How many moles of magnesium (Mg) are there in 96.3 g of Mg?

Statement that gives description as regards energy and bonding changes between atoms such as fluorine become a molecule of fluorine, bond Energy is released as a bond is formed. Thus option 4 is correct.

The Bond Energy otherwise called as bond enthalpy  is a quantity that offers insight into the strength of a chemical bond.

The  ‘bond energy’ can also be represented as “the average value obtained from the bond dissociation enthalpies of all the chemical bonds  in a given chemical compound.

The bond energy of a chemical bond is directly proportional to the stability of that bond which implies that the greater the bond energy o between two atoms, the greater the stability of that chemical bond.

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Your question was incomplete. The probable question.

Which statement describes the energy and bonding changes as two atoms of fluorine become a molecule of fluorine?

1.Energy is absorbed as a bond is broken.

2.Energy is absorbed as a bond is formed.

3.Energy is released as a bond is broken.

4.Energy is released as a bond is formed.

Answer:

Explanation:

The melting point of a substance is the temperature at which its melt. The state of a substance is dependent on it's melting temperature. Generally, melting point above 25 °C is a solid.

This means phenol is a solid

Duodecane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of 216 °C means it would require higher temperature to boil it. Since 25 °C is less than 216 °C it means that it would remain in the liquid state.

Methane has melting point below 25 °C hence it is either a liquid or gas. However its boiling point of -164 °C means it boils easily even at very low temperatures. Since 25 °C is greater than -164 °C it means that it would exist in the gaseous state

Answer:

AKWIJKNZQSOKQPALQALQPALALQLLKILILI

Answer:

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According to the concept of solubility and dissociation, aspirin at pH 8 and 10 undergoes dissociation to yield ions.

An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.

Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions are generated on dissociation.

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Answer:

https://quizizz.com/admin/quiz/5902a3fd8d05b2100088880a/cat-1-chemistry-review

Explanation:

Answer:

atomic? hope this helps!

Explanation:

Answer: 682 grams

Explanation:

The balanced chemical reaction is:

[tex]4Fe+3O_2\rightarrow 2Fe_2O_3[/tex]

[tex]O_2[/tex] is the limiting reagent as it limits the formation of product and [tex]Fe[/tex] is the excess reagent.

According to stoichiometry :

3 moles of [tex]O_2[/tex] produce = 2 moles of [tex]Fe_2O_3[/tex]

Thus 6.40 moles of [tex]O_2[/tex] will produce=[tex]\frac{2}{3}\times 6.40=4.27moles[/tex]  of [tex]Fe_2O_3[/tex]

Mass of [tex]Fe_2O_3=moles\times {\text {Molar mass}}=4.27moles\times 159.69g/mol=682g[/tex]

Thus 682 g of [tex]Fe_2O_3[/tex] will be produced from 6.40 moles of oxygen

Answer:

A) Ionic compounds containing variable metals should have Roman numerals

Explanation:

The correct option is;

A) Ionic compounds containing variable metals should have Roman numerals

This is because these variable metals have variable oxidation states and charges. Hence, to be able to distinguish between compounds containing the same  element but different charges, the roman numerals is used. For example;

FeCl₃ - Iron(III) Chloride

FeCl₂ -  Iron(II) Chloride

Answer:

Significant figures are a measure of precision.

Explanation:

The significant figures of a number are those that have a real meaning and, therefore, provide some information. Therefore, the set of digits that are known with certainty in a measure are called significant figures and are the digits of a number considered non-null.

Any experimental measurement is inaccurate and must be expressed with its significant figures.

In this way, significant figures express the precision of a measuring tool.

Answer:

To determine the correct subscripts in a chemical formula, you have to solve how many atoms you need to balance the charge.

For example if I had the compound Calcium Fluoride I would look at the periodic table and see that Calcium's ionic formula is

Ca2+

. How do I know this? Well all elements want to have 8 valance electrons so they can be stable(happy). Seeing that Calcium has 2 valance electrons it is going to give away 2 electrons because that is easier than gaining 6 to be happy. Since Calcium has given away 2 electrons it has two more protons than electrons. We know that Protons have a Positive charge, Electrons have Negative charge, and the number of electrons is equal to the atomic number of an element in its pure non-ionic state. (Meaning it doesn't have a positive or negative charge; it is balanced.)

So if calcium gave away two electrons, it will have two more protons than an electron giving it a (2+) charge. The same process can be applied to Fluoride. Since fluoride is one to the left of the noble gases(group 18 or 8A) on the periodic table we know that it has 7 valance electrons because it is in group 7A or 17.

Knowing that we have 7 electrons the fluoride atom will gain an extra electron. Since the fluoride atom gained an extra electron it will have one more negative charge than a positive making it a ^(−)ion.

So you know that Calcium has a 2+ charge and that fluoride has a 1- charge, you then need these ions to balance out. So you need two fluorine atoms with a 1- ions to balance out the 2+ ion of calcium. Your final answer would be

CaF2

because you need two fluorine atoms to balance out the 2+ charge of the calcium.

Final Tip: Determine the charges then inverse the charges, remove the positive and negative superscipts, and write the charge numbers as a sub script. Ie. Calcium Fluoride

Ca2+ and F−

inversing and removing the charge signs would give you

Answer: see below

Explanation: for 75 ml, take 45*75 mg of BSA and make up to 75 mL with distilled water.

Answer:

720

Explanation:

4 m/s

60 seconds

                            = 180 seconds

3 minutes

4 m/s

                             = 720 m/s

180 seconds

Answer:

B

Explanation:

just answered

An artificial reef is intended to affect the ocean ecosystem by providing shelter and habitat for marine organisms causing sediment to erode into deeper waters. Hence, option C is correct.

