Answer:
3.0 mol.
Explanation:
Molaity (m) is defined as the no. of moles of solute per kg of solvent.
m = (no. of moles of solute Ca(NO₃)₂)/(kg of solvent).
∴ no. of moles of solute Ca(NO₃)₂ = (m)(kg of solvent) = (3.0 m)(1.0 kg) = 3.0 mol.
What makes a molecule polar?
Answer:
Polar covalent bonds within the molecule that are not symmetric
Explanation:
(APEX)
Hope you got this in time
Answer:
polar covalents bonds within the molecule that are not symmetrical
Explanation:
If a 3 kg moon rock is moved from the moon to the earth does the mass of the rock change
Answer:
No, only the wiehgt, because the gravitational pull on the two, are diffrent. 3kg on the moon may be 6kg here on earth. but in the end, the rock still holds however much rock it held in the begining.
Explanation:
Final answer:
The mass of a moon rock remains unchanged when moved from the moon to Earth. However, its weight would increase due to the stronger gravitational pull of the Earth.
Explanation:
When a 3 kg moon rock is moved from the moon to the earth, the mass of the rock does not change. Mass is a measure of the amount of matter in an object and is constant regardless of location. However, the weight of the rock, which depends on the gravitational pull it experiences, will change. On the Moon, where the acceleration due to gravity is only 1.67 m/s², the rock would weigh less than it does on Earth, where the acceleration due to gravity is 9.80 m/s². Thus, while the mass remains unchanged, the weight of the moon rock increases when it is moved to Earth because it is in a region with stronger gravity.
Energy is needed to break bonds in chemical reactions
Answer:
This is True
Explanation:
When a chemical reaction occurs, molecular bonds are broken and other bonds are formed to make different molecules. For example, the bonds of two water molecules are broken to form hydrogen and oxygen. Energy is always required to break a bond, which is known as bond energy.
Final answer:
The true statement reflects the fact that energy, specifically bond energy, is needed to break chemical bonds during reactions. This is an essential concept in chemical reactions, as bonds must be broken before new ones can be formed, resulting in changes in energy.
Explanation:
The statement Energy is needed to break bonds in chemical reactions is true. In any chemical reaction, bonds between atoms must be broken so that new bonds can form, and this process requires an initial input of energy. This energy is known as the bond energy, which varies depending on the chemical bond but is specific to each type of bond. When a bond is broken, the stored potential energy within the bond is transformed into other forms, such as kinetic energy, which might manifest as heat.
Furthermore, while it costs energy to break bonds, energy is also released when new bonds are made during the reaction. The overall energy change in a chemical reaction depends on the balance between the energies required to break bonds in the reactants and the energies released when new bonds form in the products. It's critical to understand that the same amount of energy required to break a bond is released when that bond is formed.
In summary, all chemical reactions involve changes in energy, whether absorbing it to break old bonds or releasing it when new bonds form. The concept of bond energy is crucial for explaining the dynamics of chemical reactions and the stability of molecules.
what is the shape of ICl4-?
Answer:
the ICl4− ion forms a molecular structure that is square planar, an octahedron with two opposite vertices missing.
The shape of ICl₄⁻ is square planar due to the arrangement of six regions of electron density around the central iodine atom.
The molecular shape of ICl₄⁻ is square planar. This ion includes six regions of electron density around the central iodine atom: four bonding pairs with chlorine atoms and two lone pairs of electrons.
These six regions of electron density adopt an octahedral arrangement to minimize repulsions, with the lone pairs occupying opposite positions. As a result, the four bonded chlorine atoms are arranged in a square planar geometry.The central iodine atom has six electron groups around it (four bonding pairs and two lone pairs).These groups arrange themselves in an octahedral geometry to minimize electron repulsion.The lone pairs occupy two opposite positions, leading to a square planar shape for the bonded chlorine atoms.How does phloem tissue relate to the process of cellular respiration inside plants?
During cellular respiration, plants break down the stored food in the mitochondria. Vascular plants have special tissues called xylem and phloem that transport water and minerals to leaves, and food from the leaves to all areas of the plant.
Hope this helps :D
Final answer:
Phloem tissue transports food produced in photosynthesis to other parts of the plant for growth and storage.
Explanation:
Phloem tissue is responsible for the translocation of soluble organic substances, such as sugar, throughout the plant. The substances travel along sieve elements, which are living cells separated by end walls with small pores called sieve plates. Phloem transports food produced in photosynthesis to other parts of the plant for growth and storage, including the roots which in turn ensures healthy growth of plants and their various parts.
