Suppose an oxygen atom has 8 protons and 7 electrons. How woud it be classified?
a. Trick question. This isn't oxygen at all becuase the number of protons is not correct.
b. Negative ion of Oxygen
c. Neutral Oxygen atom
d. Positive ion of Oxygen
Answers
In this question, an oxygen atom has 8 protons and 7 electrons. Based on this information, the atom would be classified as a: positive ion of Oxygen. The correct answer is option (D).
Positive ions are atoms that have lost one or more electrons, resulting in a net positive charge. In this case, the oxygen atom has one more proton than electron, which means that it has a positive charge. Therefore, it would be classified as a positive ion of Oxygen.
Atoms are made up of protons, neutrons, and electrons. The number of protons in an atom's nucleus determines the element to which the atom belongs. The number of electrons orbiting around the nucleus is equal to the number of protons, which gives the atom a net neutral charge. However, when an atom loses one or more electrons, it becomes a positively charged ion.
In the case of the given question, the oxygen atom has eight protons and only seven electrons. This means that it has a net positive charge and would be classified as a positive ion of oxygen. It is important to note that a neutral oxygen atom would have the same number of protons and electrons, which is eight.
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Related Questions
are hydrogen bonds in water stronger than water's electrostatic attraction to many ions?
Answers
Answer:
Each molecule of liquid water is involved in approximately four hydrogen bonds with strengths significantly lower than covalent bonds but significantly greater than natural thermal energy. ... Even a very small reinforcement of hydrogen bonds can have a major impact on normal metabolism.
Explanation:
(8336) how are aviation fuels, which possess greater antiknock qualities than 100 octane, classified?
Answers
Aviation fuels that possess greater antiknock qualities than 100 octane are classified as high-octane fuels.
These fuels have an octane rating higher than 100, indicating their superior resistance to knocking or detonation in high-performance engines. The specific classification of high-octane aviation fuels may vary depending on the specific regulatory standards and industry practices, but they are generally formulated to meet the demanding requirements of aircraft engines, which often operate at high speeds and altitudes.
Hence, octane is aviation fuel.
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Please help How many moles of a gas sample are in 5.0 L container at 215 K and 342 kPa(The gas constant is 8.31 L kPa/mol K) Round your answer to one decimal place and enter the number only with no units.
Answers
Answer
1.0 mol
Explanation
Given:
Volume, V = 5.0 L
Temperature, T = 215 K
Pressure, P = 342 kPa
The gas constant, R = 8.31 L kPa/mol K
What to find:
The number of moles of the gas sample.
Step-step-solution:
The number of moles of the gas can be determine using the ideal gas equation formula:
\(PV=nRT\)Put the given values into the formula and calculate for n:
\(\begin{gathered} 342\times5.0=n\times8.31\times215 \\ 1710=1786.65n \\ \text{Divide both sides by 1786.65} \\ \frac{1710}{1786.65}=\frac{1786.65n}{1786.65} \\ n=0.9571\text{ mol} \\ To\text{ one decimal place,} \\ n=1.0\text{ mol} \end{gathered}\)The number of moles of the gas sample is 1.0 mol.
what is an example of an organic molecule made and used by organisms
Answers
Answer:Nucleic acid,glucose,and amino acids
Answer question 7. Circle the largest atom or ion in each grouping (I will give brainliest)
S, S^2-, Cl
Al, Al^3+, Mg
Sb, Se, Se^2+
Ca, K^1-, Ca^2+
Be^2+, Be, Na
Answers
According to the atomic radius, the largest atom or ion in each grouping are – \(S^2^-\), \(Mg\) , \(Sb\) , \(Ca\) , \(Na\) .
A measure of the size of an atom is the atomic radius of a chemical element, which is normally the average distance between the core of the nucleus and the outermost isolated electron. There are several non-equivalent descriptions of atomic radius since the border is not a clearly defined physical object.
Since the net nuclear charge steadily rises as a result of higher electron attraction to the nucleus, the radius of atoms decreases across a period. However, as the number of shells in each atom grows along the group, the atomic radius increases.
Neutral atoms typically become larger down a group and smaller across a period. The radius of a neutral atom increases or decreases as it acquires or releases an electron, becoming an anion or cation, respectively.
In the given groupings, the size of the atoms and ions according to the atomic radius is as follows:
\(S^2^- > S > Cl\)
\(Mg > Al > Al^3^+\)
\(Sb > Se^2^- > Se\)
\(Ca > K^+ > Ca^2^+\)
\(Na > Be > Be^2^+\)
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The temprature at which a solid melts is the same as the temprature at which its luqid form solidifies.TRUE OR FALSE.PLS GUYS HELP ME!
