Chemistry High School

3. What is SI system? Why has SI system been developed? Give reasons​

Answers

Answer 1
It allows people in different places and different countries to use the same units, avoid mistakes and understand each other more easily. The common base 10 of all units makes it easier and has more accurate calculations that are made without cumbersome conversion factors.
Answer 2
This text is from my science textbook. Hope it helps you




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3. What Is SI System? Why Has SI System Been Developed? Give Reasons

Related Questions


A substance that conducts electricity, is malleable, ductile, and has luster would be classified as a

A) compound.
B) element.
C) metal.
D) nonmetal.

Answers

The answer is c , metal
The answer is C : Metal

What group will elements in the 7th column bond to?

Answers

Deez Neutz..............Group 1

an object has a mass of 57.6g . find the object's density, given that's it's volume is 40.25cm^3​

Answers

Answer:

The answer is 1.43 g/mL

Explanation:

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

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

From the question

mass = 57.6 g

volume = 40.25 cm³

We have

[tex]density = \frac{57.6}{40.25} \\ = 1.431055900...[/tex]

We have the final answer as

1.43 g/mL

Hope this helps you

Given: mass = 57.6 g, volume = 40.25 cm3
Unknown: density
Density = mass/volume
density = 57.6 g/40.25 cm3
density =1.43 g/ cm3

What is the mass of a hydrogen atom?​

Answers

Answer:

1.00784 u

Explanation:

Answer:

1.00784 u

Explanation:

hydrogen atomm

How do you make an atom of F become Ne?

Answers

Answer:

If atoms gain electrons, they become negative ions, or anions. ... A fluorine atom has nine protons and nine electrons, so it is electrically neutral. If a fluorine atom gains an electron, it becomes a fluoride ion with an electric charge of -

Explanation:

Answer:

Add and electron and a proton

Explanation:

You would have to add a proton and an electron to F to get it to be Ne

If this decay has a half life of 2.60 years, what mass of 72.5 g of sodium 22 will remain after 15.6 years

Answers

Sodium-22 remain : 1.13 g

Further explanation

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.  

Usually, radioactive elements have an unstable atomic nucleus.  

General formulas used in decay:  

[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{T/t\frac{1}{2} }}}[/tex]

T = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

half-life = t 1/2=2.6 years

T=15.6 years

No=72.5 g

[tex]\tt Nt=72.5.\dfrac{1}{2}^{15.6/2.6}\\\\Nt=72.5.\dfrac{1}{2}^6\\\\Nt=1.13~g[/tex]

Which of the following types of soil has the greatest permeability?

A. Loam

B. Sandy

C. Clay

D. Silty

​

Answers

Answer:

Sandy soil

Explanation:

Sandy soil has the greatest permeability of all soil types. It has a high amount of pore space and grain size.

Permeability is the ability of fluids to pass between the grains of a substance, here soil. It is usually a function of the size of the pore spaces and the grain size.

Sandy soils are usually made up of particles with sand-sized shapes and dimension. They have bigger and finer grains with little to no cement. This allows for a high level of permeability with no impediment to flow.Clay soil has very fine grain and with very low permeability. Silty soils have fair enough permeability and the permeability of loam straddles between that of sand and clay.

Permeability is very important for determining the quality of soils.

Please hurry :(
A whale has a calf and a bacteria replicates through cloning. Both of these are examples of what?

Answers

Answer:

Either growth and development or reproduction

Explanation:

Answer:

r e p r o d u c t i o n

Explanation:

In a one or two paragraph summary explain why Sodium light is Orange and Potassium light is lilac when placed in a flame.
Use the words: electron, quantum jump, ground state, orbitals, photons, emitting, absorbing, light spectrum, energy mass (words are not in order)

Answers

Answer:

?

Explanation:

In the first propagation step of the bromination of 2,3-dimethylbutane, the newly formed Br radicals react with the molecules of 2,3-dimethylbutane. Give the major products formed by the first propagation step including both organic and inorganic products. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. Include all free radicals by right-clicking on an atom on the canvas and then using the Atom properties to select the monovalent radical.

Answers

Answer:

See explanation

Explanation:

When the bromine free radical attacks 2,3-dimethylbutane, two free radicals may result. One of them is primary (formed by attack on then end -CH3 group) the other is secondary.

Recall that the order of stability of free radicals is tertiary > secondary > primary > methyl.

Hence the secondary free radical is more thermodynamically stable hence it is the major free radical formed in the first propagation step.

can someone call me and help me with chemistry
860-833-8822

Answers

Answer: okay

Explanation:

Answer:

What exactly do you want help with

Explanation:

According to kineric molecular theory which statement descrives the particles in a sample of an ideal gas

Answers

Answer:

According to the kinetic molecular theory, which statement describes the particles in a sample of an ideal gas? The motion of the gas particles is random and in a straight-line.

Explanation:

What are some uses we might have for standing waves?​

Answers

any waves traveling along the medium will reflect back when they reach the end.

