which two letters has the most kinetic energy?
W
X
Y
Z​

Answer:

1. Alchemy

2.Alloy

3.Atom

4.Compound

5. Element

6. Metal

7. Non metal

Explanation:

1. An ancient study or art which attempted to combine science and philosophy to solve worldly problems is alchemy

2. A homogeneous mixture of elements with metals to form metallic solids is an alloy

3. The simplest unit of an element that still retains the properties of that element compound is an atom.

4. Two or more elements joined together such that the elements have lost their individual identity element is called a compound

5. A primary substance that cannot be divided into separate substance is an element

6. The group of elements that are good conductors of electricity and heat is called a metal

7. The group of elements that are poor conductors of electricity and heat are called non metals.

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Answer:

Rem is used to measure biological risk, and rad is used to measure absorbed radiation.

Explanation:

Here is an image to prove that this is correct. Did on Edge

Answer:

oTNT

Explanation:

Another name for the explosive dynamite is TNT, Trinitrotoluene.

Dynamite is an explosive that finds a wide range of application in many mining processes.

Answer:

i think it would be B.

Explanation:

Answer:

well I dont know much about it but....

I think the soul if nature is kind if like a goddess which provides us the reason to live and the reason to die.

I guess thats it :/

Answer:

The human soul is naturally and essentially immortal; it is uncreated and eternal. The soul passes from one body to another through a series of many incarnations. After paying off its sin (karmic debt), the soul is liberated from somatic existence and lives in a totally blissful state.

Explanation:

hope it helps you

Answer:

A. It is the work done when a force of 1 newton is applied to an object for a distance of 1 meter

Explanation:

The work done when a force of 1 newton is applied to an object for a distance of 1 meter is called as joule. Therefore, option A is correct.

The term work done is defined as whenever work is done, energy is transferred.

To move an object, it must be converted into energy. The method of force can be used to transfer energy. Work done is the amount of energy transferred by a force to move an object.

Work can be calculated using the formula: Work = Force Distance. The joule (J) or Newton meter (N m) is the SI unit for work. One joule is the amount of work done when one Newton of force moves an object one meter.

Thus, The work done when a force of 1 newton is applied to an object for a distance of 1 meter is called as joule, option A is correct.

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Answer:

8 atoms of oxygen.

Explanation:

Given parameter:

Mass of magnesium phosphate  = 15g

Unknown:

Number of oxygen atoms  = ?

Solution:

The formula of the compound is;

        Mg₃(PO₄)₂;

 Number of atoms oxygen  = 2(4) = 8 atoms of oxygen.

Answer:

This question is incomplete, the options are:

(A) color of the liquid

(B) mass of the liquid

(C) the volume of the liquid

(D) the boiling point of the liquid

The answer is D

Explanation:

Substances at different states usually possess certain properties that distinguishes them. For example, in this case involving a student who was given a sample of an unknown liquid to test in the laboratory, he thinks that the unknown liquid is water. Specific properties of the unknown liquid can be used to identify whether it is water or not.

One property that can be used to ascertain whether or not it is water is the boiling point of the liquid. This is because specific liquids have specific boiling point. So if the unknown liquid has a boiling point of 100°C, then it can be ascertained to be water.

Answer: B

Explanation:

The observations about the fizzing mixture provide evidence of a chemical reaction is A substance escaped from the beaker in the form of a gas. The correct option is B.

A chemical reaction is a process of forming a compound from two substances. The substance that reacts to create a compound is called a reactant, and the compound that is formed after the reaction is called a product.

In a beaker, a chemist mixed hydrochloric acid with a sample of baking soda. The two chemicals together instantly started to bubble and fizz. Fizz is the bubbles that are made in the reaction, they are realized in the environment. Thus, they have escaped from the beaker.

Thus, the correct option is B. A substance escaped from the beaker in the form of a gas.

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Answer:

The most correct option is A

Explanation:

The correct option is A because all objects emit thermal radiation when there temperature is higher than absolute zero - this is based on the Stefan-Boltzmann law. Hence, when the rods in an oven heat up above absolute zero, they begin to start emitting radiation. It should noted at this point that objects do not "emit" conduction and thus all options that involved "emitting conduction" are subsequently wrong.

