers

Answer:

Explanation:

a)

Average speed is total distance over change in time.

So

total distance=(200+150)

=350

total time=(3+0.5+1.5)

=5

350 km/5 hours

70km/hour

Therefore:

70 km/h is the average speed

b)

total distance=(200+150)

=350

total time=(3+1.5)

=4.5

350/4.5

=approx. 77.77 km/hour

Therefore:

77.77/hour is the average speed

Don't know if you round but uh yeah

What is the charge of Aluminum?
O +3
0 -3
OO
O +1

Answers

Answer:

+ 3

Explanation:

please mark me brainliest

+3 good luck!
I hope this helps!

Given the density of 1.2 g/mL and a volume 7.8 mL. What is the mass? Round to the nearest 0.1.

Answers

Answer:

here is my answerrrrrrr

Which types of changes must follow the law of conservation of mass? (2 points)
O Both physical and chemical changes
O Neither physical nor chemical changes
O Only physical changes
O Only chemical change

Answers

Both Physical and chemical changes.

what is the Transfer of energy from one object to another through direct contact?​

Answers

Answer:]

Conduction is the transfer of energy from one molecule to another by direct contact. This transfer occurs when molecules hit against each other, similar to a game of pool where one moving ball strikes another, causing the second to move.

Explanation:

water interacts with polar substances like –oh groups but not with non-polar substances like methyl (−ch3) or ethyl groups (−ch2). using this information, select the molecules that will easily dissolve in water based on polarity not on size. check all that apply.

Answers

CH3OH and CH3CH2CH2OH will easily dissolve in water based on polarity not on size.

What is Polarity ?

In chemistry, polarity describes the type of bonds that exist between atoms. Atoms share electrons when they join forces to form chemical bonds. When one of the atoms applies a stronger attractive force to the bond's electrons, a polar molecule is created.

For instance, the chlorine atom is slightly negatively charged while the hydrogen atom in hydrogen chloride is slightly positively charged.

Water is polar due to its form even though its molecules have no net charge. The molecule's hydrogen ends are positive, and its oxygen ends are negative. Water molecules are drawn to other polar molecules and to one another as a result.

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Help with number 4??????????? Asap

Answers

Answer:

it's A I think

Explanation:

hope u pass on this homework

Define "Petrifying Well".​

Answers

Answer:

Explanation:

A petrifying well is a well which gives objects a stone-like appearance. If an object is placed into such a well and left there for a period of months or years, the object acquires a stony exterior.

What is incorrect in the structure? Check all that apply. The middle hydrogen is surrounded by 4 electrons. Oxygen is surrounded by 8 electrons. The middle hydrogen is bonded to 2 elements. There are too many electrons in the final structure.

Answers

Answer: The middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.

Explanation: I just did this question and got the correct answers.

The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure are correct.

For better understanding let's explain the Lewis structure

Lewis Structure is simply showing or the representation of a molecule that tell use how the valence electrons are putt in place (arrange) among the atoms in the molecule.

From the above we can therefore say that the answer The incomplete points about the structure H—H-O: is that the middle hydrogen is surrounded by 4 electrons, the middle hydrogen is bonded to 2 elements, and there are too many electrons in the final structure, is correct.

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If two wave crests overlap each other and one has an amplitude of 5 and the other has an amplitude of 3, what is the interference that is created?

Answers

Answer:

The interference is 8

Explanation:

Can someone explain a method to help convert different units of measurement to another? For example, centimeters to kiloliters? My teacher uses a chart method but it's a little confusing. Can anyone help?

Answers

Answer:

Compare your two units. The two units must measure the same thing.

For example, in the problem "convert 2 inches into centimeters," both inches and centimeters measure length. If your units measure two different things (like length and weight), you can't convert between them.

or

Look up the conversion. Before you can do the math, you need to know how much larger one unit is than the other.If the conversion you find has many decimal places, round to the nearest significant digit. If you don't know what a significant digit is, round to the second or third digit.

For example, if you need to convert 2 inches to centimeters, you need to know that 1 inch = 2.54 centimeters.

Explanation:

Hope this will help

please make my answer as brainelist

why is our use of electric power increasing?

Answers

Answer: leaving it on

Step by step

A marble is given potential energy by being placed at Location W. When the marble released, it rolls down the track.
At which location does the marble have maximum kinetic energy?
A Location w
B Location X
C Location Y
D Location 2

Answers

Answer:the answer is c , location Y

The location at which the marble have maximum kinetic energy is location Y.

What is conservation of energy?

Conservation of energy states that total energy of the system doen not change else the one form of energy is converted into another form within the system.

In the given diagram it is mention that potential energy of marble is highest at the location W as potential energy is directly proportional to the height. But when the marble rolls down it attains the kinetic energy and potential energy decreases.

According to the law of conservation at point Y potential energy is minimum, so that kinetic energy becomes maximum at this point.

