Answer:
Answer D. L
Explanation:
liter
.........
For a human zygote to develop into an embryo, it must undergo the
following process
O fertizlation
O meiosis
O mutations
O mitosis
Which bonds form in the reaction shown in the diagram? 2 2H, + 0 H-H O=0 H-H → 2H 0 H-0-H H-OH A. The bonds between the two hydrogen atoms and between the two oxygen atoms B. The bonds between the two hydrogen atoms C. The bonds between the oxygen and hydrogen atoms D. The bonds between the two oxygen atoms
The water molecule is formed by the covalent bonding between oxygen and hydrogen atoms. Therefore, option C is correct.
What is covalent bonding ?Covalent bonding is a type of chemical bonding that involves the sharing of electrons between two atoms. In covalent bonding, the two atoms share a pair of electrons to fill their outermost electron shell and form a stable molecule.
This type of bonding usually occurs between non-metal atoms, which have a high electronegativity and tend to attract electrons strongly. In a covalent bond, the shared electrons are attracted to the positively charged nuclei of both atoms, creating a strong bond.
The strength of the bond depends on the number of shared electrons and the distance between the nuclei. Covalent bonds can be either polar or nonpolar, depending on the electronegativity difference between the two atoms.
In water the bond is formed between oxygen atom and two hydrogen atoms. Hence, C is correct.
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Is hydrogen an intermolecular or intramolecular form of bonding. Explain your answer with molecular illustrations
Answer:
Hydrogen bonds can be intermolecular (occurring between separate molecules) or intramolecular (occurring among parts of the same molecule).
Explanation:
Hydrogen bonds can be intermolecular (occurring between separate molecules) or intramolecular (occurring among parts of the same molecule). Hope this helps.
what is the theory behind saturated solutions?
Answer: The term saturated solution is used in chemistry to define a solution in which no more solute can be dissolved in the solvent. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas. hope this helps. Can u give me brainliest
Explanation:
Answer:
I can't quite understand the question well but as for a saturated solution a saturated solution is a solution in which no more solute can be added like for example if you take 100 ml water and put a lot of solute in it like sugar then there will be a point at which no more sugar can be dissolved.at this point the solution is now termed as saturated solution
Which of the following shows the completed and balanced reaction for the replacement
reaction shown below?
Al + H2S04 ?
Answer:
D
Explanation:
For replacement reactions you have to combine A and C (which is Al and SO4)
Now we have
AlSO4
The problem is that the charges do not match
SO4 has a 2 charge and Al has a 3 charge
Crossing the charges will get us..
Al2(SO4)3 which leaves D
An aluminum can (Al) has a mass of 15.8 grams. How many atoms of aluminum are in the can?
Answer:
i think this is the answer you can try it tho...
Explanation:
Notice that the value 12.01 grams of natural carbon is the same as the atomic mass value (12.01 amu). It also tells us that 26.98 grams of aluminum contains exactly 6.022 x 1023 atoms of aluminum.
There are 3.524X 10 ^23 atoms of Aluminium in the can
Relationship between atoms and Avogadro Number
An atom is the smallest indivisible unit of matter which forms a chemical element.
The Avogadro's number tells us number of atoms, ions, or molecules in one mole of any substance.
This number is equal to 6.02214076 × 10^23.
To find the atoms of aluminum in the can, we first convert to number of moles
Number of moles of Aluminium =Mass/Molar mass
Number of moles of Aluminium =15.8 grams/26.982 g/mol
Number of moles of Aluminium =0.5855moles
Now ,
According to Avogadro constant is 1 mole = 6.02 x10^23
Therefore, 0.5855moles=0.5855moles x ( 6.02x 10^23)= 3.524X 10 ^23 atoms of Aluminium
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If you hear on the news that the epicenter of an earthquake is at "Union City," this means:
the earthquake started directly below Union City
the earthquake's focus was at the surface in Union City
the earthquake destroyed Union City
Answer:
B
Explanation:
What defines an Arrhenius base?
Answer:
An Arrhenius base is a compound that increases the OH − ion concentration in aqueous solution. The reaction between an Arrhenius acid and an Arrhenius base is called neutralization and results in the formation of water and a salt.
