How many total moles of ions are released when each of the following dissolves in water?
(a) 0.734 mol of Na₂HPO₄
Answers
Thus total mole of ion = 1.47 + 0.734 = 2.202 mol
what are moles?In chemistry, a mole is a standard scientific unit for measuring significant amounts of extremely small things such as atoms, molecules, or other designated particles. It is also spelt mol.
The mole denotes a massive amount of units, 6.02214076 1023. On May 20, 2019, the General Conference on Weights and Measures defined the mole as this quantity for the International System of Units (SI). Previously, the mole was defined as the number of atoms determined empirically to be present in 12 grammes of carbon-12. In honour of the Italian physicist Amedeo Avogadro, the number of units in a mole is also known as Avogadro's number or Avogadro's constant (1776–1856). Equal quantities of gases under the same circumstances, according to Avogadro, contain the same number of molecules.
learn more about moles refer
brainly.com/question/21911991
#SPJ4
Related Questions
what reaction type is solid sodium bicarbonate + acetic acid?
Answers
Answer:
the neutralization reaction occurs
- According to collision theory, what is not a factor that determines if two molecules will bind?
A. The direction the molecules are facing.
B. The speed the molecules are traveling.
C. The specific heat of the molecules.
D. What element the molecules are.
Answers
The factor which will not determines if two molecules will bind according to collision theory is the direction the molecules are facing
What is collision theory?Collision theory is a theory which describes of predicting the rate at which chemical reactions occurs between atoms and molecules of elements.
So therefore, the factor which will not determines if two molecules will bind according to collision theory is the direction the molecules are facing
Learn more about collision theory:
https://brainly.com/question/20628781
#SPJ1
A solution has a pH of 4. 20. Using the relationship between pH and pOH, what is the concentration of OH−? A. 9. 9 × 10-1 M B. 6. 2 × 10-1 M C. 6. 3 × 10-5 M D. 6. 7 × 10-6 M E. 1. 6 × 10-10 M.
Answers
1.6 x 10⁻¹⁰ M is the concentration of OH− ion of the solution has a pH of 4.20.
How we calculate the pH of any solution?pH of any solution is define as the negative logarithm of the concentration of hydrogen ions i.e. pH = -log[H⁺].
Equation of pH will be written in the form of base 10 by removing the log as:
[H⁺] = \(10^{-pH}\)
Given value of pH is 4.20 and concentration of H⁺ ions will be calculated as:
[H⁺] = 10⁻⁴°²⁰
[H⁺] = 6.3 × 10⁻⁵
Now the relation between pH & pOH in term of base 10 is:
[H⁺][OH⁻] = 10⁻¹⁴
[OH⁻] = 10⁻¹⁴ / [H⁺]
[OH⁻] = 10⁻¹⁴ / 6.3 × 10⁻⁵ = 1.6 x 10⁻¹⁰ M
Hence, option (E) is correct i.e. 1.6 x 10⁻¹⁰ M.
To know more about pH and pOH, visit the below link:
https://brainly.com/question/10313314
explain why doesn't the 3rd equivalence point show up in the titration curve when h3po4 is titrated with naoh
Answers
The 3rd equivalence point does not show up in the titration curve when H3PO4 is titrated with NaOH due to the nature of H3PO4 being a polyprotic acid with a tightly held third proton, which cannot be completely neutralized with the standard NaOH solution used in titration.
The 3rd equivalence point does not show up in the titration curve when H3PO4 is titrated with NaOH because of the nature of the acid. H3PO4 is a polyprotic acid, meaning that it can donate multiple protons in a sequential manner. In the case of H3PO4, it can donate up to three protons.
During titration with NaOH, the first proton is neutralized at the first equivalence point, resulting in the formation of H2PO4-. At the second equivalence point, the second proton is neutralized, resulting in the formation of HPO42-. However, at the third equivalence point, the third proton is not completely neutralized.
This is because the third proton in H3PO4 is much more tightly held compared to the first two protons due to the decreasing acidity of the molecule as more protons are lost. As a result, it is difficult to completely neutralize the third proton with the standard NaOH solution used in titration, and thus, the third equivalence point does not show up in the titration curve.
In summary, the 3rd equivalence point does not show up in the titration curve when H3PO4 is titrated with NaOH due to the nature of H3PO4 being a polyprotic acid with a tightly held third proton, which cannot be completely neutralized with the standard NaOH solution used in titration.
learn more about solution
https://brainly.com/question/2968833
#SPJ11
Help plz (will mark brainleist)
Answers
Answer:
energy disturbance easy
Two magnets push away from
each other and do not attract.
