Magnesium has three isotopes: Magnesium-24 with a mass of 23.98504 amu and an abundance of 78.70%, magnesium-25 with a mass of 24.98584 amu and an abundance of 10.13%, and magnesium-26 with a mass of 25.98259 amu and an abundance of 11.17%.
Without doing the calculations, should the atomic mass of magnesium be closer to 25, 26, or 27 amu? Explain how you know.

Answer:

u can search it

Explanation:

please mark me as a brainlist

Answer:

3 m/s

Explanation:

24 m/s over 8 seconds would be 24/8 making it be 3 m/s avg

Answer:

The outer shells of non metal atoms gain electrons when they form ions this result in the formation of negative ions

ozone gas found in the stratosphere protects Earth from high energy ultraviolet radiation.

Answer:

Colligative properties are physical properties of solutions, like boiling point elevation and freezing point depression. In these calculations, the temperature of the solution is changing as we add more solute to the solvent, so this means that the volume of the solution is changing. Since molarity is moles solute per liter of solution, we cannot use molarity as our concentration unit. This is why we use molality (moles solute per kg of solvent) since the kg of solvent doesn't change with temperature.

Explanation:

First in boiling point elevation and freezing point depression, we deal with the system whose temperature is not constant.   Second we cannot express the concentration of the solution in mortality because it changes with temperature whereas mortality is temperature independent.  Therefore, while considering boiling point elevation and freezing point depression a solution concentration is expressed in mortality and not in mortality.

Answer  the ratio of Be to At is 1:2 in the compound

Explanation:

Be in Periodic Table 2A has 2 valence electrons in its outer orbital and needs to give them away.  When it gets rid of 2 negatives, its charge is +2.

At in Periodic Table 7A has 7 valence electrons in it outer orbitals and needs one more electron.  2 AT atoms each accept one electron from Be and each has a charge of -1.  The Be ion of +2 charge is balanced by the two At ions of -1 charge, so the ratio of Be to At is 1:2

Answer:

styrofoam would be 14°

metal would be 55°

paper would be 25°

plastic would be 28°

Explanation:

im pretty sure you just take the biggest number and subtract the smallest number. to get how much it has changed.

Taking into account the definition of reactivity, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.

Reactivity is a measure of the probability that a chemical species will participate in a chemical reaction to form chemical bonds.

In other words, the reactivity of a chemical element is the tendency that this element has to combine with others.

For elements that behave like metals, this trend is directly related to the ease with which they lose their valence electrons.

Valence electrons are those electrons farthest from the nucleus of the atom. These electrons are easier to remove because they are the least attracted to the nucleus. Thus, less and less energy is needed to start these valence electrons, so they can commonly participate in the formation of chemical bonds.

In other words, as the size of the metal atoms in a group increases, so does their reactivity.

Then, the correct option is the first option: Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.

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Answer:

Wdym?? there is no other hypotheses stated

Answer:

Let me know what you think about these answers.

Answer:

Orbital designation

for Principle Quantum number n=4, this is the shell number & corresponds to N shell, (shells are designated K,L,M,N)

for Angular Momentum number l=2, this is the orbital level corresponding to d, given that l can be any integer 0-(n-1), for( 0,1,2,3 )corresponds to (s, p, d, f)

The orbital designation is 4d

for Magnetic Quantum number ml, the suborbitals correspond to -l through l, (-2,-1,0, 1,2)

for ml=-1 the suborbital -1 in the 4d sub shell with electron spin state ms=-1/2

Answer:

La materia está constituida por átomos, que a su vez forman moléculas. Las moléculas constituyen la mínima parte en la que se puede fragmentar una sustancia para que conserve sus propiedades. Todo lo anterior permite que la materia se pueda presentar en estado sólido, líquido y gaseoso.

Explanation:

Answer:

5.1316 x10^2

Explanation:

just simply move the decimal point to the first number, and then count how many numbers are after the decimal point

Answer:

5.1316x10^2

Explanation:

move the decimal left until the number is 1-10(not including ten) and count how many places you moved for the exponent, in this case it’s 2

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question we have

[tex]volume = \frac{6.8}{2.702} \\ = 2.516654[/tex]

We have the final answer as

Hope this helps you

Answer:

plants

Explanation:

Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.

