Newton's first law of inertia says that an object at rest will stay at rest and an object in motion will stay in motion unless acted on by a force; thus the statement is True
What is the law of inertia?The law of inertia is also known as Newton's first law of motion.
The law of inertia states that a body at rest or that is moving at constant or uniform motion along a straight line will remain in its state of rest or motion or uniform motion along a straight line unless acted upon by an external force.
The law of inertia explains why it s difficult to start an object moving or to stop a moving object.
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In a titration, 20 mL of 0.27 M NH3 was titrated with 0.20 M HCl. Calculate the pH of the resulting solution after the addition 0 mL of the acid? (give your answer to two decimal places) (Kb ammonia = 1.8 x 10-5)
The pH of 20 mL of 0.27 M NH₃ (ammonia) solution after 0 mL of acid is 11.34.
What is the pH of the solution ammonia solution after 0 mL of acid has been added?The pH of 20 mL of 0.27 M NH₃ (ammonia) solution after 0 mL of acid has been added is equal to the pH of the solution when no acid has been added.
The pH of the NH₃ solution is calculated from the dissociation equation and the formula below:
Dissociation equation: NH₃ + H₂O ⇄ NH₄⁺ + OH⁻
Kb = [NH₄⁺] * [OH⁻] / [NH₃]
Kb of NH₃= 1.8 * 10⁻⁵
From the equation of dissociation above, [NH₄⁺] = [OH⁻] = x
Kb = x²/ [NH₃]
x² = Kb * [NH₃]
x = √( Kb * [NH₃])
x = √(1.8 * 10⁻⁵ * 0.27)
x = 0.0022 M
[OH⁻] = 0.0022
pOH = - log [OH⁻]
pOH = -log (0.0022)
pOH = 2.66
pH = 14 - 2.66
pH = 11.34
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Select the best answer for the question.
10. What's the structure of PF,? Is it polar or non-polar?
O A. Trigonal bipyramidal, non-polar
OB. Square pyramid, polar
O C. Square pyramid, non-polar
O D. Trigonal bipyramidal, polar
Calculate the [OH−] and the pH of a solution with an [H+]=4.9×10−13 M at 25 °C .
[OH−]= M
pH=
Calculate the [H+] and the pH of a solution with an [OH−]=2.2×10−7 M at 25 °C .
[H+]= M
pH=
Calculate the [H+] and the [OH−] of a solution with a pH=8.66 at 25 °C .
[H+]= M
[OH−]= M
The [OH⁻] concentration is 1.9 × 10⁻² M and the [H⁺] concentration is 3.9 × 10⁻⁸ M
a) [ H⁺ ] = 4.9 × 10⁻¹³ M
pH = - log [ 4.9 × 10⁻¹³ ]
pH = 12.3
pH + pOH = 14
pOH = 14 - 12.3 = 1.7
pOH = -log [OH⁻]
[OH⁻] = 10^-1.7
= 1.9 × 10⁻² M
b) pOH = - log [ 2.2 × 10⁻⁷]
pOH = 6.6
pOH + pH = 14
pH = 7.4
pH = -log [H⁺]
[H⁺] = 10^-7.4
[H⁺] = 3.9 × 10⁻⁸ M
Thus, The [OH⁻] concentration is 1.9 × 10⁻² M and the [H⁺] concentration is 3.9 × 10⁻⁸ M
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Compare the properties of solids, liquids, and gases in terms of the kinetic molecular theory.
Given the equation 4Al+3O2=2Al2O3 How many moles of oxygen are needed to react with 100 grams of aluminum
Taking into account the reaction stoichiometry, 2.778 moles of oxygen are needed to react with 100 grams of aluminum.
Reaction stoichiometryIn first place, the balanced reaction is:
4 Al + 3 O₂ → 2 Al₂O₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al: 4 molesO₂: 3 molesAl₂O₃: 2 molesThe molar mass of the compounds is:
Al: 27 g/moleO₂: 32 g/moleAl₂O₃: 102 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al: 4 moles ×27 g/mole= 108 gramsO₂: 3 moles ×32 g/mole= 96 gramsAl₂O₃: 2 moles ×102 g/mole= 204 gramsMoles of O₂ requiredThe following rule of three can be applied: If by reaction stoichiometry 108 grams of Al react with 3 moles of O₂, 100 grams of Al react with how many moles of O₂?
moles of O₂= (100 grams of Al× 3 moles of O₂)÷ 108 grams of Al
moles of O₂= 2.778 moles
Finally, 2.778 moles of oxygen are needed.