Explanation:Hope this helps :)
What is the volume of 1 mole of gas at standard temperature and pressure
Answer:
22.414 dm3
Explanation:
this is the answer
Who knows any four object in which all three States of matter co-exist
Answer:
Water
Explanation:
It is because water can be in a solid state which is ice, liquid state which is the water and gas which is the steam that comes from water
Explanation:
water as a matter could co-exist in four forms
A car gets 23.7 miles per gallon of gasoline. A full tank of gasoline contains 75.0 liters. How many miles can this car travel on a full tank of gasoline show me step by step the formula
Answer:
Explanation:
3.79 liters in one gallon.
75.0 / 3.79 = 19.79 gallons of gasoline
19.8 x 23.7 = 469 miles per tank
List the following molecules in order of increasing boiling point: Br2, Cl2, F2, I2.
Answer:
1. None of these have hydrogen bonding.
2. None of these have dipoles.
3. Bigger molecules will have stronger London dispersion forces. So I2 has the strongest forces,
and F2 will have the weakest. Correspondingly, I2 will have the highest boiling point and F2 will have the lowest boiling point.
Answer: F2, Cl2, Br2, I2
Explanation:
The order of the boiling points of the given molecules are required.
The required order is [tex]F_2,Cl_2,Br_2[/tex] and [tex]I_2[/tex].
The boiling points of the molecules are
[tex]Br_2=58.8^{\circ}\text{C}[/tex]
[tex]Cl_2=-34.04^{\circ}\text{C}[/tex]
[tex]F_2=-188.13^{\circ}\text{C}[/tex]
[tex]I_2=184.4^{\circ}\text{C}[/tex]
So, the increasing order of the boiling points are [tex]F_2,Cl_2,Br_2[/tex] and [tex]I_2[/tex].
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List the number of each type of atom on the right side of the equation
MgS(aq)+2CuCl2(aq)→2CuS(s)+MgCl2(aq)
I get the left side correct, but not the right. Not sure what I am doing wrong.
Answer: 2 copper, 2 Sulfur, 1 Magnesium, 2 Chlorine.
Explanation:
Wasn't sure if this was what you were looking for, but thought if you got the left side that was all you needed?
Phosphorous pentachloride decomposes according to the reaction
PCl5(g)=PCl3(g)+Cl2(g)
A 12.3 g sample of PCl5 is added to a sealed 1.50 L flask and the reaction is allowed to come to equilibrium at a constant temperature. At equilibrium, 31.8% of the PCl5 remains. What is the equilibrium constant, Kc, for the reaction?
Question is asking for Kc
Answer: The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
Explanation:
Initial concentration of [tex]PCl_5[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}\times Volume in L}}=\frac{12.3g}{208.2g/mol\times 1.50L}=0.039M[/tex]
Equilibrium concentration of [tex]PCl_5[/tex] = [tex]\frac{31.8}{100}\times 0.039=0.012M[/tex]
The given balanced equilibrium reaction is,
[tex]PCl_5(g)\rightleftharpoons PCl_3(g)+Cl_2(g)[/tex]
Initial conc. 0.039 M 0 M 0 M
At eqm. conc. (0.039-x) M (x) M (x) M
Given : (0.039-x) = 0.012
x = 0.027
The expression for equilibrium constant for this reaction will be,
[tex]K_c=\frac{[Cl_2]\times [PCl_3]}{[PCl_5]}[/tex]
Now put all the given values in this expression, we get :
[tex]K_c=\frac{0.027\times 0.027}{0.012}=0.061[/tex]
The equilibrium constant, [tex]K_c[/tex], for the reaction is 0.061.
what is the equation relating to the energy separation between levels in the H atom to the number of the level (n) called?
Answer: https://study.com/academy/answer/complete-the-sentence-concerning-the-energy-level-diagram-for-the-hydrogen-atom-the-equation-relating-the-energy-separation-between-levels-in-the-h-atom-to-the-number-of-the-level-n-is-called-the-equation.html#:~:text=Answer%20and%20Explanation%3A,is%20called%20the%20Bohr's%20equation.
