How are bird bones adapted for flight?
1. They are thin.
2. They are hollow.
3. They are strong.
4. Birds do not have many bones.

Answer:

True

Explanation:

Answer:

Explanation:

Remark

It's true.

That's how the  periodic table is designed. Hydrogen is #1 and #116 is the latest entry. It is known as  flerovium and livermorium. I'm not sure if that and shouldn't be an or, but that is your answer.

Answer:

23,31 atm

Explanation:

p1v1 = p2v2

2.3 * 300  = p2 *29.6

p2=23.31 atm

In the balanced chemical equation 2 Al(s) + 3 Br2(l) → Al2Br6(s), the stoichiometric ratio between Al and Br2 is 2:3. This means that for every 2 moles of Al consumed, 3 moles of Br2 will be consumed. Since we are given the number of molecules of Br2, we need to convert it to moles using Avogadro's number.

6.02 x 10^23 molecules of Br2 is equal to 6.02 x 10^23 / 6.022 x 10^23 = 0.999 moles of Br2.

According to the stoichiometric ratio, for every 3 moles of Br2 consumed, 2 moles of Al will be consumed. Therefore, the number of moles of Al consumed will be (2/3) * 0.999 = 0.666 moles.

Finally, we can convert the moles of Al to atoms using Avogadro's number. One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.).

So, the number of atoms of Al consumed will be 0.666 * 6.022 x 10^23 = 4.01 x 10^23 atoms of Al.

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Answer:

A weak acid is an acid which dissociates partially to release few hydrogen protons or ions

Explanation:

\(.\)

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

I don't get what you want me to do cause n Explano questions showing ation:

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

"Mayans cooking method includes digging a shallow pit, lining it with stones or clay balls.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya, with different types of fruit. Corn was made into a kind of porridge, called atole in Mesoamerica and capita in Inca territory.

Avocados and tomatoes were mainly eaten by the Aztecs and Maya.

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The standard potential of a galvanic cell where x is the anode and y is the cathode can be determined using the equation E°cell = E°cathode - E°anode, where E°cell is the standard cell potential, E°cathode is the standard reduction potential of the cathode, and E°anode is the standard oxidation potential of the anode.

The standard potential is a measure of the tendency of the cell to produce a flow of electrons. A positive standard cell potential indicates that the cell will produce a flow of electrons from the anode to the cathode. The magnitude of the potential is dependent on the specific electrode materials and conditions of the cell.
The standard potential of a galvanic (voltaic) cell is determined by the difference in standard reduction potentials between the anode (X) and the cathode (Y). In this cell, X undergoes oxidation, losing electrons, while Y undergoes reduction, gaining electrons. The standard cell potential (E°cell) can be calculated using the formula:
E°cell = E°cathode - E°anode
Here, E°cathode is the standard reduction potential of Y and E°anode is the standard reduction potential of X. To find the values for X and Y, refer to the standard reduction potential table. A positive E°cell indicates a spontaneous reaction, while a negative value implies non-spontaneity.

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After considering the given the data we conclude that the  ionization energy generally increases from left to right across a period. Therefore, the element with the highest ionization energy in period 3 would be located on the right side of the periodic table.

We can also see from the search results that helium has the highest ionization energy of all the elements, while sodium has the lowest ionization energy in period 3. Therefore, we can conclude that the element with the highest ionization energy in period 3 is located to the right of sodium.
Based on the periodic table, we can see that the elements in period 3 are:
Sodium (Na)
Magnesium (Mg)
Aluminum (Al)
Silicon (Si)
Phosphorus (P)
Sulfur (S)
Chlorine (Cl)
Argon (Ar)
Therefore, the element with the highest ionization energy in period 3 is most likely Argon (Ar), which is located on the far right side of the period.
In summary, the element with the highest ionization energy in period 3 is most likely Argon (Ar).
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The moles of carbon dioxide produced by the reaction acetylene of 0.055mol of oxygen is  0.044 mole.

Acetylene is a chemical compound with the formula C₂H₂ and structure H−C≡C−H. it is a hydrocarbon and the best alkyne. This colorless fuel is widely used as a gas and a chemical constructing block. it is unstable in its pure form and consequently is usually handled as a solution.