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A piece of an unknown metal with mass 23.8g is heated to 100.0 degrees Celsius and dropped into 50.0
cm³ of water at 24.0 degrees Celsius. The final temperature of the system is 32.5 degrees Celsius. What is the specific heat of the metal?
The specific heat of the metal is 1.1106 J/g°C
Specific heat is the quantity of heat required to raise the temperature of one gram of a substance by one celsius degree
Here given data is
Mass of unknown metal = 23.8g
Temprature = 100°C
Mass of water = 50.0cm³ = 50 g
Temprature of water = 24.0°C
Final temprature of the system = 32.5°C
We have to find specific heat = ?
So first we determine the heat gain by water
Specific heat of water is 4.18 J/g°C
Q = mcΔT
Q = 50 g×8.5°C×4.18 J/g°C
Q = 1776.5 Joules
Then we determine the total heat lost by the unknown metal
Taking the specific heat f the metal to be x
Heat = 23.8g×67.5°C×x
1776.5 Joules = 23.8g×67.5°C×x
1776.5 Joules = 1606.5 J
x = 1606.5 J/1776.5 Joule
x = 1.1106 J/g°C
Specific heat of the metal is 1.1106 J/g°C
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What mass of carbon dioxide is produced from the complete combustion of 6.70x10-3 g of
methane?
The full burning of 6.70x10-3 g of methane results in the production of 2.95872 mass of carbon dioxide.
Combustion is what kind of reaction?Burning is sometimes referred to as combustion. A fuel is heated and interacts with oxygen in a combustion reaction. The three elements of fuel, heat, and oxygen required for combustion are summarized by the fire triangle.
What is the purpose of combustion?Chemical processes that occur during combustion are frequently quite exothermic. The energy of chemical molecules generated during this reactive process is used by combustion systems to power vehicles, produce electricity, or heat a variety of uses.
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please help me with it
Explanation:
I can't see the questions!!
Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy photon.
Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy photon.
n = 7 → n = 4
n = 3 → n = 5
n = 3 → n = 2
n = 6 → n = 3
The highest energy transition in the hydrogen atom among the following is from n=6 to n=3. Hence option d is correct.
What is Bohr model?Bohr model of atom proposed the modern atomic model based on the interpretations from quantum mechanics. According to this model, electrons are revolving around the atom through circular paths of fixed energy.
The energy of the se levels and the momentum of electrons can be determined using Bohr's equation. Electrons can transit between these energy levels. The Rydberg formula for the transition is written as follows:
[tex]\frac{1}{\lambda} = R [\frac{1}{n_{1}^2} -\frac{1}{n_{2}^2} ][/tex]
Here, R is the Rydberg constant and n1 and n2 be the first and second energy levels.
The transition n=6 to n=3 gives the higher value for this equation. Hence, this transition results highest energy absorption.
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15. A 100 g sample of each of the following metals is heated from 35°C to 45°C. Which metal absorbs
the greatest amount of heat energy?
Metal
4
magnesium
e. copper
copper
magnesium
mercury
silver
lead
b. lead
c. silver
Specific Heat Capacity
0.385 J/(g-°C)
1.02 J/(g-°C)
0.138 J/g °C)
0.237 J/(g-°C)
0.129 J/(g-°C)
d. mercury
Answer:
b
Explanation:
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4. When a beaker of water is heated its volume increases a little. What is happening to
the particles in the liquid?
a. speed up and move closer
b. slow down and move closer
c. speed down and move farther apart
d. slow down and move farther apart
Answer: They speed up and move farther apart.
Explanation: With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates. The volume increases as they start moving apart from each other.
Sodium combines with water to produce sodium hydroxide and hydrogen gas.
Which word equation represents this
violent reaction?