I need help with this ASAP PLEASE!! WILL MARK BRAINLIEST!!
Write the following value in decimal form

8.99 x 10^-7

Answers

Answer:

0.000000899

Explanation:

8.99x10^-7

move the decimal to the left 7 times.

0.000000899

Answer:

0.000000899

Explanation:

.,.......,.........

Potential energy is based on an objects

A)gravity
B)mass
C)position
D)kinetic

Answers

Answer:

c

Explanation:

because potential energy is created with the position of a body when you pick up something the thing will have stored energy which is transferred from you so the stored energy is potential energy created by the position of a body that when you see over your head you scared of that thing not to bit you because it has stored energy if you see the thing already failed on the ground you wouldn't scared of that because the enery is already gone

Hope help you

Find the force of the mass is 6kg and the acceleration is 12 m/s/s

Answers

Answer:

72N

12m/s

Explanation:

f=ma

=6×12

=72N

a=f÷m

=72÷6

=12m/s

HELP ME ASAP PLEASE BIG POINTs ​

Answers

Answer:

1.cation

2.anion

Explanation:

the plus is always cation and the negative is anion

Answer:

1. cation

2. anion

Explanation:

A positive ion is always cation and the negative ion is anion

HELP PLEASE! There is a water-filled continental rift in Iceland. What type of plate boundary would cause this rift? *
A. convergent
B. divergent
C. transform

Lithospheric plates move because of the movement of the ___________________________ under them.
A. lower mantle
B. asthenosphere
C. outer core
D. inner core

Answers

1.A- convergent
2.A- lower mantle

Good Luck!!

Answer:

B. Divergent

The rift formed in the Divegent tectonic boundary between the North America and Eurasian Plates and is located now in Iceland (Im sorry im not good at explaining)

Write the following value in decimal form

2.2 x 10^2

Answers

I think that the answer is 22.44 if it it not Robyn sorry

Answer:

220

Explanation:

2.2 x 10^2

You just move the decimal two units to the right...

Hope this helps:)

i need some help all of this stuff is due soon

Answers

Answer:

A is one of them.

Is there more?

B and D if I'm not mistaken.

The lightning storm is just what you'd expect it to be, and the comb is collecting particles of what looks like paper?

Anyway, the rock and the magnet are forcefully pulling the metal objects towards it with electromagnetism.

Which piece of ice has the most themal energy
A. 10,000 g ice sculpture at -1c
B. 10 g ice cube at -1c

Answers

it's B

Explanation:

just because 1111111111111111111

What percent of the universe's age is the first 400,000 years?

Answers

Answer:

the globuler cluster

Explanation:

hope this helps maybe next time show anwsers

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:

A

Explanation:

An atom that is a different isotope of a given element would contain 6 protons, 7 neutrons, and 6 electrons. Therefore, option (A) is correct.

What is an isotope?

Isotopes are atoms of an element that contain the same atomic number as the original element but a different atomic mass. Isotopes of an element possess the same number of electrons and the number of protons but different numbers of neutrons in their respective nucleus.

For example, the isotopes of carbon are carbon-14, carbon-13, and carbon-12. Carbon-14 has a total of 8 neutrons, carbon-13 have a total of 7 neutrons, and carbon-12 has a total of 6 neutrons. So all the isotopes of carbon have different numbers of neutrons.

Given element has 6 protons, 6 neutrons, and 6 electrons. So the isotope of this element will have  6 protons, and 6 electrons but not 6 neutrons. Therefore, the element with 6 protons, 7 neutrons, and 6 electrons is the isotope of the given element.

Learn more about isotopes, here:

brainly.com/question/11680817

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what are the stages of breast cancer and what happens in each stage?


actually anatomy & physiology
own words pls i need it now

Answers

Answer:

There are 5 stages of breast cancer: stage 0 (zero), which is non-invasive ductal carcinoma in situ (DCIS), and stages I through IV (1 through 4), which are used for invasive breast cancer. The stage provides a common way of describing the cancer, so doctors can work together to plan the best treatments.

Explanation:

What are 2 mixtures and explain your answer

Air
Orange juice
Silver
Sodium chloride
Water ​

Answers

Water and orange juice
Or orange juice and sodium chloride

what method of cleaning tools and equipment do you follow or apply?​

Answers

I clean with a rag wdym

The thick soil accumulation of fine-grained particles is called: O Sediment Loess O Gravel O Silt​

Answers

The thick soil accumulation of fine-grained particles is called as silt

what role do particles play in exterting pressure?

Answers

Answer:

Pressure is an important physical quantity—it plays an essential role in topics ranging from thermodynamics to solid and fluid mechanics. As a scalar physical quantity (having magnitude but no direction), pressure is defined as the force per unit area applied perpendicular to the surface to which it is applied. Pressure can be expressed in a number of units depending on the context of use.

Explanation:

Probably not the best answer but hope this helps somewhat. :)

when a sample of CO2(s) becomes CO2(g), there is a change is

Answers

Explanation:

hope it helps you please make me brainlest (it's a photo)

what is generally true about the compressibility of solids?​

Answers

Answer:

That it is hard to compress

Explanation:

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