Final answer:
To determine the pH at which an amino acid with pK1 and pK2 values of 2.1 and 8.8 is predominantly ionized, we need to calculate its isoelectric point (pI), which typically is the pH where it's a zwitterion. Without further structural information or clarification on the ionization state, we can't specify the exact pH, but around physiological pH, amino acids are generally zwitterionic.
Explanation:
The ionization state of amino acids in solution is dependent on the surrounding pH and the pKa values of the ionizable groups present within the amino acid structure. Given that the pK1 and pK2 values are 2.1 and 8.8 respectively, to determine at which pH the amino acid is predominantly ionized as shown, we need to consider the amino acid's isoelectric point (pI). The isoelectric point is the pH at which the amino acid exists as a zwitterion, having no net electric charge. Since amino acids have a carboxyl group (-COOH) with a typically low pK value and an amino group (-NH2) with a much higher pK value, amino acids will have a net positive charge at pH values below their pI and a net negative charge at pH values above their pI.
For amino acids with pKa values as indicated, the pI can often be approximated as the average of the two pKa values. However, without specific structural information or the exact nature of the ionization state mentioned in the question, it's difficult to pinpoint the exact pH without additional context. Generally, in a physiological pH of 7.4, amino acids with carboxyl and amino groups would exist predominantly in the zwitterionic form, not fully ionized in either direction.
What substance takes part in an enzymatic reaction, but is unchanged by the reaction?
The carbon-carbon bond in ethylene, h2cch2, results from the overlap of __________. sp3 hybrid orbitals
The carbon-carbon bond in ethylene, h2cch2, results from the overlap of sp2 hybrid orbitals.
The correct option is (D).
1. Hybridization in Ethylene:
- Ethylene [tex](\( \text{H}_2\text{C}=\text{CH}_2 \))[/tex] is a molecule composed of two carbon atoms double-bonded to each other and each carbon atom is also bonded to two hydrogen atoms.
- The carbon atoms in ethylene undergo sp2 hybridization to form the π bond between them.
2. Explanation of sp2 Hybridization:
- In sp2 hybridization, one ( s ) orbital and two ( p ) orbitals of the carbon atom combine to form three sp2 hybrid orbitals.
- These sp2 hybrid orbitals are arranged in a trigonal planar geometry with bond angles of approximately 120 degrees.
- One of the sp2 hybrid orbitals overlaps with an sp2 orbital from the other carbon atom to form the σ bond between the two carbon atoms.
- The remaining two sp2 hybrid orbitals on each carbon atom form sigma bonds with hydrogen atoms.
3. Formation of the π Bond:
- The remaining unhybridized ( p ) orbital on each carbon atom is perpendicular to the plane formed by the sp2 hybrid orbitals.
- These unhybridized ( p ) orbitals overlap laterally to form the π bond between the carbon atoms.
- This lateral overlap of the ( p ) orbitals allows for the formation of the π bond, which is responsible for the double bond character between the carbon atoms in ethylene.
4. Conclusion:
- Thus, the π bond in ethylene results from the overlap of unhybridized ( p ) atomic orbitals, making option D) sp2 hybrid orbitals the correct answer.
complete question given below:
The π bond in ethylene, H2C=CH2, results from the overlap of ________. A) sp3 hybrid orbitals B) s atomic orbitals C) sp hybrid orbitals D) sp2 hybrid orbitals E) p atomic orbitals
Why is a foaming antacid tablet fizzing in water a chemical change?
A foaming antacid tablet fizzing in water is a chemical change because it involves a chemical reaction that produces new substances, namely carbon dioxide gas.
Explanation:A foaming antacid tablet fizzing in water is considered a chemical change because it involves a chemical reaction that produces new substances. When the tablet comes in contact with water, it reacts with the water to release carbon dioxide gas. This reaction is known as an acid-base reaction, in which the active ingredient in the antacid tablet reacts with the water, producing carbon dioxide gas bubbles.