Therefore, Phloem tissue transports food produced in photosynthesis to other parts of the plant for growth and storage.
Some one help me plzz
Answer:
The amount of energy lessens
Explanation:
The producer will always have the most energy as it comes directly from the sun and the energy is passed onto each organism as they eat one another. The higher you are the least amount of energy you have! Hope that helps!
What volume of 0.2500 M NaOH is required to neutralize 10.00 mL of 0.4000 M H2SO4
Answer:
volume is 32.00 mL
Explanation:
the balanced equation for the neutralisation reaction is as follows
2NaOH + H₂SO₄ ---> Na₂SO₄ + 2H₂O
molar ratio of NaOH to H₂SO₄ is 2:1
number of H₂SO₄ moles reacted - 0.4000 mol/L x 10.00 x 10⁻³ L = 0.00400 mol
according to the molar ratio
number of NaOH moles reacted - 2 x number of H₂SO₄ moles reacted
number of NaOH moles reacted - 2 x 0.004000 mol = 0.008000 mol
concentration of NaOH is - 0.2500 mol/L
concentration = number of moles of solute / volume
rearrange the equation
volume = number of moles / concentration
volume = 0.008000 mol / 0.2500 mol/L
volume = 0.03200 L
therefore volume is 32.00 mL
To neutralize 10.00 mL of 0.4000 M H2SO4, you will need 32.00 mL of 0.2500 M NaOH.
Explanation:To determine the volume of 0.2500 M NaOH required to neutralize 10.00 mL of 0.4000 M H2SO4, we can use the concept of stoichiometry and the balanced chemical equation for the neutralization reaction:
H2SO4 + 2NaOH → Na2SO4 + 2H2O
From the equation, we can see that 1 mole of H2SO4 reacts with 2 moles of NaOH.
First, we calculate the moles of H2SO4 in the given solution: 0.4000 M * 0.01000 L = 0.004000 mol.
Since the mole ratio of H2SO4 to NaOH is 1:2, we need twice the moles of NaOH to neutralize the H2SO4. Thus, the required moles of NaOH is 2 * 0.004000 mol = 0.008000 mol.
Next, we can use the molarity and the moles of NaOH to calculate the volume of NaOH:
The volume of NaOH = Moles of NaOH / Molarity of NaOH = 0.008000 mol / 0.2500 M = 0.03200 L = 32.00 mL.
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Consider the unbalanced chemical equation HBr + Al AlBrs + H2. When
coefficients are added to balance the equation, which two substances will
have a coefficient of 2?
If we balance the reaction.Then it seems like
6HBr + 2Al > 2AlBr3 +3H2
where, Al and AlBr3 has their coefficient of 2.
Answer:
[tex]\boxed{\text{Al and AlBr$_{3}$}}[/tex]
Explanation:
Step 1. Pick the most complicated-looking formula (AlBr₃).
Put a 1 in front of it.
HBr + Al ⟶ 1AlBr₃ + H₂
Step 2: Balance Al.
We have fixed 1 Al on the right. We need 1 Al on the left.
Put a 1 in front of Al.
HBr + 1Al ⟶ 1AlBr₃ + H₂
Step 3. Balance Br.
We have fixed 3Br on the right. We need 3Br on the left.
Put a 3 in front of HBr.
3HBr + 1Al ⟶ 1AlBr₃ + H₂
Step 4. Balance H.
We have fixed 3 H on the left. We need 3 H on the right.
We need one more H (½ H₂) on the right.
3HBr + 1Al ⟶ 1AlBr₃ + ³/₂H₂
Oops. Fractional coefficients! We must multiply all coefficients by a number to give integer coefficients.
Step 5. Get rid of fractions.
Multiply all coefficients by2.
6HBr + 2Al ⟶ 2AlBr₃ + 3H₂
All species have a coefficient. The equation is now balanced.
[tex]\text{The two substances with a coefficient of 2 are }\boxed{\textbf{Al and AlBr$_{3}$}}[/tex]
Given the following heats of combustion: C2H2(g) = -1300 kJ/mole, H2(g) = -286 kJ/mole, C2H6(g) = -1560 kJ/mole, Calculate the enthalpy change for the following reaction
C2H2(g) + 2H2(g) → C2H6(g)
a. -312 kJ
b. -26 kJ
c. +312 kJ
d. -26 kJ
Answer is A.