What do we know to be true and
what type of force is being
demonstrated?
write 2 or more sentences
Answers
When two magnets are repelling each other, the following are true:
They are faced each with similar poles (negative + negative or positive + positive).When two magnets are placed with similar poles, the lines of force are in opposing directions and must repel one another.What are magnets?
A magnet is a substance or item that generates a magnetic field. This magnetic field is invisible, but it is responsible for a magnet's most remarkable property: a force that attracts or repels other ferromagnetic elements such as iron, steel, nickel, cobalt, and so on.
Magnets are classified into three types: perpetual magnets, temporary magnets, and electromagnets. Permanent magnets produce a magnetic field without requiring any external magnetism or electrical power.
Learn more about magnets:
https://brainly.com/question/2841288
#SPJ1
Describe what a phosphodiester bond connects in the double helix.
Answers
The phosphodiester bond connects for the double helix with the 3 carbon atom of the one sugar molecule and with the 5 carbon atom of the another molecule.
The phosphodiester bond links with the 3 carbon atom of the one sugar molecule and with the 5 carbon atom of the another and therefore, the name, is called as 3', 5' phosphodiester linkage. The saccharide groups that are derived from the deoxyribose in the DNA and the ribose in the RNA.
The Phosphodiesters are the negatively charged at the pH 7. The phosphodiester bond is the chemical bond that will forms when the two hydroxyl groups in the phosphoric acid will react with the other hydroxyl group on the other molecules.
To learn more about phosphodiester bond here
https://brainly.com/question/13286747
#SPJ4
Hi! This is a science question...
Which of the following is NOT an example of acceleration?
speeding up
slowing down
remaining at rest
stopping
Answers
Answer:
C: remaining at rest
Explanation:
Acceleration (a) is the change in velocity (Δv), remaining at rest is not changing the velocity.
Explain why CH3-CH2-CH2-OH is miscible in both water and hexane, C6H14, when hexane and water are barely soluble in each other.
Answers
A molecule is known as miscible when it dissolves in another molecule, resulting in a homogeneous solution. Ethanol (CH3-CH2-CH2-OH) is a molecule that is soluble in both water and hexane, despite the fact that water and hexane are barely soluble in each other. The solubility of ethanol in both water and hexane can be explained by the hydrogen bonding between the molecules.
why CH3-CH2-CH2-OH is miscible in both water and hexane when hexane and water are barely soluble in each other:
When two liquids with distinct polarities are combined, the solubility of the mixture is frequently determined by the strength of the intermolecular forces between the two liquids' molecules. Hydrogen bonds exist in water molecules, which is a highly polar liquid. Hexane, on the other hand, is a nonpolar liquid that contains only London dispersion forces between molecules.
Ethanol is a polar molecule with a polar hydroxyl group (OH) and a nonpolar hydrocarbon chain. Ethanol is capable of interacting with both polar and nonpolar molecules due to its polar/nonpolar characteristics. The nonpolar hydrocarbon chain of ethanol interacts with the nonpolar hexane molecules through London dispersion forces, while the polar hydroxyl group interacts with the polar water molecules through hydrogen bonds.
As a result of the hydrogen bonding between ethanol and water, ethanol is miscible in water. When ethanol and hexane are mixed, the London dispersion forces between the nonpolar molecules of hexane and ethanol's nonpolar hydrocarbon chain are sufficient to overcome the intermolecular forces that hold hexane molecules together. Ethanol can interact with both polar and nonpolar substances due to its polar and nonpolar regions. As a result, ethanol is miscible in both water and hexane.
to know more about polar and nonpolar substances visit:
https://brainly.com/question/27009376
#SPJ11
beta decay is nuclear decay in which an electron is emitted from an atom. if the electron is given 0.95 mev of kinetic energy, what is its velocity, as a fraction of the speed of light? you will have to assume the electron is moving relativistically.
Answers
We can use the relativistic energy-momentum relation to solve this problem Therefore, the velocity of the electron is approximately 0.999999954 times the speed of light.
Relativistic effects are observed when the speed of an object approaches the speed of light. At these speeds, the object's kinetic energy and momentum increase significantly, and classical equations for energy and momentum no longer hold true. Instead, special relativity equations must be used to calculate the object's behavior.
To know more about speed visit :
https://brainly.com/question/17661499
#SPJ11
3. Predict the change in electronegativity of the next elements in a row (C, Si), then check those properties. Do they match your predictions?
Answers
The elements which come after 'C' and 'Si' are 'Ge' and 'Sn'. The element 'F' is the most electronegative element. Down the group the electronegativity generally decreases.
