¡A que clasificación corresponden las sustancias que están formadas por un mismo tipo de átomos, es homogénea y no puede descomponerse por medios químicos?
Answers
Answer:
Elementos.
Explicación:
Los elementos son las sustancias puras que están formadas por el mismo tipo de átomos, es homogéneo y no se puede descomponer por medios químicos. El elemento tiene el mismo tipo de átomos que son similares en tamaño y forma. Es un tipo de materia pura que tiene solo un tipo de átomos y no se puede descomponer más porque no está hecha de dos sustancias, es solo una sustancia, por eso no se puede descomponer por medios químicos.
Related Questions
Which particles are transferred during a redox reaction
Answers
Answer:
Most oxidation-reduction (redox) processes involve the transfer of oxygen atoms, hydrogen atoms, or electrons, with all three processes sharing two important characteristics: (1) they are coupled—i.e., in any oxidation reaction a reciprocal reduction occurs, and (2) they involve a characteristic net chemical change— .
Electrons will be transferred during redox reaction.
What is electron?The electron is subatomic particles which are placed in surrounding the nucleus. Electrons carry negative charge.
What is redox reaction?Redox reaction involve the transfer of electrons between intermediates. A redox reaction occurs when the oxidation states of the substrate change. The removal of electrons or even a rise in the oxidation state of such a chemical or its atoms is referred to as oxidation. The acquisition of electrons or a lowering in the oxidation number of a chemical or the atoms inside it is referred to as reduction.
Hence the answer will be electron
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explain how the smell of perfume can move throughout a room
Answers
Answer:
Diffusion in gases
When chemical substances such as perfume are let loose in a room, their particles mix with the particles of air. The particles of smelly gas are free to move quickly in all directions. They eventually spread through the whole room from an area of high concentration to an area of low concentration.
Explanation:
Which reaction displays an example of an arrhenius base? naoh(s) right arrow. na (aq) oh–(aq) hcl(g) h2o(l) right arrow. h3o (aq) cl–(aq) ch3cooh(aq) h2o(l) right arrow. h3o (aq) ch3coo–(aq) nh3(aq) hc2h3o2(aq) right arrow. nh4 (aq) c2h3o2–(aq)
Answers
The reaction which displays an example of an arrhenius base is
NaOH(s) → Na⁺(aq) + OH⁻(aq).
What is Arrhenius base?According to the Arrhenius theory, those substance which gives H⁺ ion to the aqueous solution is acid and which gives OH⁻ ion to the aqueous solution is known as base.
All given chemical reactions will display an arrhenius acid, but only one reaction display as a arrhenius base as they gives OH⁻ ion to the aqueous solution and that reaction will be:
NaOH(s) → Na⁺(aq) + OH⁻(aq)
Hence option (1) is correct.
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Answer:
A: NaOH(s) ---> Na+(aq) + OH–(aq)
Explanation:
Louisa put a bowl of water and a bowl of sand in the sun. She put a thermometer in each bowl. Then she recorded the temperature at the start and after 30 minutes. After 30 minutes, the sand had heated more than the water.
Louisa’s experiment proved that
Responses
A different materials absorb the same amount of heat
B sunlight heats liquids more than solids
C sunlight does pass through water
D different materials heat up at different rates
Answers
The experiment that was carried out by Louisa goes to show us that different materials heat up at different rates.
What is the specific heat capacity?The term specific heat capacity just goes to show us the amount of heat that must be absorbed before the temperature of an object would rise by 1 K. In this case, we can see that we have been told that the after 30 minutes, the sand had heated more than the water. This simply implies that the energy that the sand and the water absorbed was able to increase the temperature of the sand mush more than it increased the temperature of the water.
Thus we can see that the heat capacity of the sand is much less than the heat capacity of the water since the sand could be able to be heated up much faster than the the water could be heated up.
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What is the best way to make a supersaturated solution?
Answers
Answer:
A
Explanation:
please help with this greatly appreciated
Answers
It is true that according to Hubble's law, the farther away a galaxy is, the faster it is moving away from us.
It is true that the formation of a star occurs when nuclear fusion begins to fuse light elements into heavier ones;
The distance to the nearest stars can be determined by parallax, the apparent shift of a start against background stars observed as the earth moves along its orbit. (Option B)
Based on the accompanying H-R Diagram, the type of start that has the greatest temperature is the blue giants (Option C)
Two hydrogen atoms come together in a nuclear fusion reaction to produce Helium Gas. (Option A).
What is Hubble's Law?Hubble's law, which essentially states that the velocity of a galaxy (or, as it is commonly plotted, its redshift) is precisely proportionate to its distance, also reveals crucial information about the condition of the universe. There should be no relationship between distance and velocity if the cosmos is static and unchanging.
Hubble's law is the physical cosmology observation that galaxies move away from Earth at a rate proportionate to their distance. In other words, the farther they are from Earth, the quicker they are travelling away.
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4 Elliot has some stearic acid. It is in the solid state.
a Describe how Elliot could use the apparatus below to measure the melting point of his
stearic acid.