Hence at location Y marble have maximum kinetic energy.

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The kinetic energy of an object can be determined using the equation , where is the kinetic energy, is the mass, and is the speed of the object. What is the mass of an object moving at a speed of 12 that has 36 J of kinetic energy?

Answers

Answer:

0.5kg

Explanation:

Given parameters:

Speed of the object  = 12m/s

Kinetic energy  = 36J

Unknown:

Mass of the object  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

     K.E = [tex]\frac{1}{2}[/tex] m v²  

 Insert the parameters and solve;

    36  =  [tex]\frac{1}{2}[/tex] x m x 12²

     36  = 72m

       m  = 0.5kg

how many electrons does cobalt lose/donate?

Answers

Answer:

Cobalt lose 3 electrons and donate 12 electrons.

Explanation:

In the periodic table,cobalt has nine electrons .It has lost 3 electrons,so it is only six left.Once it forms the complex,each ammonia donates a pair of electrons.

Which stage of the cell cycle results in two identical cells?
mitosis
cytokinesis
interphase
metaphase

Answers

Mitosis should be the correct answer :)

Answer:

B.

Explanation:

186km at 3:00 the speed limit is 65km/h

Answers

He will arrive at the second city on time

Using the formula for calculating speed expressed as:

Distance = Speed * time

Given the following parameters

Speed = 65km/hr

Time = 3 hours (from noon to 3PM)

Get the distance covered by Isaiah;

Distance = 65 * 3

Distance = 195km > 186km

Since the distance covered by Isaiah is greater than the distance from one city to another city, hence he will arrive at the second city on time

What is Speed?

The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

Therefore,

186km at 3:00 the speed limit is 65km/h

He will arrive at the second city on time

Using the formula for calculating speed expressed as:

Distance = Speed * time

Given the following parameters

Speed = 65km/hr

Time = 3 hours (from noon to 3PM)

Get the distance covered by Isaiah;

Distance = 65 * 3

Distance = 195km > 186km

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Why is the Law of Conservation of Mass a law, rather than a theory?

A. It has more scientific evidence supporting it
B. It has both independent and dependent variables
C. It has been tested with the latest laboratory balances, which are very accurate
D. It describes a repeatedly observed relationship, but it does not offer an exclamation

Answers

Answer: During a chemical reaction, matter cannot be created nor destroyed, matter can change form through physical and chemical changes, but through any of these changes, matter is conserved; even though the matter may change from one form to another, the same number of atoms exists before and after the change takes place.

Explanation: <3

Is the substance in the chart a metal or non metal? Explain.

Answers

Answer:

Nonmetal

Explanation:

A substance in the chart is a nonmetal because nonmetals are not water soluble, they are poor conductors of heat and electricity and they do not have high melting points like metals.

what is the purpose of making sodium extract for the detection of hetero elements in organic compond?​

Answers

In order to detect hetero elements, these have to be converted into their ionic forms. This is done by fusing the organic compound with sodium metal. The ionic compounds formed during the fusion are extracted in aqueous solution and can be detected by simple chemical tests.

What are some molecular compounds that we use in everyday life and their products?

Ex: Kirkland water - dihydrogen monoxide; H2O

Answers

Answer:

Water. Chemical Formula: H2O.

Table Salt. Chemical Formula: NaCl.

Sucrose (Sugar) Chemical Formula: C12H22O11.

Soaps. Chemical Formula: RCOO–Na, Where R is a long chain of carbon atoms ranging from 16-18 in number.

Toothpaste. Chemical Formula: CaCO3 or NaF.

Explanation:

What is the difference between elements and compounds?

Answers

An element is a material that consists of a single type of atom. A compound consists of two or more types of elements, held together by covalent or ionic bonds.

Use the portion of the periodic table shown at the bottom to answer the questions.

Part 1: Name two elements that have the same properties as magnesium (Mg).
Part 2: Determine the number of protons, electrons, and neutrons present in an atom of potassium (K). Explain how you determined your answer using complete sentences.

Answers

Answer:

Part 1 calcium and strontium have same properties as magnesium because all three are in same group.

Part 2 As atomic number of potassium is 19 so it contains 19 protons and 19 electrons because it is neutral

Potassium has 20 neutrons because its mass is 39

We can find neutron = atomic mass - atomic number

Explanation:

HELP PLEASE :((( Explain why helium filled balloons deflate over time faster than air filled balloons do?

Answers

Answer:

Because helium has more molecules trying to escape at faster rates

Explanation:

Answer:

helium filled balloons tend to deflate over time faster than air filled balloons do because, the average velocity of helium molecules is higher than that of molecules of any gas found in air, so helium escapes through the pores in the balloon more quickly.

Explanation:

after researching I found this and tried to respond as quickly as possible!! hope this helps but it has something to do with the molecules .

_______: a type of nebula in which stars form​

Answers

Answer:

Orion Nebula

Explanation:

That is an enormous cloud of gas and dust

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