An artificial reef is a human-made underwater structure, typically constructed with the purpose of enhancing marine biodiversity, providing habitat for marine organisms, and promoting recreational activities like fishing, diving, and snorkeling.

Artificial reefs can be created from a variety of materials, such as concrete, metal, tires, and sunken ships. The reef structure can also increase the overall biodiversity of an area by creating a new habitat for species that may not have been present before.

Additionally, the presence of an artificial reef can help to reduce pressure on natural reefs by providing an alternative location for fishing and other activities. However, artificial reefs are not typically used as a means of removing pollution from the water or preventing erosion.

Therefore, option C is correct.

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Answer:

4

Explanation:

total electrons = 6

electronic configuration = 1s^2, 2s^2, 2p^6

so in s orbital there are 4 electrons.

Hope it helps you (｡◕‿◕｡)

Answer:

O During photosynthesis, plants take in carbon dioxide from the air.

Answer: The answer is: During photosynthesis, plants take in carbon dioxide from the air.

Explanation: I have my ways ;>

Answer:

A

Explanation:

In order for plants to entice pollinators, they must first offer their favorite foods: nectar and protein. Since most pollinators fly, the colors of a flower must attract them; therefore, the brighter the flower, the more likely it will be visited. ... For instance, bees are attracted to bright blue and violet colors.

hope this helps you out...

Answer:

[tex]n_{KClO_3}=0.0353molKClO_3[/tex]

Explanation:

Hello!

In this case, according to the experiment, we first realize that the pressure of oxygen is:

[tex]p_{O_2}=1.00atm-26.0/760 atm=0.966atm[/tex]

Next, we compute the moles based off the ideal gas law:

[tex]PV=nRT\\\\n=\frac{PV}{RT}=\frac{0.966atm*1.35L}{0.08206\frac{atm*L}{mol*K}*300K}=0.0530molO_2[/tex]

Thus, since there is 3:2 mole ratio between oxygen and potassium chlorate, we can compute the consumed moles of the latter as shown below:

[tex]n_{KClO_3}=0.0530molO_2*\frac{2molKClO_3}{3molO_2} \\\\n_{KClO_3}=0.0353molKClO_3[/tex]

Best regards!

Answer:

hydrogen

Explanation:

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Answer:

0.36 mol/L

Explanation:

The formula for molarity M=m/L

m stands for moles

L stands for liters

Plug it into the equation...

M=1.25 mol/3.5 L

M=0.35714285714

The question is incomplete, the complete question is;

A chemist prepares a solution of silver (I) perchlorate (AgCIO4) by measuring out 134.g of silver (I) perchlorate into a 50.ml volumetric flask and filling the flask to the mark with water. calculate the concentration in mol/L of the silver (I) perchlorate solution. Round your answer to 2 significant digits.

Answer:

13 mol/L

Explanation:

We must first obtain the number of moles of silver I perchlorate involved

Molar mass of silver I perchlorate = 207.32 g/mol

Number of moles of silver I perchlorate = 134g/207.32 g/mol = 0.646 moles

Recall that;

n =CV

C= concentration

V= volume

n = number of moles

C = n/V

C = 0.646 moles * 1000/50

C = 13 mol/L

Answer:

19 atoms

Explanation:

6 carbon, 12 hydrogen, one Nitrogen

Answer:

ikr

Explanation:

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Answer:

sometimes the female doesn't want to be hurt, or it could be from the last relationship she was in. maybe just maybe the female feels like you are using her for her body or just to use her. Sometimes females want to stop the heartache before it begins. Tbh we all have different reasons for it.

Explanation:

Answer:

1)To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.

2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.

3)Specify the Null Hypothesis.

Specify the Alternative Hypothesis.

Set the Significance Level.

Calculate the Test Statistic and Corresponding P-Value.

Drawing a Conclusion.

4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.

5)

Answer:

To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.

2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.

3)Specify the Null Hypothesis.

Specify the Alternative Hypothesis.

Set the Significance Level.

Calculate the Test Statistic and Corresponding P-Value.

Drawing a Conclusion.

4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.

Explanation:

To familiarize students with experimental apparatus, the scientific method, and methods of data analysis so that they will have some idea of the inductive process by which the ideas were originated. To teach how to make careful experimental observations and how to think about and draw conclusions from such data.

2)The hypothesis is an educated guess as to what will happen during your experiment. The hypothesis is often written using the words "IF" and "THEN." For example, "If I do not study, then I will fail the test." The "if' and "then" statements reflect your independent and dependent variables.

3)Specify the Null Hypothesis.

Specify the Alternative Hypothesis.

Set the Significance Level.

Calculate the Test Statistic and Corresponding P-Value.

Drawing a Conclusion.

4)Line charts, or line graphs, are powerful visual tools that illustrate trends in data over a period of time or a particular correlation. For example, one axis of the graph might represent a variable value, while the other axis often displays a timeline.

não se esqueça de mim não sei

3

2

1

4

6

5

not a 100% sure but i think this is it.

Answer: American red squirrel

Explanation:

The American red squirrel is the smallest squirrel. The color of the fur may vary from season to season. The color of the squirrel can also vary depending of the environment in which it lives. In summer the black stripe appears on the sides over the white fur. It has a backbone and like other mammals nurses the offsprings. It has a bushy tail. It is a native of North America. Red fur appear on the back and white on the belly. Strong claws, strong muscles, and compact body are other key features of the squirrel.

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