This chemical reaction can be represented by the following equation:
Active ingredient + Water → Carbon dioxide gas + Other products
The formation of new substances, in this case, the production of carbon dioxide gas, is a characteristic of a chemical change.
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is waste water a pure subtance or a mixture
Hydrogen is 99% hydrogen-1; 0.8% hydrogen-2; and 0.2% hydrogen-3. calculate it's average atomic mass
sorry, don't know
sorry, don't know
The azide ion, n−3, is a symmetrical ion, all of whose contributing structures have formal charges. draw three important contributing structures for this ion.
The azide ion N3- can actually be represented by 3 resonance structures.
(check attached image for the structures)
Among the three, the Structure 1 is the most important one. While structure 3 almost makes no contribution due to the positive charges located on the adjacent atoms and the overall higher formal charge.
Azide ion has [tex]\boxed{{\text{three}}}[/tex] resonating structures (For structures, refer to the attached image).
Further Explanation:
The bonding between the different atoms in covalent molecules is shown by some diagrams known as the Lewis structures. These also show the presence of lone pairs in the molecule. These are also known as Lewis dot diagrams, electron dot diagrams, Lewis dot structures or Lewis dot formula. In covalent compounds, the geometry, polarity, and reactivity are predicted by these structures.
When more than one Lewis structures are possible for a single molecule but no single structure is able to explain all the properties of the molecule then resonance is used. All the structures thus formed are called resonating structures and the phenomenon is known as resonance. The resonance structures have the same placement of atoms but different locations of bond pairs and lone pairs of electrons. Moreover, various resonating structures can be converted to each other by moving lone pairs to bonding positions, and vice-versa.
The general rules that we follow to draw the resonance structures are as follows:
a. The [tex]\pi[/tex] electrons or a lone pair of electrons can change their positions while the position of atoms remains fixed.
b. The count of the valence electrons in all the resonating structure should be same.
c. The transfer of electrons is shown by the curved arrows.
d. The resonating structure must follow octet rule that is all atoms should have 8 electrons
Conditions to determine more contributing resonating structures are as follows:
1. Smaller formal charges are always preferred over the larger one.
2. The stable structure has more delocalization of charges on the atoms.
3. A more negative formal charge must always be located on the most electronegative atom.
The resonating structures of azide ion are shown in the image attached.
Structure III is more stable than the other two. This structure has negative charge on more electronegative atom (N) and more delocalization of charge. While in structure I and II, nitrogen is having a positive charge so unstable.
Learn more:
1. The moles of [tex]{\text{NaOH}}[/tex] : https://brainly.com/question/4283309
2. The correct name of the compound: https://brainly.com/question/9535482
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Resonance
Keywords: resonating structures, azide, N3-, structure I, structure II, structure III, Lewis structures, smaller, larger, electronegative atom.
How many moles of zinc, Zn, are in 0.535g of zinc?
Answer: The amount of zinc for a given amount are 0.0082 moles.
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
We are given:
Given mass of zinc = 0.535 g
Molar mass of zinc = 65.4 g/mol
Putting values in above equation, we get:
[tex]\text{Moles of zinc}=\frac{0.535g}{65.4g/mol}=0.0082mol[/tex]
Hence, the amount of zinc for a given amount are 0.0082 moles
Which of the following features would be most affected by weathering
Answer: Glaciers
Explanation:
In a chemical reaction, the reactants contain 385 kJ of chemical energy, and the products contain 366 kJ of chemical energy.
In order for energy to be conserved, what must happen?
Answer: 19kJ of energy must be released
Explanation:
The specific heat of silver is 0.06 cal/g°C. Fifty grams of silver will require _____ calories to raise the temperature 1°C. A. 0.06 B. 3 C. 30 D. 833
For basic solutions, which element is added to balance half-reactions?
chlorine
hydroxide
iron
nitrogen
Answer: Hydroxide ion
Explanation: The question is to balance half -reactions in basic solutions(medium) and not to neutralize the basic solutions.