What is electronegativity?The electronegativity of an atom is defined as the relative tendency or power of the bonded atom in a molecule to attract the shared pair of electrons towards itself.
In general the electronegativity decreases on moving down a group. The increase in the size of atoms and the shielding effect of inner electrons decreases the electronegativity.
Here 'Ge' and 'Sn' comes below 'C' and 'Si'.
Thus the electronegativity of the elements after 'C' and 'Si' decreases.
To know more about electronegativity, visit;
https://brainly.com/question/14481608
#SPJ1
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Why does the reactivity of metals increase from right to left on the periodic table?
Metals on the right have fewer protons, making it harder to attract electrons from other atoms.
Metals on the right have more protons, causing valence electrons to be held more strongly.
Metals on the right have more valence energy levels, so the ability of the nucleus to attract electrons is reduced.
Metals on the right have fewer valence energy levels, so electrons are closer to the nucleus and harder to pull away.
Which feature is unique to Group 18 nonmetals?
They have more exceptions to reactivity rules.
They are very nonreactive.
They are very reactive.
They follow a different pattern of reactivity.
Which of the following combination of elements is the most reactive?
Na and Br
Cs and Br
Cs and I
K and I
How does Rb bond with other elements?
Rb loses two electrons.
Rb gains two electrons.
Rb loses an electron.
Rb gains an electron.
Answers
The characteristics of the reactivity of the periodic table allows to find the correct answers to the different questions are:
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
1) The reactivity of a chemical element is the tendency to combine with others, this increases as it has fewer electrons in its last layer and since they are more weakly bonded.
Consequently, halogens have seven electrons in their last shell tends to attract an electron to remain with the full level and the alkaline that an electron has in the last shell tends to lose the electron to remain with a complete shell.
If we examine the periodic table the number of electrons in the last shell decreases from right to left.
Let's review the different claims:
a) False. The elements on the right side have a higher atomic number, therefore more protons.
b) True. The elements have more protons therefore it has to attract other electrons and the reactivity decreases.
c) False. As it has more electrons, it has more energy levels, losing all the electrooens is more difficult, so the reactivity decreases.
d) False. By having more electrons it has more energy levels.
2) What is the unique characteristic of the elements of group 18
The elements of group 18 are the noble gases, they have their last full layer therefore they do not have.
the correct answer is: They are very nonreactive.
3) The reactivity in the period table decreases with increasing period therefore the element of period 3 is the most reactive in this case Sodium and Halogen of group 5 is the most reactive in this case Bromine.
the compound Na and Br is the most reactive of all.
4) Rubidium has 1 electron in its last shell, both in a chemical reaction pole loses the electron.
the correct answer is: Rb loses an electron
In conclusion, using the characteristics of the reactivity of the periodic table, we can answer the different questions..
1) Metals on the right have more protons, causing valence electrons to be held more strongly.
2) They are very nonreactive.
3) Na and Br
4) Rb loses an electron
Learn more here: brainly.com/question/20970885
The whole Patterns of Reactivity Quick Check for Honors Chemistry is
1) B. Metals on the right have more protons, causing valence electrons to be held more strongly.
2) B. by gaining electrons
3) B. They are very nonreactive
4) A. Cs and Br
5) A. Rb loses an electron
a gas at 110 kpa and 30oc fills a flexible container with an initial volume of 4.00 l. if the temperature is raised to 80oc and the pressure increased to 245 kpa, what is the new volume?
Answers
The new volume of the gas is 2.38 L when the temperature is raised to 80°C and the pressure is increased to 245 kPa.
Given:
P1 = 110 kPa
V1 = 4.00 L
T1 = 30°C = 30 + 273.15 K = 303.15 K
P2 = 245 kPa
T2 = 80°C = 80 + 273.15 K = 353.15 K
Use the combined gas lawc, which states:
(P1V1) / (T1) = (P2V2) / (T2)
Where:
P1 and P2 are the initial and final pressures, respectively.
V1 and V2 are the initial and final volumes, respectively.
T1 and T2 are the initial and final temperatures, respectively.
Substitute these values into the equation:
(110 kPa × 4.00 L) / (303.15 K) = (245 kPa × V2) / (353.15 K)
Now, let's solve for V2:
(110 kPa × 4.00 L × 353.15 K) = (245 kPa × V2 × 303.15 K)
(176860 kPaLK) = (74235 kPa × V2 × K)
Dividing both sides by 74235 kPa × K:
(176860 kPaLK) / (74235 kPa × K) = V2
V2 = 2.38 L
To learn more about the volume, follow the link:
https://brainly.com/question/28058531
#SPJ4
based on vsepr theory, what is the approximate cˆnˆh bond angle in glycine? explain.