O sodium hydroxide + water _, sodium + hydrogen
O sodium + water + - sodium hydroxide + hydrogen
O sodium + hydrogen - sodium hydroxide + water
• sodium + sodium hydroxide - water + hydrogen
sodium + water + - sodium hydroxide + hydrogen is the word equation to produce sodium hydroxide and hydrogen gas.
Option B is correct.
Is the chemical change that occurs when water and sodium combine to generate sodium hydroxide and hydrogen gas?A colorless solution of sodium hydroxide (NaOH) and hydrogen gas is created when sodium metal interacts quickly with water (H2).It is an exothermic process.
What happens chemically when water and sodium hydroxide are combined?Na+ and OH- ions result from the reaction NaOH and H2O. Heat will be released because the process is exothermic. Since sodium hydroxide is regarded as a strong base, it can completely and entirely dissociate in aqueous solution.
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Answer: calcium
Explanation:
6. Paula does 8000 J of work pushing a wheelbarrow to her garden. If the distance she
moved the wheelbarrow is 25 m, what force did she use to move the wheelbarrow?
A. 80 N
B. 320 N
C. 8000 N
D. 200 000 N
The amount of force will be 320 N.
Force can be defined as the ratio of work and distance. The unit of the force will be Newton. It can be represented by N. There are various type of force and they are tension force and frictional force.
The given data:
W = 8000J
d = 25m
The relation between the force, distance and work can be expressed as:
W = f×d....(i)
Put the given data in equation (i).
8000 J = f × 25m
f = 8000/25
f = 320 N
Therefore, the force will be 320 N.
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What is the atomic radius of Br?
84pm
140pm
60pm
117pm
Answer:
The answer is 117.
Explanation:
There’s not really a way to calculate atomic radius. It comes from empirical data and is in the periodic table. The only way I can think of is Bohr’s radius constant.
₀ = 4₀(ℎ bar)²/_e (_e)²
Calculating atomic radius can get complicated so it’s best to leave it at this.
how much will the temperature of 5.00g of silver decrease if it loses 982 j of heat ?
The temperature of the silver will decrease by -828.7 °C
if it loses 982 J of heat energy
How do I determine the temperature change?From calorimetry, we understood that heat released or lost is given by:
Q = MCΔT
Where
Q is heatM is the mass C is the specific heat capacityΔT is the temperature change
With the above formula, we can determine the temperature change of the silver. This is illustrated below
Mass of silver (M) = 5.00 gHeat lost (Q) = -982 JSpecific heat capacity of silver (C) = 0.237 J/gºC Temperature change (ΔT) = 124Q = MCΔT
-982 = 5 × 0.237 × ΔT
-982 = 1.185 × ΔT
Divide both side by 1.185
ΔT = -982 / 1.185
ΔT = -828.7 °C
Thus, the temperature will decrease by -828.7 °C
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Fats can be broken apart in a process called saponification. In which solution will this process most likely occur?
an aqueous solution of a strong acid at a temperature near 0°C.
an aqueous solution of a strong base at a temperature near 100°C
an aqueous solution of a mild acid at room temperature
an ether solution that contains carbon tetrachloride at room temperature
Fats can be broken apart in a process called saponification, which most likely will occur in an aqueous solution of a strong base at a temperature near 100°C (Option B).
What is the chemical process of saponification?The chemical process of saponification refers to the hydration capable of breaking down different types of ester chemical bonds between the subunits of a lipid molecule, which may be composed of fatty acid chains and or a glycerol backbone.
The chemical process of saponification is enhanced by the presence of a strong base and high temperature capable of denaturing the chemical bonds of the lipid molecule.
Therefore, with this data, we can see that the chemical process of saponification is most likely to occur in presence of a strong base that breaks the ester bonds of the lipid molecules, which are generally composed of a glycerol backbone.
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Which identifies an oxidation-reduction reaction?
a double replacement reaction
a neutralization reaction
a reaction in which oxidation numbers change
a reaction in which no electrons are transferred
Answer:
c. a reaction in which oxidation numbers change
Explanation:
In an oxidation reaction there is loss of electrons whereas in a reduction reaction there is gain of electrons. Therefore, a reaction in which oxidation numbers change identifies an oxidation-reduction reaction.
