Answer:
Masses in atomic mass units for the HD molecule by approximating the masses H and D with their mass numbers is explained below in complete detail.
Explanation:
Two volumes M1 and M2 are located on a rigid weightless rod in a rigid rotor position. Energy in a rigid rotator example: E = BJ(J+1) where, B = h/8pi2Ic, B is rotational regular, I is moment of inertia = ur2 where u is decreased mass = m1m2/m1+m2.
FOR HD MOLECULE: mass, u = mass of H*mass of D/mass of H + D. Atomic mass unit =1.67*10^-27 kg. So, u = 1*1.67*10-24 * 2*1.67*10-24 / 1.67*10-24+2*1.67*10-24 = 1.67*10-24*2/3 = 1.11*10-24 g.
balance the following chemical equation
Na+I2->NaI
Balanced equation : 2Na+I₂⇒2NaI
Further explanationEqualization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:
• 1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.
• 2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product
• 3. Select the coefficient of the substance with the most complex chemical formula equal to 1
Reaction
Na+I₂⇒NaI
Give coefficient :aNa+bI₂⇒NaI
Make an equation :Na, left=a, right=1⇒a=1
I, left=2b, right=1⇒2b=1⇒b=0.5
Equation becomes :
Na+0.5I₂⇒NaI x 2
2Na+I₂⇒2NaI
1. What factors can change the attractive force between the nucleus of an atom and
its valence electrons?
Answer:
Ionization Energy
Explanation:
Factors such as nuclear charge and distance of electrons to the nucleus
affect the attractive force between the nucleus of an atom and its valence
electrons.
The closer the electron to the nucleus the higher the attractive force.
Nucleus possesses an attractive force for stability which is stronger in
electrons in close proximity with it.
We should also note that the higher the nuclear charge, the stronger the
attractive force and vice versa.
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Atom and Periodic table vocabulary:
1. The mass on the periodic table.
2. Particles that differ in number between isotopes.
3. Vertical column in the periodic table.
4. Atoms of the same element that have different masses.
5. All elements in the same one of these has the same number of energy levels in their electron cloud.
6. The smallest form of matter that still retains the properties of an element.
key:
Neutrons
Quark
Average atomic mass
Isotopes
Group
Period
Answer:
1. The mass on the periodic table.
Average atomic mass
2. Particles that differ in number between isotopes.
Neutrons
3. Vertical column in the periodic table.
Group
4. Atoms of the same element that have different masses.
Isotopes
5. All elements in the same one of these has the same number of energy levels in their electron cloud.
Period
6. The smallest form of matter that still retains the properties of an element.
Quark
Explanation:
Using the equation pH = -log [H+], determine the pH of a solution with a hydrogen ion concentration, or [H+], of 1x10-5. HINT: look at his HCl example!
pH = 7
pH = 1
pH = 5
pH = 2
Answer:
the answer is pH of 7 I don't no Hydrochloric hijinx work
The equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.
What is solution?Solution is defined as a continuous variation of two or more substances in their relative proportions up to what is known as the limit of solubility. Light beams do not disperse in the presence of a solution. In contrast, a suspension of particles might result in Tyndall or Rayleigh scattering. The amount of heat that is released or absorbed during the dissolving process is known as the enthalpy change of solution.
pH is defined as a measurement of how basic or acidic aqueous or other liquid solutions are. A solution's pH is a significant indicator of its chemical composition. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
pH = -log[H+]
pH = -log[1.0 x 10⁻⁵]
pH = 5
Thus, the equation pH = -log [H+], the pH of a solution with a hydrogen ion concentration is 5. Hence option c is correct.
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The compound C2E10H12 (where E is an element) has a formula mass of approximately 144 g/mol. What is the atomic mass of E?
Answer:
Explanation:
C₂E₁₀H₁₂ = 144
molecular weight of given compound
= 2 x 12 + 10 x E + 12 x 1 = 144 ( atomic weight of C = 12 , H = 1 , E = E )
24 + 10 E + 12 = 144
10 E = 108
E = 10.8
Atomic mass of E = 10.8 u .