The balanced chemical reaction is,

2C₂H₂ (g) + 5O₂ (g)   ===>   4CO₂ (g) + 2H₂O (g)

2 C2H2 (g)  + 5 O2 (g)   -------->  4 CO2 (g)  + 2 H2O (g)

2 mol acetylene  -------->  4 mol CO2

  ?? C2H2    ------------> 0.055 mol Co2

moles of acetylene = 0.055 x 2 / 4

                           = 0.0275 mol

moles of acetylene = 0.028 mol

5 mole of oxygen produced = 4 mole of CO₂

0.055mol of oxygen = 4/5 ×  0.055

                                   = 0.044 mole

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In the design of a new baby diaper, the manufacturer uses two polymers. The polymer that is best suited to the outside of the diaper is polymer I and to the inside is polymer II

Polymers are large molecules made by bonding (chemically linking) a series of building blocks or smaller units called monomers. The word polymer comes from the Greek words for “many parts.”

Polymers don’t have a definite length. They usually don’t form crystals, either. Finally, they usually don’t have a definite melting point

Monomers used to create polymer I is a dicarboxylic acid and for polymer II is an alkene.

They undergo addition polymerization.

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Answer: The percentage of the (R)-limonene in the sample is 67.24%.

The percentage of the (R)-limonene in a sample of limonene with a specific rotation of -38 can be calculated using the following equation:

Percentage (R)-limonene = (Specific rotation of sample - Specific rotation of (S)-limonene) ÷ (Specific rotation of (S)-limonene) x 100%

In this case, the equation is:

Percentage (R)-limonene = (-38 - (-116)) ÷ (-116) x 100% = 67.24%

Therefore, the percentage of the (R)-limonene in the sample is 67.24%.

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Answer:

Mass = 32 grams

Explanation:

Given:

Mole = 1 mol

Molar Mass = 32 g

Required:

Mass in grams = ?

Solution:

Mass in grams = Moles × Molar mar

Mass = 1 × 32

Mass = 32 grams

Answer: Force of attraction called bond

click no answer provided

Explanation:

Answer:

B

Explanation:

yes, truly it is force of attraction but from the question,it said attraction created by opposite charge of protons and electrons (positively charged and negatively charged respectively)

Answer:  True. Only primary alcohols can be oxidized to carboxylic acids using an oxidizing agent such as potassium permanganate (KMnO4) or chromium trioxide (CrO3) in an acidic solution. Secondary alcohols can be oxidized to ketones, but not to carboxylic acids, while tertiary alcohols cannot be oxidized at all using these reagents.

Explanation:

The portion of energy from the Sun that reaches the Earth​ is known as

electromagnetic spectrum.

Energy transfer from objects in space such as the Sun usually reach the

earth through the process known as radiation. The energy is referred to as

electromagnetic energy.

Components of the electromagnetic spectrum are:

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The volume of CO2 at STP =124.298 L

Given

Reaction

4 KMnO4, +4 C3H5(OH)5, -7K2CO3, + 7 Mn2O3, +5 CO2, + 16 H2O

701,52 g of KMnO4

Required

volume of CO2 at STP

Solution

mol KMnO4 (MW=158,034 g/mol) :

mol = mass : MW

mol = 701.52 : 158.034

mol = 4.439

mol CO2 from equation : 5/4 x mol KMnO4 = 5/4 x 4.439 = 5.549

At STP 1 mol = 22.4 L, so for 5.549 moles :

=5.549 x 22.4

=124.298 L

At 40°C 12.25 g potassium sulfate would be precipitated

Saturated solutions are those in which the maximum amount of solute has been dissolved. The solute precipitates out of the solution as more solute is added.

Solubility of potassium sulfate is shown as:

Solubility of potassium sulfate at 40 °C will be 15 g/100 g

It can be understand that at 40 °C 15 g of potassium sulfate would get completely dissolved in 100 of water.

46.0 g of potassium sulfate to 225 g water

Amount of potassium sulfate will get dissolve in 225 g of water at 40 °C will be:

15 g/100g ×225 g = 33.75 g

Amount of potassium sulfate precipitated by the solution can be determined by as follow:

= 39.0 g-33.75 g = 5.25 g

At 40 °C 5.25 g of potassium sulfate will get precipitate out from the solution which means that solution is saturated.