First plug in the designated enthalphy values for eachThen solve for the equation as you would an algebra problemPLEASE HELP ASAP
it's Actually science sorry
Which type of disease is caused by genetic or lifestyle factors?
a(n)______ disease
Which type of disease is caused by pathogens?
a(n)______ disease
Answer:
a infectious and a noninfectious disease
Explanation:
Answer:
what gigi said but other way around
Explanation:
What is the temperature in C of a sample of 4.75 moles of CO2 gas at a pressure of 0.998 atm that is placed in a container with a volume of .125 L?
Answer:
[tex]\boxed{\text{-272.83 }^{\circ}\text{C}}[/tex]
Explanation:
We can use the Ideal Gas Law to calculate the temperature.
pV = nRT
[tex]T = \dfrac{pV}{nR}[/tex]
Data:
p = 0.998 atm
V = 0.125 L
n = 4.75 mol
R = 0.082 06 L·atm·K⁻¹mol⁻¹
Calculation:
[tex]T = \dfrac{0.998 \times 0.125}{4.75 \times 0.082 06} =\text{0.320 K}[/tex]
T = (0.320 – 273.15) °C = -272.83 °C
Note: This is an impossible situation. CO₂ solidifies at -78.5 °C.
If CO₂ were an ideal gas, the calculated temperature would be [tex]\boxed{\text{-272.83 }^{\circ}\text{C}}.[/tex]
Describe each of the following models of the atom: the plum pudding model, Bohr's model, and the wave mechanical model.
Answer:
pulm pudding: Model of the atom proposed by J.J Thomson as a result of his work with cathode ray tubes. In it, the neutral atom contains negatively charged particles (electrons) scattered throughout a lump of positive charge like raisins in plum pudding.
The 'plum pudding' model describes an atom as a large positively charged pudding with negative electrons dotted around it. The Bohr model illustrates the atom with a central nucleus and electrons in fixed orbits. The wave mechanical model uses quantum mechanics to depict an electron cloud around the nucleus.
Explanation:The plum pudding model of the atom was proposed by J.J. Thomson in 1897. This model suggests that the atom is a 'pudding' of positive charge with 'plums' of negative charge ( electrons) scattered throughout.
Next, the Bohr's model asserted by Niels Bohr in 1913, depicts the atom as a small, positively charged nucleus surrounded by electrons that travel in circular orbits around the nucleus. Each orbit corresponds to a specific energy level.
Lastly, the wave mechanical model, also known as the quantum mechanical model, was developed throughout the 1920s. This model implies that it is impossible to determine precisely both the position and momentum of an electron at the same time. Therefore, electron location is represented as an electron cloud around the nucleus, where the density of the cloud indicates the probability of finding the electron in that location.
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How would you calculate the atomic mass of an atom of silver (Ag)?
Answer:
107.8682 u
Explanation:
Well Silver has an atomic mass of aproximately 107.9. 1 mole of silver atoms = 107.9g and there are 6.02x10^23 atoms in one mole. Therefore to find mass of one atom you should divide the mass by Avodgadro's constant to find the mass of one atom because they all have an even distribution of mass.
The average atomic mass of the element takes the variations of the number of neutrons into account, and tells you the average mass per atom in a typical sample of that element. For example, the element silver (Ag) has two naturally occurring isotopes: Ag-107 and Ag-109 (or 107Ag and 109Ag).
Answer: to determine the atomic mass of silver, or any other element , add the number of protons and the number of neutrons together.
Explanation:
Which of the following processes has directly caused ocean currents to change over Earth's history? A. Ice-albedo feedback B. Continental drift C. Axial precession D. Volcanic activity
Answer:continental drift
Explanation:
Answer:
Option (B)
Explanation:
The continental drift is defined as the shifting of the continents over the large water body with respect to the poles. These continents moved from one place to another across the line of different latitudes and longitudes, experiencing various types of climatic conditions, due to which the ocean water currents has been significantly affected. This presence and continuous motion of continents affects the direction of the ocean currents that moves from the equatorial to the polar region.
Thus, over the earth's geological history, the ocean currents are undergoing changes due to the continental drifting.
Hence, the correct answer is option (B).
Sodium is a dull-coloured metal. It is very reactive and must be stored in oil for safety.