Trees often lose their leaves in the winter. Explain what this tree will not be able to do without its leaves.
Answer:
Most aren't able to take in carbon dioxide gas from the air or produce any oxygen.
Explanation:
science bro
look at the picture below of an astronaut at two different distance from a planet. in which position A and B would there be a stronger gravitational pull between the astronaut and the planet? Explain
please help please please please please please please please please help it's due right now at 8:20pm please please help please really need help please
Answer:
B
Explanation:
Gravitational pull is stronger when the person is closer to the planet.
The gravitational force is the fundamental force of the universe. Here the astronaut at position B will experience a stronger gravitational pull as compared to the astronaut at position A.
What is gravitational force?The gravitational force is defined as the force of attraction between any two bodies is directly proportional to the product of their masses and is inversely proportional to the square of the distance among them.
F = G m₁m₂ / r²
The gravitational force decreases with the increase in the distance. So here distance of astronaut at position B which is closer to the planet experience greater gravitational pull.
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Which of the three goals of Persuasive Speaking is the hardest to achieve?
a.
weaken attitudes, beliefs or values
b.
strengthen attitudes, beliefs or values
c.
change attitudes, beliefs, or values
d.
motivate to action
Answer:
C
Explanation:
edge2021!!
Answer: The correct answer is c. change attitudes, beliefs or values.
Explanation:
Of these goals, the hardest to achieve is changing attitudes, beliefs, and values. It is difficult to convince an audience to truly change their attitudes, beliefs, or values based on your presentation since it typically requires establishing trust and respect on a personal level.
science vocab (image attached)
Answer:
Solution-a liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).
solvent- able to dissolve other substances.
solute- the minor component in a solution, dissolved in the solvent.
colloid- a homogeneous noncrystalline substance consisting of large molecules or ultramicroscopic particles of one substance dispersed through a second substance. Colloids include gels, sols, and emulsions; the particles do not settle, and cannot be separated out by ordinary filtering or centrifuging like those in a suspension.
suspension- is a heterogeneous mixture that contains solid particles sufficiently large for sedimentation.
Explanation:
What architectural achievement of Nebuchadnezzar II is considered one of the Seven Wonders of the Ancient World? EXPLAIN. IF YOU DONT I WILL REPORT YOU
Answer:
D
Explanation:
The architectural achievement of Nebuchadnezzar II which is considered one of the Seven Wonders of the Ancient World is the Hanging Gardens of Babylon.
The Hanging Gardens were said to be a lush and elaborate terraced garden complex located in the city of Babylon, in present-day Iraq. According to ancient accounts, the gardens were built by Nebuchadnezzar II in the 6th century BCE as a gift to his wife Amytis, who missed the green hills and gardens of her homeland.
The gardens were renowned for their impressive engineering and beauty. They were designed to resemble a large artificial mountain, with ascending terraces supported by vast stone columns and arches. Each terrace was filled with a variety of plants, trees, and flowers, creating a mesmerizing display of color and fragrance.
Hence, the architectural achievement of Nebuchadnezzar II is considered one of the Seven Wonders of the Ancient World is Hanging Gardens
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Which of the following is not a balanced nuclear equation?
O a) 130 Sn + B + 1315b
d) 19Pt → 158 Os+ja
c) Be → 19 Li + AB
b) 2U → 1a +
234
90
Th
Ne
Answer:
¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β
Explanation:
To know which equation is unbalanced, we shall compare the mass number and atomic number of the reactant and product together. This is illustrated below:
¹²¹₅₀Sn —> ⁰₋₁β + ¹²¹₅₁Sb
121 = 0 + 121
121 = 121
50 = –1 + 51
50 = 51
Thus the above equation is balanced
¹⁹⁰₇₈Pt —> ¹⁸⁶₇₆Os + ⁴₂α
190 = 186 + 4
190 = 190
78 = 76 + 2
78 = 78
Thus, the above equation is balanced
¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β
10 = 10 + 0
10 = 10
4 = 3 + (–1)
4 = 3 – 1
4 = 2
Thus, the above equation is unbalanced.