It is given that, the amount of potassium sulfate which is added :
46 g - 33.75 g = 12.25 g.

Therefore, at 40°C 12.25 g potassium sulfate would be precipitated.

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Answer; a) Covalent compound are formed when atoms of different molecules share electrons in order to be stable either by losing or gaining electrons

eg.. HCL hydrogen chloride , a chlorine atom has 7 electrons on its outer shell and hydrogen has 1 so when this two pair they become covalently bonded. chlorine shares one electron with the hydrogen atom ,thus to say both now have a stable arrangement of electron in their outer shell.

methane CH4 the carbon atom has 4 electrons and hydrogen has 1 so carbon would need 4 more and hydrogen would need 1 more so carbon pairs with 4 hydrogen atoms making it 8 and hydrogen 2 so they now have a stable arrangement ,thus the carbon atom shares with 4 hydrogen atoms.

b) some physical properties are

i)they have low melting and boiling points

ii)their insolubility in water

iii) they are non conductors of electricity

c) an experiment using their melting and boiling point

EXPERIMENT; lets use the covalent molecule carbon monoxide CO

when you apply heat and it tend to melt at a -199 degree celsius then it is a covalent molecule

and when it starts to boil at -191 degree celsuis then its sure a carbon monoxide covalent molecule

explanation; the reason for its low melting point and boiling point is because the attraction between the molecule is very low so it doesn't need much energy to break up the lattice between them.

HOPE THIS HELP if you need more explanation feel free to comment in the comment section

Considering the definiton of atomic number and atomic mass, the number of neutrons of the potassium is 21.

All atoms are composed of a central nucleus in which there are particles with a positive electric charge, the protons, and a neutral charge, the neutrons, around which other particles with a negative electric charge, which are electrons, move.

Atoms of different elements have different amounts of protons. The atomic number (which is identified by the letter Z) indicates the amount of protons that is present in the nucleus of an atom. This number is then responsible for defining the electronic configuration of the atom and the chemical properties of the element.

On the other side, the atomic mass (A) is defined as the sum of number of protons and number of neutrons:

Atomic mass = Number of protons  + Number of neutrons

In this case, the potassium (K) elements has atomic number 19. That means, the number of of protons is equal to 19. And the atomic mass is 40. So, the number of neutrons is calculated as:

40= 19  + Number of neutrons

Solving:

Number of neutrons= 40 - 19

Number of neutrons= 21

Hence, the number of neutrons of the potassium is 21.

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The given statement suggests that CaCl₂ is dissolved in water. We are required to identify which of the given steps is not involved in this solvation process.

The three steps involved in the solvation process are dissociation, ionization, and hydration. Out of these three steps, ionization is not involved in the solvation process of CaCl₂ in water.Ionization is the process of forming ions by losing or gaining electrons, whereas dissociation is the separation of a molecule into ions.

Hydration is the process in which ions of an ionic compound get surrounded by water molecules in solution. When CaCl₂ is dissolved in water, it dissociates into its respective ions, Ca²⁺ and 2Cl⁻. Hence, dissociation and hydration occur during the solvation process of CaCl₂ in water.

Therefore, the answer to this question is that ionization is not involved in the solvation process of CaCl₂ in water.In conclusion, CaCl₂ dissolves in water through dissociation and hydration processes.

Dissociation separates it into Ca²⁺ and 2Cl⁻ ions, whereas hydration involves the surrounding of these ions by water molecules. Ionization is not involved in the solvation process of CaCl₂ in water.

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1) Note that Water has a higher specific heat than sand.

Specific heat is the amount of heat required to raise the temperature of a substance by one degree Celsius.

Since water has a higher specific heat than sand, it takes more heat energy to raise the temperature of water by one degree Celsius than it does for sand.

This means that water can absorb more heat energy without a significant temperature change, making it useful for regulating temperature in various applications, such as in living organisms or in industrial processes.

From the graph, we can see this clearly indicated since over 14 minutes, the temperature of the water rose to only 25 degrees celsius while the temperature of the sand at the 14th minute was already at 30.25 degrees Celsius.

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