Answers
Answer:
The statement is true
Explanation:
The temperature at which a solid melts is the same as the temperature at which its liquid solidifies
its answer is true cause the temprature of melting ice is same as the liquid solidifies
The chemical formula for carbonic acid, a compound used in carbonated drinks, is H2CO3. Assume that these symbols represent the three elements of this compound:
Which picture correctly represents carbonic acid?
A.
B.
C.
D.
Answers
Option A correctly represents the structure of carbonic acid.
What is the carbonic acid?Carbonic acid is a compound that is composed of three elements which are carbon, hydrogen and oxygen. This compound is important in the production of carbonated soft drinks that are usually sold in shops. There are three atoms of oxygen, two atoms of hydrogen and one atom of carbon in the compound.
Now, we can see in the question that red refers to atoms of oxygen, grey refers to atoms of hydrogen and ash refers to the atoms of carbon. We now want to know which diagram represents the structure of carbonic acid.
From the images, we can see that option A correctly represents the structure of carbonic acid.
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quizzlet consider a component made of joined copper and iron pieces that will be exposed to salt water conditions as pictured here (top image labels what is what). which placement(s) of a plastic coating (a, b, c, or d below) could be used to prevent galvanic corrosion?
Answers
The placement of a plastic coating (a, b, c, or d below) that could be used to prevent galvanic corrosion would depend on the type of plastic coating being used and the specifics of the joined copper and iron pieces that are exposed to salt water conditions.
Generally, a plastic coating should be applied to prevent any direct contact between the copper and iron pieces. Placement “a” and “b” could both be used, as they would create a barrier between the two pieces, while placement “c” and “d” would not be as effective because there would still be direct contact between the two pieces.
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If the reaction of 91.3 grams of C3H6 produces a 81.3% yield, how many grams of CO2 would be produced?
Answers
Answer:
81.3 a
Explanation:
Just search up answers on wolframalpha.com
Identify each molecule below as either a polar molecule or a nonpolar molecule. Explain your reasoing.
Oxygen Carbon dioxide
Answers
Answer:
Why then is carbon dioxide a nonpolar molecule while water is a polar molecule? Carbon dioxide is a nonpolar molecule because its atoms equally share the electrons. Water is polar because its atoms share the electrons unequally.
Explanation:
Oxygen and Carbon dioxide molecules are non polar.
What is Non-polarity?Non-polarity is defined as molecules in which the bonds are equal. This is
as a result of the electrons being shared equally.
In the case of Oxygen molecules, the electrons are equally distributed
between the two oxygen atoms which is a feature of a non polar
substance.
Carbon dioxide have dipoles which cancel each other out thereby
resulting in an equal distribution of electrons.
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alkanes,
General Formula: C, H 2n+2
Carbon Names Molecular Formula
C2H6
Ethane
Unknown No. of
Carbon (n)
Ex. If n= 2
1.If n = 4
2. If n= 5
3. If n = 7
4. If n = 8
5. If n= 9
Answers
Firstly ALKANES FORMULA IS CnH2n+2
C4H10 Butane
C5H12 Pentane
C7H16 Hectane
C8H18 Octane
C9H20 Nonane
The solubility of lead(II) iodide is 0.064 g/100 mL at 20oC. What is the solubility product for lead(II) iodide?
a.1.1 × 10−8
b.3.9 × 10−6
c.1.1 × 10−11
d.2.7 × 10−12
e.1.4 × 10−3
Answers
To determine the solubility product for lead(II) iodide (PbI₂).The solubility product for lead(II) iodide (PbI₂) is approximately 1.9 x 10^-8.
The solubility product (Ksp) expression for lead(II) iodide is:
PbI₂ ⇌ Pb₂⁺ + 2I⁻
Given that the solubility of PbI₂ is 0.064 g/100 mL,.Molar mass of PbI₂ = (207.2 g/mol) + 2*(126.9 g/mol) = 461 g/mol
The solubility of PbI₂ can be calculated as:
0.064 g / (461 g/mol) = 0.000139 M
Ksp = [Pb₂⁺][I⁻]^2
Since PbI₂ dissociates into 1 Pb₂⁺ ion and 2 I⁻ ions:
Ksp = (0.000139 M)(0.000139 M)^2 = 1.9 x 10^₋8
Therefore, the solubility product for lead(II) iodide (PbI₂) is approximately 1.9 x 10^-8.
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30 POINTS PLEASE HELP ME I NEED YALL PLEASE
Answers
6CO2 + 6H2O → C6H12O6 + 6O2
glucose produced = 1/6 x 23.6 = 3.93 moles
Answer:59/150
Explanation:
Which energy level has the highest amount of energy? A First B Second C Third D Fourth
Answers
The Energy levels that has the highest amount of energy is Fourth; option D
What are energy levels of electrons?