In acidic medium, half-reactions are balanced by adding [tex]H^+[/tex] and [tex]H_2O[/tex] where as the half-reactions in basic medium are balanced by adding [tex]OH^-[/tex] and [tex]H_2O[/tex] .
As the question asks about balancing half-reactions in basic solutions, the right choice is hydroxide ion.
Chlorine, Iron or nitrogen are not used for balancing half reactions.
Identify the atomic number and the chemical symbol for lead, silver, and gold. drag each item to the appropriate bin.
Answer :
The atomic number of lead is, 82. The chemical symbol of lead is, Pb.
The atomic number of silver is, 47. The chemical symbol of silver is, Ag.
The atomic number of gold is, 79. The chemical symbol of gold is, Au.
Explanation :
Atomic number : It is equal to the number of protons or electrons.
Atomic number = number of protons = number of electrons
Mass number : It is defined as the sum of number of protons and number of neutrons.
Number of neutrons = Mass number - Number of protons
As we know that:
Lead is a metal that belongs to group 14 and period 6. The atomic number of lead is, 82. The chemical symbol of lead is, Pb.
Silver is a transition metal that belongs to group 11 and period 5. The atomic number of silver is, 47. The chemical symbol of silver is, Ag.
Gold is a transition metal that belongs to group 11 and period 6. The atomic number of gold is, 79. The chemical symbol of gold is, Au.
You need to help a hunting companion with a deep, open chest wound. What should you do first?
To assist someone with a deep, open chest wound, ensure safety first and call for emergency help. Apply pressure to stop bleeding, cover the wound with a dressing, and seal on three sides if a pneumothorax is suspected. Monitor vital signs until help arrives.
If you need to help a hunting companion with a deep, open chest wound, the first thing to do is ensure your own safety by wearing gloves to avoid any potential transmission of blood-borne pathogens. Next, you should call for emergency medical help immediately. While waiting for help to arrive, the priority is to address any severe bleeding. If there's active bleeding, you apply direct pressure to the wound using a clean cloth or dressing. Do not attempt to clean the wound or push any protruding organs back in. Instead, you may cover the wound with a clean cloth or sterile dressing and seal it on three sides to create a flutter valve if you suspect a pneumothorax. This allows air to escape from the chest cavity without letting more air in. Keep the person calm and still, and monitor their breathing and pulse until medical professionals take over. Remember that in the case of a suspected pneumothorax, it's crucial not to completely seal the wound, as this could lead to a tension pneumothorax.
Water (H2O) forms when hydrogen gas (H2) and oxygen gas (O2) react according to the equation below: 2H2 +O2 → 2H2O What mass of water forms when 1.45 × 10-3 g O2 react completely? (Molar mass of O2 = 32.00 g/mol; molar mass of H2O = 18.02 g/mol)
The answer is A
1.63 × 10-3 g
-What is the frequency of a 5.6 x 10^10 cm wave?
-What is the wavelength of 0.1096 Hz wave?
What type of molecule is the molecule seen below? ch3—ch2—ch2—ch2 protein nucleic acid sugar lipid hydrocarbon?
A 325 ml sample of gas is initially at a pressure of 721 torr and a temperature of 32°c. if this gas is compressed to a volume of 286 ml and the pressure increases to 901 torr, what will be the new temperature of the gas (reported to three significant figures in °c)?
The new temperature of the given gas is [tex]\boxed{62.4\:^{\circ}\text{C}}[/tex].
Further Explanation:
An ideal gas is a hypothetical gas that is composed of a large number of randomly moving particles that are supposed to have perfectly elastic collisions among themselves. It is just a theoretical concept, and practically no such gas exists. But gases tend to behave almost ideally at a higher temperature and lower pressure.
