What group would this element be in?

Answer:

The interference is 8

Explanation:

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:

Answer:

it's A I think

Explanation:

hope u pass on this homework

Answer:the answer is c , location Y

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

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.

To know more about conservation of energy, visit the below link:

https://brainly.com/question/23590186

#SPJ2

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

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

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).

More about activation energy: brainly.com/question/5280701

#SPJ4

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

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

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.

Learn more about Polarity here:

https://brainly.com/question/26849258

#SPJ4

Answer:

here is my answerrrrrrr

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

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.

Learn more from

https://brainly.com/question/20424975

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

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.

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.

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.

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.

Learn more about superscripts on https://brainly.com/question/12727217

#SPJ6

Answer: 200000 J

Explanation:

Formula for kinetic energy: Ek=1/2 *mv^2

m=1000 kg. v=20.0m/s

Ek=1/2 *1000*20^2

Ek=500*400

Ek=200000 J

J=joules

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

To learn more about Speed from the given link:

https://brainly.com/question/13943409

#SPJ4

This article aims to find that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates its [tex]Ca^{2+}[/tex] as well as [tex]Na^{+}[/tex] currents, and [tex]Ca^{2+}[/tex] dissociation from this site is responsible for the inactivation of its [tex]Na^{+}[/tex] current.

The most extensively studied of the store-operated ion channels, which are widely expressed and crucial to many vital biological processes, is the [tex]Ca^{2+}[/tex]  release-activated [tex]Ca^{2+}[/tex] (CRAC) channel. But little is known about the CRAC channel's molecular makeup or how intracellular or extracellular messengers control it.

It becomes more permeable to monovalent cations with a higher current when extracellular divalent cations are absent, however this monovalent cation current quickly deactivates due to an unidentified mechanism.

Here, it was found that [tex]Ca^{2+}[/tex] occupancy of a site on the extracellular side of the CRAC channel ordinarily potentiates both its [tex]Ca^{2+}[/tex] and [tex]Na^{+}[/tex] currents. [tex]Ca^{2+}[/tex] dissociation from this site, however, results in the inactivation of the channel's [tex]Na^{+}[/tex] current. This [tex]Ca^{2+}[/tex]-dependent potentiation is required for the normal functioning of CRAC channels.

Learn more about [tex]Ca^{2+}[/tex] channels here:

https://brainly.com/question/14869301

#SPJ4

Answer:

+ 3

Explanation:

please mark me brainliest

Answer:

Orion Nebula

Explanation:

That is an enormous cloud of gas and dust

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.

Answer:

A-bone cell, bone cell C-bone tissue, bone cell bone tissue, femur, skeleton, dog B-dog.

Explanation:

It is ordered from the smallest unit (tissue microstructure) to a tissue or organ that are considered macrotisular structures.

Answer:

B.

Explanation:

Mass of CO₂ = 132 g

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]

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: