.Element Z is a neutral element and has 39 protons. What element is it and how many electrons does it have? (Use the periodic table)

Platinum – 78

Yttrium – 39

Argon – 18

There is not enough information given to determine.

Answer:

to interpret laws

Explanation:

Answer:

To Interpet Laws

Explanation:

Answer:

Explanation:

The molarity of the solution can be found by using the formula:

c is the concentration in M , mol/dm³ or mol/L

v is the volume in L or dm³

m is the mass in grams

M is the molar mass in g/mol

From the question;

mass = 5 g

Molar mass (M) of KCl = 39 + 36.5 = 75.5 g/mol

Since the volume is in mL it has to be converted to litres.

v = 0.1 L

We have the final answer as;

0.67 M

compounds are composed of elements

elements are composed of sub atomic particles such as electrons and proton

A compound is made of of 2 or more elements. Elements are made up of atoms. So compounds are also made up of atoms because they are made up of elements.

Please comment!

The answer is:

Sublimation

The explanation:

The most state has the high volume is the gas state.

So here the answer is between vaporization and sublimation???

and when the sublimation is: the change of the material from the solid state to the gas state directly without pass to liquid state from the solid first then to the gas

and the vaporization is : The change of the material from the liquid state to the gas state by heating Ex: water vaporize at 100°

here, the answer is sublimation because the difference of volume which resulted from this process is more than the volume resulted from vaporization.

Answer: The correct answer is Option 4.

Explanation:

All these processes are the physical processes which occurs between the phases of matter.

Solid state is the phase where particles are closely arranged and the volume of this state is less.

Liquid state is the phase where particles are not closely arranged and the volume of this state is more than solid but less than gaseous state.

Gaseous state is the phase where particles are loosely arranged and this state has the largest volume.

• Deposition is the physical process in which gaseous state is converted to solid state. The volume of the substance decreases.

• Melting is the the physical process in which solid state is converted to liquid state. The volume of the substance increases.

• Vaporization is the physical process in which liquid state is converted to gaseous state. The volume of the substance increases.

• Sublimation is a physical process in which solid states is converted to gaseous state. The volume of the substance increases and in this case, the increment in volume is the maximum.

Hence, the correct answer is Option 4.

Average kinetic energy is given by the formula:

KE(average) = 3/2*k*T

where k = Boltzmann constant = 1.38*10⁻²³ J/K

T = temperature in Kelvin (K)

Thus, the average KE is dependent only on temperature and independent of mass.

Since the temp in Cup A and B remains the same, the average KE will also be the same.

Ans C)

The reaction: Mg(s) + 2 AgNO3(aq) → Mg(NO3)2(aq) + 2 Ag(s) is represents - single replacement reaction.

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution. Magnesium can easily lose electrons as compared to silver and result in the formation of magnesium nitrate and silver.

• A double displacement reaction is a chemical reaction in which ion exchange takes place.
• A synthesis reaction is a chemical reaction in which two reactants combine to give a single product.
• Decomposition is a chemical reaction in which one substance decomposes to give two or more than two products.

Thus, the reaction represents - single replacement reaction.

Learn more about double displacement reaction:

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