Answer:
C: a reaction in which oxidation numbers change.
Explanation:
If you had 1.0 L of 0.25 M LiOH - how many moles of OH- ions were produced when LiOH was dissolved in water?
a) How many moles of LiOH do you have in 1.0 L of 0.25 M LiOH?
b) What is the mole to mole ratio of LiOH to OH- in the balanced chemical equation?
c) How many moles of OH- are in 1.0 L of 0.25 M LiOH?
d) Bonus: What is the pH?
a) The number of moles of LiOH in 1.0L of 0.25M LiOH is 0.25.
b) The mole-to-mole ratio of LiOH to OH⁻ is 1:1.
c) The number of moles of OH⁻ ions in 1.0L of 0.25M LiOH is 0.25.
d) The pH is equal to 13.39.
What is a mole?A mole can be defined as a unit for the measurement of a huge number of entities of atoms, molecules, ions, or other particular particles. The number of entities constitute in one mole is equal to 6.023 × 10 ²³ which is known as Avogadro’s constant.
The dissociation of LiOH in water is as:
LiOH (aq) → Li⁺(aq) + OH⁻(aq)
The mole-to-mole ratio of LiOH to OH- in the balanced chemical equation is 1 : 1 as one mole of LiOH produces one mole of OH⁻ ions.
Given, the number of concentrations of LiOH solution = 0.25 M
The volume of the solution = 1.0 L
The number of moles of LiOH = Molarity ×Volume
n = 0.25 × 1
n = 0.25 mol of LiOH
The number of moles of ions of OH⁻ from LiOH = 0.25 mol
We know that pH + pOH = 14
pH = 14 -pOH
pH = 14 - (-log [OH⁻])
pH = 14 + log (0.25)
pH = 13.39
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Consider a heat engine that uses reservoirs at 800°C and 0°C.
(a) Calculate the maximum possible efficiency.
(b) If Qh is 1000 J, find the maximum value of -w and the minimum value of -Qc. R = 8,314 J/mol. K
The maximum possible efficiency of the heat engine that uses reservoirs at 800°C and 0°C is 74%.
Maximum efficiency is mainly calculated for heat engines.
Let the starting temperature be T1 and the 2nd temperature is T2.
Since the given temperatures are in Celcius form, we have to first convert the temperatures into Kelvin form for proper calculation of maximum efficiency.
So, T1 = 0 + 273 = 273 K
T2 = 800 + 273 = 1073 K
We know,
Maximum efficiency = (T2- T1)/T2
= (1073 - 273) / 1073
= 800 / 1073
= 0.74
= 74 %
Therefore, the maximum efficiency of the heat engine will be 74%.
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A 135.0-g sample of a metal at 153.0 °C is added to 255.0 g of ethylene glycol (specific heat = 2.43 J/g･ °C) in a calorimeter at 25.7 °C. The temperature of the ethylene glycol rises to 38.2 °C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the ethylene glycol.A 135.0-g sample of a metal at 153.0 °C is added to 255.0 g of ethylene glycol (specific heat = 2.43 J/g･ °C) in a calorimeter at 25.7 °C. The temperature of the ethylene glycol rises to 38.2 °C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the ethylene glycol.
Answer:
q
=
−
176000
J
×
1
k
J
1000
J
=
−
176
k
J
The specific heat capacity of the metal can be calculated using calorimetric equation. The specific heat capacity of the metal is 0.499 J/g °C.
What is specific heat capacity?Specific heat capacity of a substance is the heat energy required to rise its temperature by one degree Celsius per one gram. It is an intensive property and thus constant for a substance.
The calorimetric equation connecting the mass m, specific heat capacity c, temperature difference ΔT with the heat energy q is written as :
q = m c ΔT .
Given the heat energy of the metal is lost to ethylene glycol. Hence the heat energy change for both of the substance are equal and can be written as follows:
135 g × (153 -38.2 °C ) × c = 255 g × 2.43 J/g °C × (38.2 -25.7 °C)
c = [ 255 g × 2.43 J/g °C × (38.2 -25.7 °C) ] / [ 135 g × (153 -38.2 °C ) ]
= 0.499 J/g °C.
Hence, the specific heat capacity of the metal is 0.499 J/g °C..