The expression for the ideal gas equation is as follows:
[tex]\boxed{{\text{PV}} = {\text{nRT}}}[/tex] …… (1)
Here, P is the pressure of gas.
V is the volume of the gas.
T is the absolute temperature of gas.
n denotes the number of moles of gas.
R is the universal gas constant.
Rearranging equation (1), we get:
[tex]\frac{{PV}}{T} = nR[/tex]
For a particular gas, the number of moles (n) and the universal as constant (R) both are constants.
If a specific gas with [tex]{P_1}[/tex] , [tex]{V_1}[/tex] and [tex]{T_1}[/tex] as initial parameters is treated to the final parameters being [tex]{P_2}[/tex] , [tex]{V_2}[/tex] and [tex]{T_2}[/tex] . So equation (1) becomes
[tex]\frac{{{P_1}{V_1}}}{{{T_1}}} = \frac{{{P_2}{V_2}}}{{{T_2}}}[/tex] …… (2)
Here,
[tex]{P_1}[/tex] is the initial pressure of the gas.
[tex]{V_1}[/tex] is the initial volume of the gas.
[tex]{T_1}[/tex] is the initial temperature of the gas.
[tex]{P_2}[/tex] is the final pressure of the gas.
[tex]{V_2}[/tex] is the final volume of the gas.
[tex]{T_2}[/tex] is the final temperature of the gas.
Calculation of the final temperature [tex]\left({{{\mathbf{T}}_{\mathbf{2}}}}\right)[/tex] of the gas:
Rearranging equation (2), we get:
[tex]{T_2} = \frac{{{P_2}{V_2}{T_1}}}{{{P_1}{V_1}}}[/tex] …… (3)
Firstly, [tex]{T_1}[/tex] is to be converted into K. The conversion factor for this is,
[tex]{\text{0 }}^\circ{\text{C}} = {\text{273 K}}[/tex]
So [tex]{T_1}[/tex] is calculated as follows:
[tex]\begin{aligned}{\text{Temperature}}\left( {\text{K}} \right)&= \left({32 + 273}\right)\;{\text{K}}\\&=305\;{\text{K}}\\\end{aligned}[/tex]
The value of [tex]{P_2}[/tex] is 901 torr.
The value of [tex]{V_2}[/tex] is 286 mL.
The value of [tex]{T_1}[/tex] is 305 K.
The value of [tex]{P_1}[/tex] is s721 torr.
The value of [tex]{V_1}[/tex] is 325 mL.
Substitute these values in equation (3).
[tex]\begin{aligned}{T_2}&=\frac{{\left({{\text{901 torr}}}\right)\left({{\text{286 mL}}}\right)\left({{\text{305 K}}}\right)}}{{\left({{\text{721 torr}}}\right)\left({{\text{325 mL}}}\right)}}\\&={\text{335}}{\text{.40693 K}}\\\end{aligned}[/tex]
Conversion Factor:
[tex]{\text{0 K}} = -{\text{273}}^\circ{\text{C}}[/tex]
So the value of [tex]{T_2}[/tex] [tex]\left({^\circ{\text{C}}}\right)[/tex] is calculated as follows:
[tex]\begin{aligned}{T_2}&=\left( {{\text{335}}{\text{.40693}}-{\text{273}}}\right){\text{ }}^\circ {\text{C}}\\&={\text{62}}{\text{.40693 }}^\circ{\text{C}}\\&\approx{\mathbf{62}}{\mathbf{.4 ^\circ C}}\\\end{aligned}[/tex]
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2. Calculation of volume of gas: https://brainly.com/question/3636135
Answer details:
Grade: Senior School
Subject: Chemistry
Chapter: Ideal gas equation
Keywords: ideal gas, pressure, volume, absolute temperature, equation of state, hypothetical, universal gas constant, moles of gas, initial, final, K, conversion factor, 325 mL, 286 mL, 721 torr, 901 torr, 62.4 degree Celsius.