Chlorine is a pale green, toxic gas. Small amounts are used to disinfect swimming pools.
A reaction between sodium and chlorine produces a white, crystalline solid, which is commonly known as table salt.
Q: Explain why it is difficult to get chlorine out of sodium chloride.
Answer:
Hi there!
It is difficult to remove chlorine out of sodium chloride because in order to separate them you must put that energy into the salt.
Chlorine gas is toxic, and extremely irritating to the eyes and mucous membranes.
Some physical evidence was obtained from a crime scene. For which of these pieces of evidence will forensic scientists conduct an identification test?
A.
a hair strand
B.
a black powder
C.
a glove
D.
bloodstains
Answer:
B. a black powder
Explanation:
Just got it right on the test Edmentum/PLATO
Final answer:
Forensic scientists perform identification tests on all evidence; DNA analysis is conducted on D. bloodstains and A. hair strands, while other materials like black powder and gloves are tested for chemical composition or trace evidence.
Explanation:
Forensic scientists conduct an identification test on all pieces of physical evidence obtained from a crime scene to determine their origin or match them to a suspect. In the context of the options provided (a hair strand, a black powder, a glove, and bloodstains), forensic scientists would likely perform DNA extraction and analysis on the bloodstains and possibly on the hair strand if the root is intact, as these biological samples contain DNA that can be used to identify a person.
The forensic team would also test the black powder for any chemicals or substances to understand its composition, and examine the glove for DNA, fingerprints, or other trace evidence that might associate it with a suspect or the crime scene.
Which factor is defined as the average kinetic energy of a substance?
A.the mass of the substance
B. the volume of the substance
C.the pressure of the substance
D.the temperature of the substance
Answer:
The temperature.
Explanation:
Temperature and kinetic energy are equally proportional.
D. Temperature is the factor based upon which the average kinetic energy of the substance depends upon.
Explanation:The kinetic theory of gases depicts a gas as countless submicroscopic particles, which are all in steady, fast, arbitrary movement. The haphazardness emerges from the particles' numerous crashes with one another and with the dividers of the holder.
This theory of gases clarifies the perceptible properties of gases, for example, weight, temperature, thickness, warm conductivity, and volume, by thinking about their atomic synthesis and movement. The hypothesis places that gas weight results from particles' crashes with the dividers of a compartment at various speeds.
What type of bond forms between carbon and oxygen
Carbon–oxygen bond. A carbon–oxygen bond is a polar covalent bond between carbon and oxygen. Oxygen has 6 valence electrons and prefers to either share two electrons in bonding with carbon, leaving the 4 nonbonding electrons in 2 lone pairs :O: or to share two pairs of electrons to form the carbonyl functional group.
The type of bond that forms between carbon and oxygen is a covalent bond.
Covalent bonding involves the sharing of electrons between atoms. In the case of carbon and oxygen, both atoms can achieve a more stable electron configuration by sharing electrons.
Carbon has four valence electrons, and oxygen has six valence electrons. When carbon and oxygen atoms come together, they can share two electrons to form a double bond.
In this arrangement, carbon shares two electrons with oxygen, and oxygen shares two electrons with carbon. This sharing of electrons allows both atoms to achieve a full outer electron shell, satisfying the octet rule.
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What was one idea Dalton taught about atoms
According to Dalton's atomic theory :
All matter is made up of atoms which are indivisible and indestructible. Atoms of the same element have the same property and same mass. Compounds are made up of atoms of different elements. Atoms are rearranged in a chemical reaction.One idea that Dalton taught about atoms is that they are indivisible and indestructible particles.
John Dalton, an English scientist, proposed his atomic theory in the early 19th century. One of the key ideas in Dalton's theory was that atoms are indivisible and indestructible particles. According to Dalton, atoms are the fundamental building blocks of matter, and they cannot be divided into smaller parts or destroyed in chemical reactions.
Dalton based his idea on experimental evidence and observations. He performed numerous chemical experiments and analyzed the results to develop his atomic theory. One of the crucial observations that supported his theory was the law of conservation of mass, which states that in a chemical reaction, matter is neither created nor destroyed. This led Dalton to conclude that atoms, as the fundamental units of matter, must remain intact during chemical reactions.
Dalton's idea of indivisible and indestructible atoms laid the foundation for our modern understanding of atomic structure. However, with advancements in scientific knowledge and the discovery of subatomic particles, we now know that atoms are composed of even smaller particles, such as protons, neutrons, and electrons. Nevertheless, Dalton's concept of atoms as fundamental units of matter that retain their identity in chemical reactions remains a significant contribution to the field of atomic theory.