Answer:

1. Mg²⁺   2. Cl⁻    3. PO₄³⁻

Explanation:

Answer:

1. Mg²⁺

2. Cl⁻

3. PO₄³⁻

Explanation:

Feel free to give brainliest.

Have a great day!

Answer:

9.03 x 10²³atoms

Explanation:

Given parameters:

Number of moles of CO₂  = 1.5mol

Unknown:

Number of atoms  = ?

Solution:

In a mole of a substance, we have the Avogadro's number of particles which is 6.02 x 10²³atoms.

  Using this number, we can determine the amount of atoms in any substance.

If;

       1 mole of CO₂ contains 6.02 x 10²³ atoms;

     1.5mole of CO₂ will contain 1.5 x 6.02 x 10²³ atoms

                                                = 9.03 x 10²³atoms

Answer:

diselenium heptachloride

Explanation:

Se2Cl7

Se = selenium

Cl = chlorine

Don't forget the "-ide"

Diselenium heptachloride

Answer:

protons, neutrons and electrons

Explanation: Can you pls give be branily thanks*

Answer:

smaller particles?

Answer:

d = 3 g/cm³

Explanation:

Given data:

Mass of stone = 27 g

Volume of water = 10 cm³

Volume of water+ stone = 19 cm³

Volume of stone = ?

Density of stone = ?

Solution:

Volume of stone = total volume - volume of water

Volume of stone = 19 cm³ -  10 cm³

Volume of stone = 9 cm³

Density of stone:

d = m/v

d = 27 g/ 9 cm³

d = 3 g/cm³

Answer:

I think the answer is A. I am only 50% sure I am correct, but hope it helps!

Explanation:

Along the coast, its always colder near water

Answer:

Explanation: i think it is C if i'am wrong i'am sorry

Answer:

4.08

Explanation:

Answer:

A

Explanation:

Answer:

126.86

Explanation:

Given parameters:

1x - percent abundance = 80%(0.8), mass = 127

2x - percent abundance = 17%(0.17), mass = 126

3x - percent abundance = 3%(0.03) , mass = 128

Unknown:

Average atomic mass = ?

Solution:

The average atomic mass is the average of all isotopes of element. It can be calculated using the expression below;

RAM  = (mass x abundance of 1x) + (mass x abundance of 2x) + (mass x abundance of 3x)

Now insert the parameters and solve;

RAM = (127 x 0.8) + (126 x 0.17) + (128 x 0.03)  = 126.86

it provides carbon dioxide and rhen it goes through the car and gives the gas oxygen

Answer:

Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.

Explanation:

Answer:

5.5Hz

Explanation:

Given parameters:

Wavelength of green light  = 5.5 x 10⁷m

Unknown:

Frequency of the wave = ?

Solution;

Green light is a part of the electromagnetic spectrum. The speed of all these rays in free space is 3 x 10⁸m/s

So;

     V  = fλ

V is the speed

f is the frequency

λ is the wavelength;

 So;

         F = [tex]\frac{V}{wavelength}[/tex]  

  Insert the parameters and solve;

       F = [tex]\frac{3 x 10^{8} }{5.5 x 10^{7} }[/tex]   = 5.5Hz

Answer:

B

Graph 1 is An endothermic reaction and graph 2 is an exothermic reaction

Answer:

sodium is a member of the alkali metal family

Explanation:

Table salt (NaCl) is a compound. Every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as fixed composition.

Hope this helps! Please correct me if I'm wrong :)

Every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as " fixed composition".

A chemical compound has a predictable makeup. Every sample of a compound has almost the same composition, or even the identical proportion, by mass, of the components contained in the compound, as per Proust's reasoning.

Atomic building blocks make up molecules.

Therefore, every molecule of table salt has the same properties as every other molecule of table salt because they all have one sodium (Na) atom and one chlorine (Cl) atom. This is referred to as " fixed composition".

Hence, the correct answer will be option (B)

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