Answers
Answer:
it is in solid state
Explanation:
at 100% heat
At regular intervals, check the stearic acid's temperature. Make a note of the findings and create a temperature vs time graph.
What is Temperature?The physical concept of temperature indicates in numerical form how hot or cold something is. A thermometer is used to determine temperature. Thermometers are calibrated using a variety of temperature scales, which historically defined distinct reference points and thermometric substances.
For above given example, check the temperature of the stearic acid often and make a note of the results and plot the temperature against time.
Temperature is not the same as the energy of a thermodynamic system; for instance, an iceberg has a significantly larger total heat energy than a match, despite the fact that a match is burning at a much higher temperature.
Thus, at regular intervals, check the stearic acid's temperature. Make a note of the findings and create a temperature vs time graph.
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The last point of comparison is to look at oxygen isotope data for this time interval. It is a tricky business to estimate temperature from isotope values from so long ago because quite a bit can change about both oceans and organisms over such a long time. People who study these super ancient isotope records feel that some corrections are needed to account for these changes. I am mostly (but not 100%) convinced that they are justified. If you want, I can give you the paper where they explain the basis for the corrections, but it involves some serious chemistry.
C) Chemical proxies for temperature
In the graph below, the uncorrected values are shown with the blue line. The corrected values are shown with either the red or the dashed black line (there are two different ways of doing the corrections). They are roughly the same, so let's use the dashed black line as it is a little easier to see. 5) How well do the uncorrected dOvalues correspond with CO, levels? What about the corrected dashed black line? Sometimes we are looking at whether something is increasing or decreasing. In this case I want you to also look at where the values lie relative to today (the horizontal dashed line at 0°C)
6) Does this argue for or against the notion that CO2 concentration is one of
Answers
We can analyze the relationship between the uncorrected dO (oxygen isotope) values and CO2 levels, as well as the corrected dashed black line values.
In terms of the uncorrected dO values, it is unclear how well they correspond with CO2 levels since the specific correlation or trend is not mentioned. Without further details or data, we cannot determine the exact relationship between the uncorrected dO values and CO2 levels.
However, regarding the corrected dashed black line values, we can observe their alignment with the horizontal dashed line at 0°C, which represents today's temperature. By assessing where the corrected values lie relative to this line, we can gain insights into temperature changes over time.
Based on the information provided, we cannot definitively conclude whether this argues for or against the notion that CO2 concentration is one of the main drivers of climate change. The given context focuses on comparing the dO values with CO2 levels and temperature, without explicitly addressing the relationship between CO2 concentration and climate change. To draw conclusions about the impact of CO2 concentration on climate change, further analysis and information about the specific trends and patterns are required.
Overall, without additional data and details, it is challenging to determine the exact correspondence between the uncorrected dO values and CO2 levels, as well as the implications for the role of CO2 concentration in climate change. Further examination of the provided paper and relevant scientific literature would provide a more comprehensive understanding of the topic.
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Simple Diffusion and Facilitated Diffusion are both examples of what type of transport?
Answers
Answer:
These processes can be categorized using many different subdivisions, but one way that can classify them is their movement with respect to the concentration gradient. Both processes move from a region of high to low concentration.
Unlike in Active Transport where the movement of solutes and other molecules is in the inverse direction from low to high concentration.
How many valence electrons should you use to draw a lewis structure of ammonia (nh3)? responses 3 3 5 5 8 8 15
Answers
The number of valence electrons of ammonia in a lewis structure is 8.
A lewis structure can be described as the simplified representation of the outer shell electrons in a molecule.
A valence electron refers to an electron that is in the outer shell associated with an atom.
Ammonia has a total of 1 nitrogen and 3 hydrogen atoms. Nitrogen has 5 valence electrons while Hydrogen has a valence of 1. In an ammonia molecule, nitrogen completes its octet shell by sharing three electrons with the three hydrogen atoms. Therefore the number of valence electrons in ammonia will be;
ammonia = 5 + 1 + 1 + 1 = 8
Therefore, the number of valence electrons of ammonia is calculated to be 8.
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Answer:
8
Explanation:
When a sample of Mg is combusted in a bomb calorimeter, 25.4 kJ of energy as heat is evolved. The calorimeter contains 7.50 x 102 g of water at an initial temperature of 18.6 °C. The specific heat capacity of water is 4.184 J/gLaTeX: \cdot⋅°C and the heat capacity of the bomb is 8.20 x 102 J/°C. Calculate the final temperature of the water and the bomb
Answers
Answer:
x = 25.02 or 25°c
Explanation:
Given:
mass of water : 7.50×10² =750 gm
Ccal = 8.20× 10² = 820 J/°c
Let assume final temp = x°c
then, heat gained by the water + heat gained by calorimeter
= 25400 J
⇒ Mw × Cw× ΔTw+ Ccal ×ΔT = 25400
⇒ 750× 4.184 × (x - 18.6) + 820 ×(x-18.6) = 25400
⇒ x = 25.02 or 25°c
if the crystal field splitting o is 0.256 aj for a copper complex, what wavelength of light (in nm) is absorbed when an electron from a lower energy d orbital is promoted to a higher energy d orbital?\
Answers
Therefore, the wavelength of light absorbed when an electron is promoted from a lower energy d orbital to a higher energy d orbital in this copper complex is approximately 783 nm.