²³⁸₉₂U —> ⁴₂α + ²³⁴₉₀Th
238 = 4 + 234
238 = 238
92 = 2 + 90
92 = 92
Thus, the above equation is balanced.
From the illustrations made above, only ¹⁰₄Be —> ¹⁰₃Li + ⁰₋₁β
Is unbalanced.
What is the molecular structure of H2O?
Answer:
A water molecule consists of two hydrogen atoms and one oxygen atom. The three atoms make an angle; the H-O-H angle is approximately 104.5 degrees. The center of each hydrogen atom is approximately 0.0957 nm from the center of the oxygen atom.
Explanation:
how must carbon and vanadium combine to form a metallic compound?
Answer:
In general, metal and nonmetals combine to form ionic compounds
Explanation:
How many H atoms in Mg(OH)2
Answer:
Explanation:
There are 2.
In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds.
Two double bonds means that the total number of electrons being shared in the molecule is
two.
four.
six.
eight.
Answer: D) Eight
Just pretend this part doesn't exist nope nothing to see here the answer is correct on edge2020 I swear on my brainly points
Answer:
d
Explanation:
Help pleaseeeeeeeee with this question
Answer:
(C) Vacuum
Explanation:
Consider the following unbalanced equation:
C2H5OH(g) + O2(g) → CO2(g) + H2O(l)
1.86 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm and 25°C?
The total volume of gas present (in L) : 14.04 L
Further explanationReaction(balanced) :
C₂H₅OH(g) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)
mol C₂H₅OH(MW=46,07 g/mol) :
[tex]\tt \dfrac{1.86}{46.07}=0.04[/tex]
mol O₂(MW=32 g/mol) :
[tex]\tt \dfrac{10}{16}=0.625[/tex]
Limiting reactant :
[tex]\tt \dfrac{0.04}{1}\div \dfrac{0.625}{3}=0.04\div 0.21\rightarrow C_2H_5OH~limiting~reactant[/tex]
mol CO₂ =
[tex]\tt \dfrac{2}{1}\times 0.04=0.08[/tex]
mol O₂(unreacted) :
[tex]\tt 0.625-(3\times 0.04)=0.505[/tex]
Conditions at T 25 ° C and P 1 atm are stated by RTP (Room Temperature and Pressure). Vm(molar volume) in this condition = 24 liters / mol
Total volume of gas :
volume O₂+volume CO₂ =
[tex]\tt 0.505\times 24+0.08\times 24=12.12+1.92=14.04~L[/tex]
How many elements are in NaC2H302?
why specific gravity test is done ?
Answer: Urinary specific gravity (SG) is a measure of the concentration of solutes in the urine. It measures the ratio of urine density compared with water density and provides information on the kidney's ability to concentrate urine. A urinary specific gravity measurement is a routine part of urinalysis. A urine specific gravity test compares the density of urine to the density of water. This quick test can help determine how well your kidneys are diluting your urine. Urine that's too concentrated could mean that your kidneys aren't functioning properly or that you aren't drinking enough water.
Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!!!! :D
Explanation:
What mass of sodium hydroxide will neutralize completely 3.612 moles of HCl?
Answer:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
So answer B.
Explanation:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The balanced reaction is
NaOH + HCl = NaCl + H2O
To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH is required.
mass of NaOH =Mole× Molar mass of NaOH
mass of NaOH=3.612× 40 g/mol
mass of NaOH=144.48g
Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
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What gives yeast cells what it needed to reproduce and grow?
Answer:
Yeasts reproduce asexually by a process called budding (see Figure 8.2. 1 and Figure 8.2. 6). A bud is formed on the outer surface of the parent cell as the nucleus divides.
Explanation:
Most of the elements in the periodic table can be described as:
A. metalloids
B. halogens
c. non-metals
D. metals
The answer would be metals :)
A 0.98 gram sample of a volatile liquid was heated to 348 k. the gas occupied 265 ml of space at a pressure of 0.95 atm. what is the molecular weight of this gas?