Bohr's equation
Explanation: https://study.com/academy/answer/complete-the-sentence-concerning-the-energy-level-diagram-for-the-hydrogen-atom-the-equation-relating-the-energy-separation-between-levels-in-the-h-atom-to-the-number-of-the-level-n-is-called-the-equation.html
Answer and Explanation: The equation relating the energy separation between levels in the H atom to the number of the level (n) is called the Bohr's equation.
I need help on this question on standard enthalpy of formation
Answer:
B: Na(s) + Cl2(g) + 3O2(g) = 2NaClO3(s)
Explanation:
We are looking for enthalpy of formation, so we want to see reactance in their natural standard form.
Thus, we want to see the reactance of Na, Cl2 and O2.
The only option that has the correct form of Na, Cl2 and O2 is B.
Na(s) + Cl2(g) + 3O2(g) = 2NaClO3(s)
How is a kcal or Calorie different from a calorie?
Answer: It is different.
Explanation:
kcal is math while calorie is different in nutrition.
(5) Discuss 5 Features of soft water
Explanation:
1. It is high in sodium
2. Has low percentage of hardness minerals such as magnesium and calcium.
briefly describe bohr's model postulates and its limitations.
Answer:
Bohr's Model postulates-
I postulate - The electrons in an atom orbit around the nucleus in definite circular paths called orbits or shells.
II Postulate - Each shell or orbit represents a specific amount of energy.
III Postulate - By emitting or absorbing energy, an electron may shift from one stationary energy orbit to another.
Three main Limitations -
1- It adjusts to the hydrogen atom's spectrum but not to the spectra of other atoms.
2 - In the definition of the electron as a tiny particle that spins around the atomic nucleus, the wave properties of the electron are not described.
3- Bohr is unable to understand why classical electromagnetism is inapplicable to his model. That is why, when electrons are in a stationary orbit, they do not emit electromagnetic radiation.
Explanation:
About Bohr's postulates-
1 - The electron spins in circling circles around the nucleus, emitting no energy. The orbital angular momentum is constant in these orbits.
Only certain radii of orbits, corresponding to certain given energy levels, are required for electrons in an atom.
2- Not every orbit is possible. However, whenever an electron is in a legal orbit, it is in a state of unique and constant energy and does not emit energy (stationary energy orbit).
For example - The energies allowed for electrons in the hydrogen atom are given by the following equation: The Rydberg constant for the hydrogen atom is [tex]-2.8\times10^-^1^8[/tex] in this equation, and n = quantum number will range from 1 to ∞. For each of the values of n, the electron energies of a hydrogen atom produced by the above equation are negative. As n rises, the energy becomes less negative and thus rises.
3- By emitting or absorbing energy, an electron may shift from one stationary energy orbit to another.
The energy difference between the two states would be equal to the energy released or consumed. This energy E is in the form of a photon, and it can be measured using the following formula:
[tex]E=h[/tex][tex]v[/tex]
E is the energy (absorbed or emitted) in this equation, and h is the Planck constant (its value is [tex]6.63\times10^-^3^4 Js[/tex]) and v denotes the frequency of light, which is calculated in 1/ s.
Carbon dioxide is a green house gas that is linked to global warming. It is released into the atmosphere through the combustion of octane (C8H18) in gasoline. Write the balanced chemical equation for the combustion of octane. (Use the lowest possible whole number coefficients. Omit states-of-matter from your answer.)
Answer:
Mass of octane needed = 49.87 g
Explanation:
1.Convert 2.37 moles of Al(NO3)3 to grams.. Single choice.
(25 Points)
0.011 grams
504.8 grams
438 grams
633 grams
0.0089 grams
2.Convert 456.89 grams of O2 to moles.. Single choice.
(25 Points)
28.6 moles
7.14 moles
14620 moles
14.3 moles
29241 moles
Answer:
1. 504.8 g Al(NO3)3
2. 14.3 moles O2
Explanation:
1.
g = moles x molar mass = 2.37 x 212.996 = 504.8 g Al(NO3)3
MM Al(NO3)3 = 212.996 g/mol
2.
moles = mass : molar mass = 456.89: 32 = 14.3 moles O2
Name the following binary compound
A.CA3N2
B.ALCL3
C.MGS
D.SO2
E.NO
F.PCL3
Answer:
A,Calcium nitride
B,Aluminum chloride
C,Magnesium sulfide
D,Sulfur dioxide
E,Nitrogen monoxide
F,Phosphorus trichloride
Some types of bar soap will float in water. What are the dispersed particles?