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How many moles of ZnCl2 will be produced from 23.0g of Zn, assuming CuCl2 is available in excess?
23.0g of Zn is equivalent to 0.35 moles. Given that CuCl2 is in excess, the reaction will result in an equal number of moles of ZnCl2, i.e., 0.35 moles.
Explanation:This is a question about the stoichiometry of the reaction between zinc (Zn) and copper chloride (CuCl2). We are given 23.0g of Zn and asked how many moles of zinc chloride (ZnCl2) will be produced, assuming that copper chloride is present in excess.
The relevant reaction from the examples given is:
Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g)
First, we need to calculate the moles of Zn. We do this using the molar mass of Zn, which is approximately 65.38 g/mol.
moles of Zn = 23.0 g / 65.38 g/mol = 0.35 mol
Because CuCl2 is in excess and the reaction stoichiometry is 1:1, we can assume all the zinc will react to form ZnCl2. Therefore, 0.35 moles of Zn will produce 0.35 moles of ZnCl2.
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0.351 moles of ZnCl2 will be produced from 23.0g of Zn with CuCl2 available in excess.
Explanation:In order to determine the number of moles of ZnCl2 produced, we need to use the stoichiometry of the reaction. Based on the balanced equation: CuCl2 (aq) + Zn (s) → ZnCl2 (aq) + Cu (s)
We can see that the mole ratio between ZnCl2 and Zn is 1:1. Therefore, the number of moles of ZnCl2 produced will be the same as the number of moles of Zn used.
Since we have 23.0g of Zn, we can convert this mass into moles using the molar mass of Zn:
23.0g Zn x (1 mol Zn / 65.38g Zn) = 0.351 mol Zn
Therefore, 0.351 moles of ZnCl2 will be produced from 23.0g of Zn with CuCl2 available in excess.
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With the kinetic energy of a sample increases the____ will also increase
Answer:
Its Temperature.
Explanation:
Kinetic energy is the energy possessed by a body while in motion. Potential energy on the other hand is the energy possessed by a body based on its position.Kinetic energy of a body is determined by the equation; K.E = 3RT/2; From the equation, kinetic energy is directly proportional to the temperature of the system and therefore an increase in the kinetic energy of a sample causes an increase in temperature of the system.Select the correct answer.
An atom of nitrogen has seven electrons. Which diagram correctly represents the arrangement of these electrons?
Answers are in the photo attached...
Answer:
C.
Explanation:
The electronic configuration of N (7 electrons): 1s² 2s² 2p³.
The orbital 1s is filled with two electrons and their spinning direction is opposite and also electrons of 2s.
3p contains (3 electrons) should fill the 3 orbitals firstly. Every orbital contains 1 electron and be in the same spin direction.
So, the right choice is c.
A is wrong because 2 electrons of 3p are paired in the first orbital before filling every orbital.
B is wrong because the 2 electrons of 1s and 2s are in the same direction and also 2 electrons of 3p are paired in the first orbital before filling every orbital.
D is also wrong the 2 electrons of 1s and 2s are in the same direction and the electron in the second orbital of 3p are in opposite direction of the other 2 electrons.
NEED ANSWER BEFORE 2:00
what is meant by the rate of a chemical reaction
Hello!
Reaction rate, the speed at which a chemical reaction proceeds.
Oh yes another person answered the same thing before me. Sorry if I was inconvenient.
Hope you pass or understand everything, though! Good luck!
~ Destiny ^_^
Final answer:
The rate of a chemical reaction refers to how fast the reaction proceeds. It is determined by the change in concentration of a reactant or product with time.
Explanation:
The rate of a chemical reaction refers to how fast the reaction proceeds. It can be expressed as the change in concentration of a reactant or product with time. For example, if a 1.00 M aqueous solution of substance A is converted to substance B, the reaction rate can be measured by tracking the decrease in the concentration of A or the increase in the concentration of B over a specific time interval.
Shana solves stoichiometry problems using the equation for the synthesis of water. Which interpretation of the balanced equation would cause Shana to make a mistake? Two moles of hydrogen react with one mole of oxygen to form two moles of water. Two grams of hydrogen react with one gram of oxygen to form two grams of water. Two molecules of hydrogen react with one molecule of oxygen to form two molecules of water. Two liters of hydrogen react with one liter of oxygen to form two liters of water.