Answers
In glycine, the approximate CˆNˆH bond angle is 109.5 degrees. This is so because it is an amino acid made up of two hydrogen atoms on either side of a core carbon atom, a nitrogen atom, and a sulphur atom.
The carbon and nitrogen atoms form a linear geometry in accordance with VSEPR theory, and the two hydrogen atoms at either end of the line form two angles. Since the nitrogen and carbon atoms are in the same group, they repel one another equally, resulting in a 109.5 degree bond angle. Since it is smaller than the angle of a conventional tetrahedron, which would be 109.5 degrees, this angle is referred to as a "bent" angle.
As a result of the attraction between the two electronegative atoms, the CˆNˆH bond angle in glycine is a little shorter than the typical tetrahedral angle.
To learn more about VSEPR theory visit:
https://brainly.com/question/14225705
#SPJ4
what does salt and iron have in common
Answers
Answer:
The simple answer is that they are all crystals.
Explanation:
Most people when they think of crystals think of Diamond, Quartz, Rubies and other gemstones. However, there are many more crystals all around us in the world.
Can someone help me plz
Answers
Answer:
d
Explanation:
i think
What are the characteristics of carbon bonds? Check all that apply.
insoluble in water
electrolytes
covalent bonding
high melting point
slow reaction rate
no triple bonds
high activation energies to begin reactions
Answers
Explanation:
1, insoluble in water
3, covalent bonding
5, slow reaction rate
7, high activation energies to begin reactions
voltage-gated sodium channels at a neuron's initial segment are triggered to open when the membrane becomes more positive. (True or False)
Answers
Answer: True
Explanation:
It is true because Voltage-gated sodium channels are ion channels found in the membranes of neurons, specifically at the initial segment or axon hillock. These channels are responsible for generating and propagating action potentials, which are electrical signals that allow neurons to communicate with each other.
For the balanced equation shown below, how many moles of N2 will react with the 0.3034 moles of Mg.
3Mg + N2 --> Mg3N2
**i think it needs to be rounded to the tenth
Answers
Answer:
0.1 moles of N2 will react with 0.3034 moles of Mg.
Explanation:
\(\sf{balanced \ eqaution = 3Mg + N2 \rightarrow Mg3N2}\)
0.3034 moles of Mgusing molar ratio:
3Mg : N2
3 : 1
moles of N2:
\(\hookrightarrow \sf\frac{0.3034 }{3} *1\)
\(\hookrightarrow \sf 0.10113 \ moles \ of \ N2\)
what type of bond will result if the atoms below combine? the electronegativity of each atom is given.
Answers
The type of bond that will result if the atom Cs and F combine will be an electrovalent bond or ionic bond.
Caesium belongs to Group 1 in the periodic table with an electronegativity of 0.79.
Group 1 elements are also known as alkali metals.
And the other compound which is mentioned in the question is Fluorine F. It belongs to the family of halogen with electronegativity of 4.0. Group 7 in the periodic table is halogen family.
As their is high electronegativity difference between group 1 metals and group 7 elements so ionic bond is formed between them
Therefore, Cs and F form Cs F via electrovalent bonding or ionic bonding with one another.
Your question is incomplete most probably your full question was
What type of bond will result if the atoms below combine? The electronegativity of each atom is given.
Cs0.79
F4.0
Learn more about ionic bond here:
brainly.com/question/11527546
#SPJ4
Clarity of signal
Analog
And
Digital
I just need these two questions and I’m done will give 28 points. Its for science
Answers
Does the gemstone amethyst have an ionic bond or a covalent bond? how do you know?
Answers
Amethyst is a type of quartz, and quartz generally has a covalent bond. A covalent bond is formed when atoms share electrons to complete their outer electron shells.
In the case of amethyst, the silicon and oxygen atoms in the quartz structure share electrons to form a network of covalent bonds. This strong bond structure gives quartz its characteristic hardness and durability. Ionic bonds, on the other hand, are formed when atoms transfer electrons to form charged ions. Since amethyst does not involve the transfer of electrons, it is more accurate to say that it has a covalent bond. In conclusion, amethyst has a covalent bond due to the sharing of electrons between its silicon and oxygen atoms.
More on Amethyst: https://brainly.com/question/316469
#SPJ11
In which of these diatomic molecules would you NOT find an octet of electrons
around each atom? *
Nitrogen, N2
Hydrogen H2
Oxygen, 02
Fluorine, F2
Answers
Answer:
The hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
Explanation:
Let's evaluate each case.