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Which element is used in "yellow" muted lights?
sodium
carbon
nitrogen
aluminum
Sodium is used in "yellow" muted lights because it produces a yellow-orange light when it is heated.
What is Sodium?
Sodium is a chemical element with atomic number 11 and the symbol Na (derived from the Latin natrium). It is a delicate, silvery-white metal that is very reactive. Due to its placement in group 1 of the periodic table, sodium is an alkali metal. 23Na is the only stable isotope of it. The free metal must be prepared from compounds because it does not exist in nature. The sixth most common element in the crust of the Earth is sodium, which can be found in a variety of minerals like feldspar, sodalite, and halite (NaCl). Since the action of water has been leaching sodium ions from the minerals of the Earth for aeons, many salts of sodium are highly water-soluble. As a result, sodium and chlorine are the most prevalent dissolved elements by weight in the oceans.
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One of the main components of an airbag is the gas that fills it. As part of the design process, you need to
determine the exact amount of nitrogen that should be produced. Calculate the number of moles of
nitrogen required to fill the airbag. Show your work. Assume that the nitrogen produced by the chemical
reaction is at a temperature of 495°C and that nitrogen gas behaves like an ideal gas. Use this fact sheet
u to review the ideal gas law.
The number of moles of the gas is 0.016 moles
The airbag reaction is the nitrogen gas obtained by the decomposition of sodium azide and the reaction is
2NaN₃ → 2Na + 3N₂
Then it is under ideal condition
P = 1atm
V = 1L
T = 495°C or 768 K
n = ?
We have to calculate moles of nitrogen = ?
R = 0.082 atm LK⁻¹mol⁻¹
So the formula is
PV =nRT
n = PV/RT
n = 1 atm×1L/0.082 atm LK⁻¹mol⁻¹×768 K
n = 0.016 moles
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You have a sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. What is the molar mass of this unknown gas?
A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. the molar mass of this unknown gas is
given that :
the mass of unknown gas = 4.5 g
number of moles of unknown gas = 0.14 mol
the number of moles is given as :
number of moles = mass / molar mass
molar mass of unknown gas = mass / moles
= 4.5 / 0.14
= 32.14 g/mol
Thus, A sample containing 4.5 g of an unknown gas. Based on the volume, temperature, and pressure of the sample, there are 0.14 moles of gas present. the molar mass of this unknown gas is
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While bowling, Sean stands 19 meters away from the pins and throws his bowling ball down the lane. The ball rolls at a constant velocity of 7.2meterspersecond toward the pins. How far will the ball roll in 2.5seconds?
Max Points, 4 Parts,
1. explain to John Dalton what his Solid Sphere Model got correct, and what it got incorrect
2. explain to Dmitri Mendeleev what his periodic table got correct, and what it got incorrect
3. explain to Ernest Rutherford what Niels Bohr's model of the atom would eventually improve compared to his own Nuclear Model
4. Isaac Newton was actually an avid alchemist (popular with the learned thinkers in the 17th century). He began studying chemistry but eventually grew bored of it for the perceived excitement of alchemy. In 1-2 paragraphs, convince Isaac Newton to toss aside his alchemy fixation for true chemistry
The assumption that an atom is indestructible is refuted by the fact that it can be further split into protons, neutrons, and electrons.
However, an atom is the smallest particle involved in chemical reactions. According to Dalton, every aspect of an element's atoms is the same.
The atom is the smallest unit of matter that may be divided without generating particles with an electrical charge. It is also the smallest material with properties resembling chemical elements. As a result, the atom acts as the basic building block of chemistry. Examine various electron configurations in the electron shells that enclose the atomic nucleus of an atom.
Examine various electron configurations in the electron shells that enclose the atomic nucleus of an atom. An atom is primarily made of space. The rest is made up of a positively charged nucleus made up of protons and neutrons that is surrounded by a cloud of negatively charged electrons. The nucleus is small and dense in comparison to electrons, which are the lightest charged particles in nature.
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At 5:00 A.M. the temperature was
7 degrees below zero. At 8:00 A.M. the temperature is 7 degrees above zero. Is the weather getting warmer or colder?