Answer:
cell's
Explanation:
Can y’all help me with this question
Answer:
owa owa
Explanation:
owa owa owa owa owa ow
Which substance will form a solution when mixed with solid sodium chloride?
A. Cl2(g)
B. NaO2(s)
C. CCI4(I)
D. CH3OH(i)
Answer:
NaO2
Explanation:
Solutions are mixtures that are homogenous and comprise solutes and solvents. Methyl alcohol will react with solid sodium chloride to form a solution. Thus, option D is correct.
What are the solutions?The solutions are the mixtures of the solute and the solvent. The solute and the solvent are capable of forming a solution only if they both are either polar or nonpolar.
Here, chlorine is a gas, and sodium superoxide is a solid that cannot react with solid sodium chloride to make a solution and hence is eliminated. As sodium chloride is polar it cannot react with nonpolar carbon tetrachloride.
Methyl alcohol is polar and so is sodium chloride. They will react together as,
CH₃OH + NaCl → CH₃Cl + NaOH
Therefore, option D. CH₃OH will react to form a solution.
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Scientists have concluded that the uppermost part of the mantle is partially-molten. Which observation helped them reach this conclusion?
Both P and S waves slow down when they reach this layer.
Both P and S waves speed up when they reach this layer.
P waves do not travel through this layer.
S waves do not travel through this layer.
Answer:
Both P and S waves slow down when they reach this layer
Explanation:
The asthenosphere is the uppermost part of the mantel and is also called the magma chamber. This layer s partly molten in the state is tectonically weak and is a ductile region. It almost solid and seismic waves tend to be relatively slow through the asthenosphere. The upper-most part of the asthenosphere is believed to be of great rigidity and the brittle lithosphere.Identify and explain the process shown below. Name any two products obtained during this process and state their uses.
Answer:
This is heating limestone
Explanation:
Process:
limestone is heated strongly. After a while, the limestone begins to go cloudy. Test tube is heated too much that it is beginning to soften it. After removing limewater, test tube cools down, the pressure in the test tube drops and air pressure pushes the cold the liquid into the hot test tube with terrible result.
Products:
Limestone is also known as calcium carbonate and Limewater
Click on the link provided to show the video
https://youtu.be/RLL5rT_DeKc
or search heating calcium carbonate
you will find a video
Meaning of chemistry
Answer:
Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
Explanation:
hope thats helps
16. You dribble a basketball while walking on a basketball court, List and describe the pairs of action-reaction forces in this situation,
Answer:
1. While walking you push on the ball and the ball pushes on your hand .
2. Also the ball hits the ground and the ground pushes back on the ball .
3. Lastly you walk on the ground with your feet and the ground pushes back on you.
Explanation:
Hope this helps! :) Plz mark as brainliest!
Mg + HCl → MgCl2 + H2
How many liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal?
52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
What is Ideal Gas Law ?The ideal gas law states that the pressure of a gas is directly proportional to the volume and temperature of the gas.
It is expressed as
PV = nRT
where,
P is pressure
V is volume in liters
n is number of moles of gas
R is Ideal gas constant
T is Temperature in kelvin
What is Balanced Chemical equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now first we have to write the balanced chemical equation
Mg + 2HCl → MgCl₂ + H₂
Here we can se that 2 mole of hydrochloric acid produces 1 mole of hydrogen gas.
So 4 moles of hydrochloric gas will give [tex]\frac{1}{2} \times 4[/tex] moles of hydrogen gas that is 2 moles of hydrogen gas.
Now put the values in above equation, we get
PV = nRT
0.940 atm × V = 2 × 0.0821 L atm / K mol × 298
V = [tex]\frac{2 \times 0.0821\ \text{L atm / K mol} \times 298}{0.940\ \text{atm}}[/tex]
V = 52.05 liter
Thus from the above conclusion we can say that 52.05 liters of hydrogen gas are produced at 298 K and 0.940 atm if 4.00 moles of hydrochloric acid react with an excess of magnesium metal.
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