Hope this helps :)

Yes, there is a heap t storing seven distinct elements such that a preorder traversal of t yields the elements of t in sorted order. However, in inorder traversal and postorder traversal, there is no heap t storing seven distinct elements.

In a binary tree system, preorder traversal is used to make a duplicate of the tree. It is also utilized to obtain the prefix expression.

If there is a (min-heap) TT storing seven distinct elements such that a preorder traversal of TT yields the elements of TT in sorted order;

Then, the image attached below shows the description of the preorder traversal in sorted order.

In an inorder traversal, the parent is always listed after its left child. However, in a (min-heap), the parent is usually smaller than the left child. As such, the smaller parent is normally listed after its left child. Hence, inorder traversal of a (min-heap) is not usually sorted in order.

The same scenario for inorder traversal is true for postorder traversal, thus postorder traversal of a (min-heap) is not usually sorted in order.

Learn more about preorder traversal here:

https://brainly.com/question/14289989?referrer=searchResults

The coefficient indicates the number of molecules in what seems like a mathematical theorem or formula. A more comprehensive explanation follows.

Thus above response is right.

Learn more about chemical equations here:

https://brainly.com/question/12271256

Explanation:

In a normal heart, there is a balance between calcium and potassium ion levels in both the outer and inner walls of the heart. That balance keeps electrical energy flowing correctly through the heart, and allows the heart muscle to expand and contract as the heart beats.10-Nov-2005

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Answer:

could you explain the question further

Answer: 7.13 L

Explanation:

What is the volume of 1.0 mole of gas at a pressure of 3.12 ATM and a temperature of 270K

AT STP OF 1 ATM OF PRESSURE AND 273K ONE MOLE OF GAS OCCUPIES 22.4 L

WE HAVE MORE THAN TRIPPLED THE PRESSURE AND SLIGHTLY LOWERED THE TEMP

THE NEW VOLUME WILL BE 22.4 x (1/3.12) x 270/273 =7.13 L

The time taken for the radio signal to reach the earth is 9.1 x 10^3 seconds.

Let us recall that radio waves are part of the electromagnetic spectrum. This means that they travel with the speed of light.

The speed of the wave of obtained from the relation;

Speed = Distance/Time

Therefore;

Time = Distance/Speed

Distance = 2.72 x 10⁹ km or  2.72 x 10^12 m

Speed = 3 x 10^8 m/s

Time taken =  2.72 x 10^12 m/3 x 10^8 m/s

= 9.1 x 10^3 seconds.

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Answer:

Atom 1. The ratio of Atom 1 to the diagram one is 1/2. It is the most closely related. Feel free to mark brainliest!

Have a great day!

Answer:

11) True

12) True

13) False

14)False

15) True

Explanation:

Hope this helps!

Have a nice day! :D

Answer:

11 moles

Explanation:

From the coefficients of the equation, we know that for every 3 moles of CuO consumed, 1 mole of nitrogen is produced.

So, the answer is 32/3 = 11 moles to 2 sf.

I and II are the functional isomers of each other. Hence option A is correct.

Isomer is defined as when multiple compounds with the same chemical formula but different chemical structures exist. A prefix that denotes the number of carbons is followed by the suffix -ane, which designates that the molecule is an alkane. By counting the chiral centers in a chemical, one can determine how many optical isomers exist. The formula 2n1, where n is the number of chiral centers, indicates the greatest number of optical isomers.

They are functional isomers because alcohol CH3CH2CH2OH and ether CH3CH2OCH3 contain different functional groups. Functional isomerism, which refers to isomers that differ in the functional group present in the carbon chain, is exemplified by H3-CH2OH and CH3-O-CH3.

Thus, I and II are the functional isomers of each other. Hence option A is correct.

To learn more about isomers, refer to the link below:

https://brainly.com/question/13422357

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Answer:

Explanation:

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