A) warmer
B) colder
Answer:
A) Warmer
Explanation:
it says above 0
Aluminum can be made by reducing alumina Al2O3 by carbon in the reaction equation
2 Al2O3 + 3 C → 4 Al + 3 CO2
according to. How much carbon is needed to reduce Al2O3 to produce 491 grams of pure aluminum? To give an answer to the gram, be sure to add the unit g after the numerical value of your answer.
Taking into account the reaction stoichiometry, 163.67 grams of C is needed to reduce Al₂O₃ to produce 491 grams of pure aluminum.
Reaction stoichiometryIn first place, the balanced reaction is:
2 Al₂O₃ + 3 C → 4 Al + 3 CO₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al₂O₃: 2 molesC: 3 molesAl: 4 molesCO₂: 3 molesThe molar mass of the compounds is:
Al₂O₃: 102 g/moleC: 12 g/moleAl: 27 g/moleCO₂: 44 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Al₂O₃: 2 moles ×102 g/mole= 204 gramsC: 3 moles ×12 g/mole= 36 gramsAl: 4 moles×27 g/mole= 108 gramsCO₂: 3 moles×44 g/mole= 132 gramsMass of carbon requiredThe following rule of three can be applied: if 108 grams of Al are produced by 36 grams of C, 491 grams of Al are produced by how much mass of C?
mass of C= (491 grams of Al× 36 grams of C)÷ 108 grams of Al
mass of C= 163.67 grams
Finally, 163.67 grams of C is required.
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20. (01.08 MC)
Alchemy is a branch of ancient knowledge that states that all matter is composed of air, fire, earth, ar
Which of these best explains whether alchemy is a science or pseudoscience? (4 points)
It is a science because all matter is known to be made of elements.
it is a science because air, fire, earth, and water all are forms of matter.
It is pseudoscience because all matter is known to be made of atoms.
It is pseudoscience because ancient knowledge is mystical yet reliable.
It is pseudoscience because each metal is known to be a unique element alchemy is a science or pseudoscience.
What is a matter in chemistry?Matter is anything that occupies space and has mass; in other respects, matter is the "thing" that the cosmos is made of. The fundamental constituents of all stuff are called elements. These are not changed into other elements by conventional chemical processes and have distinct chemical and physical properties.
What does matter consist of?Matter can be solid, liquid, or gaseous on Earth. Solid particles, fluids, and gases are supported by the exceptionally small building components known as atoms and molecules. A solid's component particles are attracted to one another strongly. They are close to one another and vibrate en position without passing each other.
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The complete question is -
Alchemy is a branch of ancient knowledge that states that all matter is composed of air, fire, earth. Which of these best explains whether alchemy is a science or pseudoscience?
A-It is a science because all matter is known to be made of elements.
B-It is a science because air, fire, earth, and water all are forms of matter.
C-It is pseudoscience because all matter is known to be made of atoms.
D-It is pseudoscience because ancient knowledge is mystical yet reliable.
E-It is pseudoscience because each metal is known to be a unique element.
Which of the following is involved in bonding between atoms?
Select one:
O a. neutrons
O b. protons
O c. electrons
O d. the nucleus
The following is involved in bonding between atoms is electron
There are four type of chemical bonds essential for life to exist and it is ionic bond, covalent bond, hydrogen bond, and Vander wall interaction and all of these are different kind of bond to play various role in biochemical interaction and the electron on the outermost energy level of the atom are called valence electron and the valence electron are involved in bonding one atom yo another
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Calculate the molarity of 25.7 g of MgS in 919 mL of solution.
What do you mean by molarity?
Molarity-Molarity is a term that is used to show concentration of the solution . It is different from molality as it is expressed in mol per L , whereas molality is expressed in mol per kg.
Given:
Mass of Mgs is 25.7 g.Volume of the solution is 919 ml.The mole of Mgs is calculated as follows :
Mole= Mass / Molar Mass
= 25.7g/56.38 g/mol
= 0.455 mol.
The molarity of Mgs solution is calculated as follows :-
Molarity =Mole/Volume ( L )
=0.455mol/919ml* 1000ml/1L
=0.495M
Thus, the molarity of the solution is 0.495 M.
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