Use the periodic table to determine the electron configuration for Cl and Y in noble-gas notation. Y: [Xe]5s25d1 [Kr]5s24d1 [Kr]5s24d2 [Ar]4s23d104p65s25d1
The noble gas notation for chlorine (Cl) is [Ne]3s²3p⁵ and for yttrium (Y) is [Kr]5s²4d¹. This notation represents the core electrons with the symbol of the nearest preceding noble gas and the valence electron configuration thereafter.
Explanation:Noble Gas Notation for Chlorine (Cl) and Yttrium (Y)To find the electron configuration of an element in noble-gas notation, you locate the nearest noble gas that comes before the element in the periodic table. You use the noble gas to represent the core electrons and then add the remaining valence electron configuration.
For chlorine (Cl), which has 17 electrons, the nearest noble gas is neon (Ne), which has 10 electrons. Therefore, the noble-gas notation for chlorine is [Ne]3s²3p⁵.
For yttrium (Y), with 39 electrons, the nearest noble gas is krypton (Kr), which has 36 electrons. The remaining 3 electrons go into the 5s and 4d orbitals. Therefore, the noble-gas notation for yttrium is [Kr]5s²4d¹.
Give the symbol for the element that has an electron configuration of 1s22s22p63s23p4.
Answer: The symbol for the given element is S.
Explanation:-
Sulphur is an element with atomic number 16 and thus contain 16 electrons. It is a p block element as the last electron enters the p orbital. The nearest noble gas is Neon with 10 electrons.
The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration is:
[tex]S:16:1s^22s^22p^63s^23p^4[/tex]
The electronic configuration of sulphur in terms of noble gas is :
[tex]S:16:[Ne]3s^23p^4[/tex]
The element with the given electron configuration of 1s² 2s² 2p⁶ 3s² 3p⁴ is sulfur. The symbol for sulfur on the periodic table is S.
The numbers and letters in this notation have specific meanings. The numbers (1, 2, 3) represent the principal energy levels or shells, while the letters (s, p) represent the subshells or orbitals within those energy levels.
In the given element,
1s² means there are two electrons in the 1s orbital.
2s² indicates that there are two electrons in the 2s orbital.
2p⁶ signifies that there are six electrons in the 2p orbitals.
3s² shows that there are two electrons in the 3s orbital.
3p⁴ indicates that there are four electrons in the 3p orbitals.
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Write a balanced equation for the reaction of ca with hcl
What is equal solute concentration inside and outside of the cell so water moves at equal rates?
What does HYDROPHOBIC mean?
What does HYDROPHILIC mean?
Hydrophobic substances, which are 'water-fearing,' repel and don't mix with water, while hydrophilic substances are 'water-loving,' attracted to, and dissolve in water due to their polar or charged nature.
The terms hydrophobic and hydrophilic refer to the affinity, or lack thereof, that a molecule has towards water. A hydrophobic substance is one that is 'water-fearing,' meaning it repels water and does not dissolve or get wetted by it. This is often due to a lack of polar or charged groups that can form hydrogen bonds with water molecules. Common hydrophobic substances include nonpolar hydrocarbons and lipids such as fats and cholesterol.
In contrast, a hydrophilic substance is 'water-loving' and is attracted to water. Such substances can dissolve in or be wetted by water due to the presence of polar or charged groups that interact favorably with water. A hydrophile is a molecule like sugar or salt that is readily dissolved by water.
To make pickles, fresh cucumbers are soaked in a salt water solution called brine. how many liters of a 4% brine solution must be added to 16 liters of a 10% brine solution to dilute it to an 8% solution?
Final answer:
To make an 8% brine solution, 8 liters of a 4% brine solution must be added to 16 liters of a 10% brine solution.
Explanation:
To determine how many liters of a 4% brine solution must be added to 16 liters of a 10% brine solution to dilute it to an 8% solution, we can set up an equation based on the concept of concentration. Let x be the volume of the 4% solution we need to add. We know that the amount of salt in the combined solution should be equal to the sum of the salt in each solution.