Energy levels or electron shells are fixed distances from the nucleus of an atom of an element where electrons are most probably to be found.
The energy levels are arranged in increasing energy levels from the nucleus of the atom.
The energy levels are given integer values of n, where n = 1, 2, 3, 4, 5,..
This means that the lowest energy level is the first one closest to the nucleus also known as ground state.
Therefore, the energy level which has the highest amount of energy from the given options is the fourth energy level.
In conclusion, electrons in atoms are arranged in energy levels starting from the first energy level closest to the nucleus.
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what is zinc's atomic number?
Answers
The atomic number of zinc is 30.
Generally, the atomic number is simply defined as the number of protons present in an atom. Due to this reason, atomic number is also sometimes known as the proton number. During the calculations, atomic number is usually denoted by the capital letter Z. The symbol Z is derived from the a German word zahl, which means number of numeral, or atomzahl, which is a more modern word which means atomic number.
The atomic number is basically the number of protons present in the nucleus of an atom. The number of protons are used to define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present in the atom, identity depends upon the number of protons.)
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If 1.4555 g of phenyl bromide are involved in the Grignard reaction, how many millimoles of phenyl bromide are present
Answers
To calculate the number of millimoles of phenyl bromide present, we need to first convert the given quantity of phenyl bromide (1.4555 g) into moles by dividing it by its molar mass.
The molar mass of phenyl bromide is the sum of the molar masses of its constituent atoms, which is 157.01 g/mol.
Therefore, the number of moles of phenyl bromide present is:
1.4555 g / 157.01 g/mol = 0.0092711 mol
To convert this into millimoles, we need to multiply it by 1000:
0.0092711 mol x 1000 = 9.2711 mmol
Therefore, there are 9.2711 millimoles of phenyl bromide present in the Grignard reaction. It is important to accurately measure the amount of reactants involved in a reaction to determine the stoichiometry and yield of the reaction.
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What equation explains the relation between amperes, watts and volts?
Answers
The international space station (ISS) is 109 m long by 75 m wide and has a volume of about 932 m3 . Assuming air is about 70% nitrogen and 20% oxygen, how many molecules of each are approximately in the ISS knowing that the pressure is 1 atm and the temperature 293 K? Additionally, since the average person exhales 0.500 m3 of CO2 per day, which is about 1 kg, if the oxygen and CO2 scrubber system cuts outs, estimate how long do four astronauts have on the ISS before the air is no longer breathable and they pass out knowing humans need at least 80% of oxygen to keep vital organs healthy. (rO2 = 1.429 kg/m3 and rCO2 = 1.977 kg/m3 )
Answers
Approximately 2.22 x \(10^2^5\) molecules of nitrogen and 6.29 x \(10^2^4\)molecules of oxygen are present in the International Space Station (ISS). If the oxygen and CO2 scrubber system fails, four astronauts on the ISS have approximately 73 hours before the air becomes unbreathable and they risk losing consciousness.
The ISS has a volume of approximately 932\(m^3\). Given that air is approximately 70% nitrogen and 20% oxygen, we can calculate the number of molecules of each gas present in the ISS.To calculate the number of molecules, we need to use the ideal gas law equation, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.First, we convert the volume of the ISS to liters: 932 \(m^3\) = 932,000 liters.
Next, we calculate the number of moles of each gas using the ideal gas law equation. The pressure is given as 1 atm, and the temperature is 293 K.
For nitrogen:
PV = nRT
(1 atm)(932,000 L) = n(0.0821 L·atm/(mol·K))(293 K)
n ≈ 2.93 x \(10^4\) moles
For oxygen:
PV = nRT
(1 atm)(932,000 L) = n(0.0821 L·atm/(mol·K))(293 K)
n ≈ 8.29 x \(10^3\) moles
Finally, we convert the number of moles to the number of molecules by multiplying by Avogadro's number (6.022 x \(10^2^3\) molecules/mol).
For nitrogen:
2.93 x \(10^4\) moles × 6.022 x \(10^2^3\) molecules/mol ≈ 2.22 x \(10^2^5\) molecules
For oxygen:
8.29 x \(10^3\) moles × 6.022 x \(10^2^3\) molecules/mol ≈ 6.29 x \(10^2^4\) molecules
Therefore, approximately 2.22 x \(10^2^5\) molecules of nitrogen and 6.29 x \(10^2^4\) molecules of oxygen are present in the ISS.
