Did the addition of salt change a physical or chemical property of water?

Answer:Burning marshmellows over fire

Explanation:

Answer:

Fahrenheit, Cabrowskin, Dixionanon, and Ancomthere. Those are non examples.

Answer:

and the answers are

1 electron cloud

2 neutron

3 no charge

4 electron shell

5 proton

6 + charge

7 nucleus

8 neutron

9 - charge

Explanation:

PLEASE GIVE BRAINLIST

Answer:

D) They wanted to remain part of Britain

Explanation:

i took the test lol

Answer:

D

Explanation:

Answer:

C

Explanation:

A year is a complete revolution around the Earth

Answer: 2nd option

Explanation: took the quizz

Answer:   Scientists debated the theories with each other and compared the theories with scientific observations.

         c your welcome

Explanation:

The statement which best describes how scientists arrived at the current understanding of electromagnetic energy is (C)  Scientists debated the theories with each other and compared the theories with scientific observations. hence option (C) is correct.

Electromagnetic energy consists of waves of the electromagnetic field, propagating through space, carrying electromagnetic radiant energy.

It includes radio waves, microwaves, infrared, light, ultraviolet, X-rays, and gamma rays. All of these waves form part of the electromagnetic spectrum.

A unification criterion holds that a theory is empirically successful, and thus confirmed, to the ex- tent that it predicts or explains a large number of empirical results by ap- pealing to only a relatively small number of basic principles.

Theerfore, The statement which best describes how scientists arrived at the current understanding of electromagnetic energy is (C)  Scientists debated the theories with each other and compared the theories with scientific observations. hence option (C) is correct.

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Answer:

Both types of waves transfer energy

Explanation:

I think that's right

Electromagnetic waves and sound waves  both types of waves can transfer energy.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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Answer: is C&A

Explanation:the electric motor converts  electricity in to mechanical energy

the  electric generator converts mechanical energy to electricity so it could not be D.

and they don't use batteries as their main source of power so it could not be B.

hence forth it is C&A

HOPE THIS HELPS!!!!!!1

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The volume of H₂ evolved at NTP=0.336 L

Reaction

Decomposition of NH₃

2NH₃ ⇒ N₂ + 3H₂

conservation mass : mass reactants=mass product

0.28 NH₃= 0.25 N₂ + 0.03 H₂

2 g H₂ = 22.4 L

so for 0.03 g :

[tex]\tt \dfrac{0.03}{2}\times 22.4=0.336[/tex]

Answer:

Explanation:  15

Answer:

Earths rotation

Explanation:

Answer:

because if there was not four diferent season we would not have a day or a night because we would not be moving

Explanation:

The final temperature : 313.06 °C

Gay Lussac's Law  

When the volume is not changed, the gas pressure is proportional to its absolute temperature  

[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]

P1=0.3 atm

T1=25 + 273=298 K

P2=0.59 atm

[tex]\tt \dfrac{0.3}{298}=\dfrac{0.59}{T_2}\\\\T_2=586.06=313.06~^oC[/tex]

Answer:

Awnser: D,Newtons second law of motion

The average atomic mass of a sample closer to the mass of Li-6

Isotopes are atoms whose no-atom has the same number of protons while still having a different number of neutrons.  

So Isotopes are elements that have the same Atomic Number (Proton)  

Atomic mass is the average atomic mass of all its isotopes  

In determining the mass of an atom, as a standard is the mass of 1 carbon-12 atom whose mass is 12 amu  

Mass atom X = mass isotope 1 . % + mass isotope 2.%  

three Li-6, mass number = 6

two Li-7, mass number = 7

total abundance = 5

abundance for Li-6 =

[tex]\tt \dfrac{3}{5}\times 100\5=60\%[/tex]

abundance for Li-7 =

[tex]\tt \dfrac{2}{5}\times 100\5=40\%[/tex]

Average atomic mass :

[tex]\tt (0.6\times 6)+(0.4\times 7)=6.4[/tex]

Answer:

entropy

Explanation:

Answer:

D. All of the above

Explanation:

Molecules, ions, and pure elements might be included in a chemical reaction. Therefore, option (d) is correct.