Answer:
The molecular weight is [tex]Z = 111.2 \ g/mol[/tex]
Explanation:
From the question we are told that
The mass of the sample is [tex]m = 0.98 \ g[/tex]
The temperature is [tex]T = 348 K[/tex]
The volume which the gas occupied is [tex]V = 265 \ ml = 265 *10^{-3} L[/tex]
The pressure is [tex]P = 0.95 \ atm[/tex]
Generally from the ideal gas equation we have that
[tex]PV = n RT[/tex]
Here n is the number of moles of the gas while the R is the gas constant with value [tex]R = 0.0821 \ atm \cdot L \cdot mol^{-1} \cdot K^{-1}[/tex]
[tex]n = \frac{PV}{ RT}[/tex]
=> [tex]n = \frac{ 0.95 * 265 *10^{-3} }{ 0.0821 * 348}[/tex]
=> [tex]n = 0.00881 \ mol[/tex]
Generally the molecular weight is mathematically represented as
[tex]Z = \frac{m}{n}[/tex]
=> [tex]Z = \frac{0.98 }{0.00881}[/tex]
=> [tex]Z = 111.2 \ g/mol[/tex]
is 4 Fe + 3 O2 --> 2 Fe2O3
balanced?
Answer:
Yes the given equation is balanced.
Explanation:
Chemical equation:
Fe + O₂ → Fe₂O₃
Balanced chemical equation:
4Fe + 3O₂ → 2Fe₂O₃
There are four iron and six oxygen atoms on both side of equation thus the given equation is balanced.
The given reaction also follow the law of conservation of mass.
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
This reaction is synthesis reaction:
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
A + B → AB
What does bacteria cell and plant cell have in common
Answer:
They both have a cell wall
Explanation:
Draw the Lewis structure for the polyatomic amide anion(NH2-). Be sure to include all resonance structures that satisfy the octet rule.
Answer:
Following are the solution to this question:
Explanation:
Following are the lewis structure of the [tex]NH_2^{-}[/tex]:
In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. So, the graph for the given element is defined in the attached file.
The Lewis structure for the amide anion can be shown as in the given figure.
What is Lewis structure?
Lewis structures, also known as Lewis dot formulas, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
In the given element two H and one N are used, in which N has 5 valance electrons, and one H has 1 valence which is equal to 2 electrons valance. The Lewis structure for the amide anion can be shown
Hence, this is the required answer.
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Which statement best describes visible light?
a. The human eye can only detect visible light as white light.
b. Visible light can only be seen with special equipment or technology.
c. Visible light makes up a small part of the electromagnetic spectrum.
d. The frequency of visible light is the same as the frequency of gamma rays.
(URGENT I NEED THIS RIGHT AWAY) (waves)
Answer:
The Visible Spectrum Visible light is the light that we can see, and thus is the only light detectable by the human eye. White light is visible light, and it contains all the colors of the rainbow, from red to violet. The range of visible wavelengths is 400 to 700 nanometers.
Explanation:
Discuss an example of evidence astronomers have learned about the universe using gamma rays, x-rays, and/or UV rays mounted on satellites. What impact has this information had on humans? What impact might this information have on humans in the future?
Answer:
Science tells us that light is the reason we are able to see objects. Without light, we wouldn't be able to process the visible world. ... The electromagnetic spectrum is the range of all types of electromagnetic radiation, including visible light, infrared light, ultraviolet light, X-rays, and gamma rays.
Explanation:
i hope this is right :)
Help me Guys please I need help with this My step sister is here and she's a demon and annoying Can I have good ideas what to do
Answer:
Lock her in the bathroom
Explanation:
Answer:
Ayoo
Explanation:
How many moles of gas at 58° C does it take to fill a 1.75 L flask to a pressure of 12.5 kPa? Please help I will give brainliest
Answer:
0.008 moles of gas are present
Explanation:
Given data:
Volume of gas = 1.75 L
Number of moles = ?
Temperature of gas = 58°C
Pressure of gas = 12.5 KPa
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
58+273 = 331 K
Pressure = 12.5/101 = 0.12 atm
by putting values in formula:
0.12 atm× 1.75 L = n× 0.0821 atm.L/ mol.K ×331 K
0.21 atm.L = n× 27.17atm.L/ mol
n = 0.21 atm.L /27.17atm.L/ mol
n = 0.008 mol