Answer: Two grams of hydrogen react with one gram of oxygen to form two grams of water.
Answer : The wrong statement is, Two grams of hydrogen react with one gram of oxygen to form two grams of water.
Explanation :
Synthesis reaction : It is a type of reaction in which the reactants present in elemental state that reacts to give a single product.
It is represented as,
[tex]X+Y\rightarrow XY[/tex]
where, X and Y are the reactants and XY is the product.
The balanced synthesis reaction of water will be,
[tex]2H_2+O_2\rightarrow 2H_2O[/tex]
By the stoichiometry we can say that, 2 moles of hydrogen [tex](H_2)[/tex] react with 1 mole of oxygen [tex](O_2)[/tex] to form 2 moles of water [tex](H_2O)[/tex] as a single product.
Or we can say that,
2 molecules of hydrogen react with 1 molecule of oxygen to form 2 molecules of water.
Or,
2 liters of hydrogen react with 1 liter of oxygen to form 2 liters of water.
These three statements are correct.
But the statement, 2 grams of hydrogen react with 1 gram of oxygen to form 2 grams of water are incorrect statement.
Hence, the wrong statement is, Two grams of hydrogen react with one gram of oxygen to form two grams of water.
All scientific ideas are tentative and subject to change and improvement in principle.
True
False
Answer:
true
Explanation:
It will be True. :)
Carbon Dioxide in a 34 L container at a pressure of 387 mm Hg is transferred to a container with a pressure of 274 mm Hg. What is the new volume if the temperature changes from 211 K to 350 K?
Answer:
V2= 0.0796m3
Explanation:
We have that for a real gas the following relation is fulfilled:
PV / T = constant
To use this formula I need to pass the pressure of mmHg to KPa and the volume of L to m3, knowing that
1Kpa = 7.50062mmHg
1L = 0.001m3
So i can say
P1V1/T1 =P2V2/T2
So
V2= P1V1T2/P2T1
V2= 51.60KPa*0.034m3*350k/36.53KPa*211k
finally
V2= 0.0796m3
which of the following is not one of the three common forms of matter
Answer:
Plasma.
Explanation:
The three common forms of matter are liquids, solids, and gases.
A student boils 9.43 grams of an unknown substance into vapor. If completely vaporizing the substance required 8,720 joules of energy, what is the heat of vaporization? The heat of vaporization is joules/gram.
Heat of vapourrisation required to( change the state) of water is 2260 J/grm.
Answer : The heat of vaporization is, 924.7 joules/gram.
Explanation :
Formula used for heat of vaporization :
[tex]H_{Vap}=\frac{q}{m}[/tex]
where,
[tex]H_{Vap}[/tex] = heat of vaporization = ?
q = required heat = 8720 J
m = mass of substance = 9.43 g
Now put all the given values in the above formula, we get :
[tex]H_{Vap}=\frac{8720J}{9.43g}=924.7J/g[/tex]
Therefore, the heat of vaporization is, 924.7 joules/gram.
the periodic table is organixed so that atoms of elements with the same number of valence electrons are in
a. diagonals
b. cells.
c. period (row)
d. groups (columns)
Answer:
Columns
Explanation:
Diagonals are a of no importance in the Periodic Table
cells are non applicable,
rows organize the number of orbitals in an atom
Answer: The correct answer is Option d.
Explanation:
Elements in a periodic table are distributed in 7 Periods and 18 Groups. The elements are distributed on the basis of increasing atomic numbers.
Periods are known as horizontal rows and groups are known as vertical columns.
In a period, the number of shells around the nucleus remains the same but the valence electrons keep on increasing as we move from left to right.
For Example: In Period 2, the number of valence shells increases from 1 (for lithium) to 8 (for neon)
In a group, the number of shells around the nucleus keeps on increasing but the valence electrons remains the same as we move from top to bottom.
For Example: For Group 1, the number of valence electrons are 1
Hence, the correct answer is Option d.
What’s the percent by mass of 3.55g NaCL in 91.55g of solution
Answer:
3.88%
Explanation:
Given parameters:
Grams of solute = 3.55g of NaCl
Grams of solution = 91.55g of solution
Mass percentage
of NaCl(%) = grams of solute/grams of solution x 100
Mass percent = 3.55/91.55 x 100
Mass percent = 3.88%