A chemical reaction can be described as a reaction that brings the chemical conversion of one chemical substance to another chemical substance. The reactions cause chemical changes that include the rearrangement of electrons in order to create and break bonds between atoms.

The compound or molecules which are primarily utilized in a reaction are called reactants. Chemical reactions give products, which possess characteristics different from the reactants of the reaction.

Chemical reactions take place at a definite rate of reaction at a given concentration, temperature, and pressure. The rate of reaction increases with the rising temperature of the reaction as more activation energy is available for reactant molcules collisions.

Therefore, in a chemical reaction reactants and products can be present as Molecules, ions, and pure elements.

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Answer:

The nucleus of the atom contains two subatomic particles, the protons which are positively (+) charged and the neutrons which are neutral (no charge).

Explanation:

Answer:

The atomic mass is 101.

Explanation:

Protons and neutrons are the only particles that contribute to mass. Electrons do have a mass, but it's so miniscule and insignificant that it doesn't contribute to the mass of an atom. In every instance of calculating atomic mass, add the number of protons to the number of neutrons.

Therefore,

44 + 57 = 101

number of protons + number of neutrons = atomic mass

Also, there can never be a negative amount of protons or neutrons, so if you get a negative number, there's something wrong.

Bonus Information:

Don't confuse mass with charge! As it says in its name, neutrons are neutral or have no charge. Protons (+) and electrons (-) are the only particles that have a charge, so calculating that would be different.

If you were calculating the atomic charge with the same numbers, your answer would be:

44 - 42 = 2

Charge = +2

What To Remember:

M = p + n

C = p - e

C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons

I hope this helps!

Answer:

yes the cell membranes are semi permeable

Answer:

2 meters equal 200 centimeters

Explanation:

1 meter is equal to 100 centimeters.

Hope this helped, have a good day!

For a fence is 2 meters feet tall, the fence is 183.92 centimeters tall.

There are 0.3048 meters in 1 foot. So, a 2 meters fence is equal to 2 x 0.3048 = 0.6096 feet tall.

To convert feet to centimeters, multiply the number of feet by 30.48. So, a 0.6096 feet fence is equal to 0.6096 x 30.48 = 183.92 centimeters tall.

Therefore, the fence is 183.92 centimeters tall.

Feet to centimeters:

1 feet = 30.48 centimeters

0.6096 feet × 30.48 centimeters/feet

= 183.92 centimeters

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Answer: Comparing rock layers in distant places can be a challenge for geologists since these layers may have different environmental factors that caused different transformations in them.

Therefore, when it is necessary to establish a comparison between layers of rocks in different ligands, geologists must establish steps to make an efficient comparison and have results consistent with reality. To do this, they must first compare a layer in one location with layers in other locations, assign relative age to a layer in one location, and identify index fossils in one or more layers in one location.

Answer:

C

Explanation:

Answer:

N, P, As, Sb

Explanation:

Elements present in the same group having same number of valence electrons. The first option is correct from given options because nitrogen, phosphorus, arsenic and antimony are present in same group thus having same number of electrons in outer most  energy level.

Electronic configuration of N:

N₇: [He] 2s² 2p³

Electronic configuration of P:

P₁₅: [Ne] 3s² 3p³

Electronic configuration As:

As₃₃: [Ar] 3d¹⁰ 4s² 4p³

Electronic configuration Sb:

Sb₅₁: [Kr] 4d¹⁰ 5s² 5p³

Here it is clear from electronic configuration all these elements have five number of valence electrons.

Explanation:

Load=500N

Effort=100N

Now,

We have,

Mechanical advantage= Load / effort

= 500/100

=5

Therefore, mechanical advantage is 5.

The polyatomic ions are those ions which has more than two atoms involved such as the other options than OH^-1 in the question. The OH^-1 ion is the diatomic ion because it has only 2 atoms