The equation representing this scenario is:
(10% × 16 liters) + (4% × x liters) = 8% × (16 liters + x liters)
Converting percentages to decimals and multiplying through gives:
(0.10 × 16) + (0.04 × x) = 0.08 × (16 + x)
Expanding and grouping like terms:
1.6 + 0.04x = 1.28 + 0.08x
Subtract 0.04x from both sides and subtract 1.28 from both sides:
0.04x - 0.04x = 1.6 - 1.28
This simplifies to:
0x = 0.32
Since 0x equals zero, our equation simplifies down to 0 = 0.32, which indicates a mathematical error in our setup. Realizing this, we reassess our equation after subtracting 0.04x from both sides:
1.6 = 1.28 + 0.04x
Now we subtract 1.28 from both sides to solve for x:
0.32 = 0.04x
Divide both sides by 0.04:
x = 8 liters
Therefore, 8 liters of 4% brine solution must be added to 16 liters of 10% brine solution to achieve an 8% solution.
What is a function of water in a cell? A) producing lipids and carbohydrates B) helping the cell move and grow C) assisting in the production of proteins D) preventing rapid temperature changes
Consider a neutral atom with 30 protons and 34 neutrons. the number of electrons in this atom is ________.
The number of electrons in the given neutral atom is equal to 30.
What is a neutral atom?
A neutral atom is one in which the number of the positive charge is equal to the number of the negative charge. Therefore, the overall charge on the atom is zero. Therefore, that type of atom is called a neutral atom.
For a neutral atom, we generally say that the number of electrons is equal to the number of protons. All chemical elements arranged in the periodic table are neutral.
Given, the number of protons is equal to 30 and the number of neutrons is equal to 34. As the given atom is a neutral atom,
So, the number of electrons = Number of protons.
The number of electrons for the neutral atom = 30.
Therefore, the number of electrons in the atom is 30.
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What trend does the electronegativity have on the periodic table?
Which element has the same number of valence electrons as oxygen——. a. Neon—b. Nitrogen—c. Sulfur—d. Fluorine
Sulfur is the element that has the same number of valence electrons as oxygen, as both belong to Group 6A of the periodic table.
The element that has the same number of valence electrons as oxygen is sulfur (c). Oxygen is in Group 6A on the periodic table, which means it has six valence electrons. Sulfur, which is also in Group 6A, has the same number of valence electrons as oxygen. The completion of the valence shell is of great importance because it determines the bonding behavior and reactivity of an element. This is a part of the periodic table's systematic organization, where elements in the same group have identical valence electron configurations and exhibit similar chemical properties.
When 50.0 ml of a 0.3000 m agno3 solution is added to 50.0 ml of a solution of mgcl2, an agcl precipitate forms immediately. the precipitate is then filtered from the solution, dried, and weighed. if the recovered agcl is found to have a mass of 0.1183 g, what as the concentration of magnesium ions in the original mgcl2 solution?
Answer:
[tex]0.00826\ molar.[/tex]
Explanation:
The balanced reaction is:
[tex]2AgNO_3+MgCl_2-->2AgCl+Mg(NO_3)_2[/tex]
We know, number of moles = [tex]\dfrac{Given\ mass}{Molar\ mass}.[/tex]
Therefore, moles of AgCl formed=[tex]\dfrac{0.1183}{143}=0.000827\ moles.[/tex] ( Molar mass of AgCl is 143 gm)
From the balanced equation 1 mol of [tex]MgCl_2[/tex] forms 2 mol of AgCl.
Therefore, 0.000827 mol of AgCl was formed by
[tex]\dfrac{0.000827}{2}=0.0004135\ mol[/tex]
Now concentration of [tex]MgCl_2=\dfrac{moles\ of\ MgCl_2}{Volume\ in\ Liters}=\dfrac{0.000413}{0.050}\ molar=0.00826\ molar.[/tex]
Hence, this is the required solution.