1. Nitrogen (N₂):
With Z = 7, nitrogen has the following electronic configuration
1s²
2s² 2p³ → valence electrons
Since its valence electrons are 5, in the molecule one nitrogen atom shares 3 electrons with the other one, and each remains with an electron pair, so each atom has an octet of electrons.
2. Hydrogen (H₂):
With Z = 1, its electronic configuration is:
1s¹ → valence electron
In the molecule, the hydrogen atoms share the only electron they have, so they will have only 2 electrons around. In this diatomic molecule, we can not find an octet.
3. Oxygen (O₂):
Z = 8. Electronic configuration:
1s²
2s² 2p⁴ → valence electrons
In the diatomic molecule, each oxygen atom shares 2 electrons with the other one and remains with 2 pairs of electrons, therefore, each oxygen atom has an octet.
4. Fluorine (F₂)
Z = 9. Electronic configuration:
1s²
2s² 2p⁵ → valence electrons
In this molecule, each fluorine atom shares 1 electron with the other and remains with 3 pairs of electrons, hence, each fluorine atom has an octet of electrons around.
Finally, we can say that the hydrogen molecule is the only one in which can not find an octet of electrons around each atom.
I hope it helps you!
Predict the charge that a strontium ion would have. 2- 1+ 2+ 4 - 6-
Answers
The charge that a strontium ion would have is +2.
The strontium atom has a 38th atomic number. A metal called strontium reacts with water and burns in the air.
The strontium atom's electrical structure is [Kr]2s².
Two electrons are located in the fifth outer orbital of the strontium atom.
Clearly demonstrate that the strontium ion's electrical configuration is Sr(+2).
The two electrons from the outermost 5S orbital fly out when strontium enters an ionic state.
because the potential energy in this outermost orbital is the largest.
Therefore, we can state that the strontium ion will have a 2+ charge.
Learn more about Strontium Ion, visit,
brainly.com/question/2031834
#SPJ4
The graph above represents an object moving with a __________________. A) constant velocity B) constant acceleration C) constant positive acceleration D) constant negative acceleration
Answers
Answer: I think its C or B
Explanation: Hope this was helpful....
order the steps to show how energy is trranformed in plant cells
Answers
Solar energy is converted into chemical energy i.e. glucose with the help of photosynthesis.
What is photosynthesis?Photosynthesis is the process in which light energy is converted to chemical energy in plant cells. In cellular respiration, plants use the chemical energy that is stored during the process of photosynthesis. Photosynthesis is a process in which plants convert energy from the sun into usable energy that is used by the cells in different activities. Plants use the light energy of the sun, carbon dioxide, and water to make glucose and oxygen. The glucose is stored in different parts of the plant while on the other hand, the oxygen is released in the atmosphere.
So we can conclude that with the help of the photosynthesis process, Solar energy is converted into chemical energy.
Learn more about energy here: https://brainly.com/question/13881533
#SPJ1
Which of these is the most powerful force of weathering and erosion?
wind
ice
gravity
moving water
Answers
Answer:
Moving water
Explanation:
Answer:
moving water is the answer
Explanation:
:)
Plz help plz... I’ve been trying to decide but I really can’t understand
Answers
Answer: you have to be sure to cite evidence
describe what gas pressure is. explain how concentration and temperature both effect gas pressure in a sealed container.
Answers
Gas pressure can be described as the force exerted per unit area by gas molecules as they collide with the surface of a container. It is a measure of the average kinetic energy of the gas molecules.
The pressure of a gas depends on several factors including the temperature, the volume, and the number of gas molecules present in a container. Changes in temperature and concentration can have an effect on gas pressure within a sealed container.Concentration can affect gas pressure because increasing the number of gas molecules in a container will result in more collisions and a greater force being exerted on the container walls. The pressure of the gas will increase. If the concentration of gas molecules decreases, then there will be fewer collisions and the pressure of the gas will decrease.Temperature is another important factor that can affect gas pressure. According to Charles' Law, if the temperature of a gas increases, then the volume of the gas will also increase. This is because the gas molecules will be moving faster and will require more space to move around in. The pressure of the gas will increase. An increase in concentration or temperature will lead to an increase in gas pressure, while a decrease in concentration or temperature will lead to a decrease in gas pressure.For such more questions on Gas pressure
https://brainly.com/question/30235826
#SPJ8
in some communities forest are cleared through burning in the deforested and is used for farming which of these is negative consequences of this practice
Answers
Explanation:
High emission of CO2 which is bad and the wild animals which live in that spot will flee, thus that place will eventually lose much more ecological diversity.