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HCL is pure covalent compound but soluble in solvent water why
Answers
Answer:
HCl is a polar covalent compound, because of electronegativity difference between Cl(3.5) and hydrogen (2). Hence in this way, the bond between HCl breaks and they formed ions in the polar solvent like water .
Why can you see someone clearly through a clear glass window but not through a frosted glass window?
A.Clear glass reflects light, but frosted glass absorbs light.
B.Clear glass transmits light, but frosted glass scatters light.
C.Clear glass transmits some light, but frosted glass
absorbs all light.
D.Clear glass scatters some light, but frosted glass transmits all light.
Answers
Answer:
Clear glass reflects light, but frosted glass absorbs light. Clear glass transmits light, but frosted glass scatters light
Explanation:
This type of bonding can be described as a "cooperation" A. lonic B. metallic C. covalent
Answers
Answer:
Covalent
Explanation:
C. Covalent
The type of bonding which can be described as a "cooperation" is covalent bonding as there is sharing of electrons.
What is covalent bonding?
Covalent bonding is defined as a type of bonding which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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Multiple Choice:
1. The diagram shows a chromatogram of several inks, which statement is correct?
●
●
Separation Techniques
black
brown
blue
ina nan
a. Yellow may be present in green ink.
b. Yellow ink can be used to make brown ink.
green
red
&
Brown ink can be made by mixing blue and red inks.
d. Black ink can be made by mixing green, red and yellow inks.
of
Answers
The diagram shows a chromatogram of several inks, which means the statement that is correct is Yellow may be present in green ink and is denoted as option A.
What is Chromatography?
This refers to a laboratory technique which involves the separation of a mixture into its various components and it comprises of two types of phases which can be seen below:
Mobile phaseStationary phaseThe mobile phase refers to the fluid solvent which is added to the mixture and moves according to their solubility differences while the stationary phase is the material in which they move on.
In the chromatogram given, we can see that yellow and green have the same solubility which means that yellow may be present in green ink.
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explain the process of vulcanization(help im in class8)!!!
Answers
Explanation:
a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.
Answer:
Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.
Explanation:
Juan measured the temperature of salt water. he then added 273 temperature units to the measured temperature value. which temperature conversion is juan most likely doing?
Answers
Celcius to Kelvin
Temperature is defined as the degree or intensity of heat present in a substance It is measured using a thermometer and other equipment. The temperature can be measured in Kelvin, Celsius, and Fahrenheit.
What is Temperature ?Temperature is a physical quantity, thermometers. The units in which can be measured by Celcius, and Fahrenheit. Temperature is measured can be Kelvin,
These units are interconvertible and have certain conversion factors.For example, the conversion factor for Celcius to Kelvin is:0° Celcius = 273 Kelvin
In the given situation, Juan is using the conversion factor of Celcius to Kelvin.Celsius to Kelvin temperature conversion juan most likely to do
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I would like to know if question number 3 is rite
Answers
The balanced reaction of this chemical reaction is as follows :
\(2HClO_4(aq)\text{ + Ba}(OH)_2(aq)\text{ }\Rightarrow Ba(ClO_4)_2(aq)+2H_2O(l)\text{ }\)• As we can see, this is a double-displament reaction
apply scientific language effectively
Answers
When people are involved in science, they try to employ terminology that is more precise and consistent.
Scientific languageThe language of communication used by those involved in science aims to be more exact and consistent. Science frequently provides new words with precise definitions in the technical language as well as giving scientific meanings to words that may have various usages in everyday English. a computer language, such as ALGOL, FORTRAN, or APL, intended for matrices and formulas in mathematics. Although this type of processing is supported by all programming languages, using statements from a scientific language makes it simpler to communicate these processes.To learn more about scientific language refer:
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How many molecules are in 5.50 moles of sulfer dioxide
Answers
Answer:
(5.50) ( 6.02 *10^23)
Explanation:
The number of molecules equals the number of moles times Avagadro's number.
please help! Chemistry is not my subject! Thanks
Answers
Answer:
the answer is B
Al(s) ⇒ Al3+(aq) + 3e-
and Au+(aq) + e- ⇒ Au(s)
Which of the following statements on HPLC modes is true? A. Increasing the polarity of the mobile phase decreases the elution time of polar compounds in normal-phase HPLC B. A non-polar stationary phase is used in normal-phase HPLC C. Compounds have a lower attraction to the mobile phase than to the stationary phase in displacement development D. A polar stationary phase is used in reversed-phase HPLC E. More polar compounds elute first in normal-phase HPLC
Answers
The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).
The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.
There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.
More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.
Thus, the correct option is E.
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Cyclohexene oxidation with potassium permanganate gives three different products, depending on conditions. what product (one) could not be obtained
Answers
Answer:
will you help us with that one please