The concentration of magnesium ions in the original MgCl₂ solution is 8.25 x 10⁻³ M, determined by using stoichiometry and principles of gravimetric analysis.
We first calculated the moles of AgCl formed and connected it back to MgCl₂. The final concentration is found by dividing the moles by the total volume.
To determine the concentration of magnesium ions (Mg²⁺) in the original MgCl₂ solution, we use stoichiometry and principles of gravimetric analysis. First, we need to find the moles of AgCl precipitated:
Mass of AgCl = 0.1183 g
Molar Mass of AgCl = 143.32 g/mol
Moles of AgCl = 0.1183 g / 143.32 g/mol = 8.25 x 10⁻⁴ mol
Since the reaction between AgNO₃ and MgCl₂ is:
2 AgNO₃ + MgCl₂ → 2 AgCl + Mg(NO₃)₂
The moles of AgCl equals the moles of Cl⁻, which also equals the moles of MgCl₂.
Initial combined volume = 50.0 mL + 50.0 mL = 100.0 mL
So, the concentration of Mg²⁺ is:
[Mg²⁺] = (moles of MgCl₂) / (total volume in L)
= (8.25 x 10⁻⁴ mol) / (0.100 L)
= 8.25 x 10⁻³ M
Thus, the concentration of magnesium ions in the original MgCl₂ solution is 8.25 x 10⁻³ M.
If an insufficient amount of liquid unknown had been used, how would this have effected the value of the experimental molar mass
Using an insufficient amount of a substance in an experiment can lead to incorrect calculation of its molar mass, as the measurement is dependent on the amount of the substance used. This is evident in experiments involving volatile liquids, where insufficient amounts could result in fewer gas molecules. This inaccuracy also affects percent composition and the calculation of molecular and empirical formulas.
Explanation:If an insufficient amount of liquid unknown had been used in an experiment, it would have effected the experimental molar mass as molar mass is calculated based on the mass of the substance used. Reducing the amount of the substance used can lead to inaccurate measurements, potentially giving the compound a higher or lower molar mass than it actually has.
For example, if we were measuring a volatile liquid, the molar mass would be determined by heating the liquid in a flask with a tiny hole at the top, thereby converting the liquid into gas. In this case, the molar mass is calculated based on measurements of the mass, pressure, volume, and temperature of the sample. If the amount of liquid used was less than required, it could result in fewer gas molecules being formed, thereby affecting the molar mass calculated.
Furthermore, when looking at percent composition which is derived from the atomic or molar masses of the compound's elements, an insufficient amount of the liquid would also alter these figures, again leading to inconsistencies and inaccuracies in the calculation of the molecular and empirical formulas as well as the molar mass.
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We know that a neutral atom of bromine (Br) is larger than a neutral atom of magnesium (Mg) because
A.) group numbers tells us how many electrons orbitals surround a nucleus, bromine is in group 7A while magnesium is in group 2A
B.)period numbers tells us how many electron orbitals surround a nucleus, bromine is in period 4 while magnesium is in period 3
C.)atoms with many electrons are always larger than atoms with fewer electrons, a neutral atom of bromine has 35 electrons while neutral atom of magnesium has only 12.
D.) bromine and magnesium has very different physical and chemical properties.
Answer: Option (C) is the correct answer.
Explanation:
Bromine is a group 7A element with atomic number 35. Whereas magnesium is a group 2A element with atomic number 12.
This means that a neutral atom of bromine has more number of electrons as compared to a neutral atom of magnesium. Hence, size of a bromine atom will definitely be larger than the size of a magnesium atom.
Thus, we can conclude that we know that a neutral atom of bromine (Br) is larger than a neutral atom of magnesium (Mg) because atoms with many electrons are always larger than atoms with fewer electrons, a neutral atom of bromine has 35 electrons while neutral atom of magnesium has only 12.