To calculate the wavelength of light absorbed, we need to use the formula:
ΔE = hc/λ
where ΔE is the energy difference between the two d orbitals, h is Planck's constant (6.626 x 10⁻³⁴ J s), c is the speed of light (2.998 x 10⁸ m/s), and λ is the wavelength of light.
The energy difference between the two d orbitals can be calculated using the crystal field splitting parameter:
ΔE = 0.256 x 10⁻¹⁸ J
Substituting these values into the equation, we get:
0.256 x 10⁻¹⁸ J = (6.626 x 10⁻³⁴ J s)(2.998 x 10⁸ m/s)/λ
Solving for λ, we get:
λ = (6.626 x 10⁻³⁴ J s)(2.998 x 10⁸ m/s)/(0.256 x 10⁻¹⁸ J)
λ = 7.83 x 10⁻⁷ m
= 783 nm
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the ksp equation for sodium bicarbonate (nahco3) should be written as:
Answers
The Ksp equation for sodium bicarbonate (NaHCO3) should be written as:
Ksp = [Na+][HCO3-]
In this equation, Ksp represents the solubility product constant, [Na+] represents the concentration of sodium ions (Na+), and [HCO3-] represents the concentration of bicarbonate ions (HCO3-).
The concentration of the sodium ions and bicarbonate ions in the solution are represented by [Na+] and [HCO3-], respectively. Ksp is a constant at a given temperature and represents the product of the concentration of the ions raised to their stoichiometric coefficients in the balanced chemical equation.
This equation is useful for calculating the solubility of NaHCO3 in a given solvent, as well as predicting the formation of precipitates when two solutions containing ions that can form an insoluble salt are mixed.
If the product of the ion concentrations exceeds the Ksp value, the solution becomes supersaturated, and a precipitate forms.
In summary, the Ksp equation for sodium bicarbonate (NaHCO3) is a measure of its solubility in water, and it relates to the concentration of sodium ions (Na+) and bicarbonate ions (HCO3-) in the solution.
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Which of the following is an example of a chemical change?
Answers
A. Boiling water
B. Burning paper
C. Dissolving sugar in water
D. Melting gold
Answers
Answer:
Dissolving sugar in water, burning paper, and melting gold are all chemical changes
Explanation:
The action cannot be reversed, or undone. Therefore it is a chemical change.
Boiling water is a physical change.
explain how to make one liter of a 1.25 molal ammonium hydroxide solution.
Answers
Thus, to make a 1.25 molal ammonium hydroxide solution, one needs to dissolve 43.82 g of ammonium hydroxide in 1 liter of water.
In chemistry, a molality (molal concentration) is the measure of the number of moles of solute per kilogram of solvent. Ammonium hydroxide is a chemical compound that is formed from the reaction between ammonia and water. To make a 1.25 molal ammonium hydroxide solution, one needs to first calculate the number of moles of ammonium hydroxide required to make one liter of the solution.
The molar mass of ammonium hydroxide is 35.05 g/mol. Thus, to make a 1 liter of 1.25 molal ammonium hydroxide solution, we need 43.82 g of ammonium hydroxide. Next, one can add 43.82 g of ammonium hydroxide to the water and stir the solution until the solute has completely dissolved. After the solute has dissolved, one can add more water to the solution to bring the total volume to 1 liter. Thus, to make a 1.25 molal ammonium hydroxide solution, one needs to dissolve 43.82 g of ammonium hydroxide in 1 liter of water.
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Students conduct an experiment:
They placed Vinegar in a bottle and Baking Soda in a ballon...
They then placed the ballon on the bottle and proceeded to drop the baking soda into the bottle.
The students drew the following:
EXPLAIN BELOW THE PICTURE WHAT KIND OF CHANGE DID THEY OBSERVE AND THE PROOF.
Your answer:
Answers
Answer:
The balloon becomes inflated
Explanation:
The equation of the reaction between baking soda (sodium bicarbonate) and vinegar(ethanoic acid) is shown below;
NaHCO3 + HC2CH3O2 ------> NaC2H3O2 + H2O + CO2
The gas (CO2) evolved in the process leads to the inflation of the balloon dropped on the bottle in which the reaction is taking pace.
This observation provides evidence that a gas was really evolved in the reaction.
(e) every element in D n; so find a formula for |r^i s^j| in terms of i,j,n. 2. (5 pts) Let G be a finite group and H≤K≤G. Prove that [G:H]=[G:K][K:H].
Answers
The formula for |\(r^i s^j\)| in terms of i, j, and n is |\(r^i s^j\)| = n/(gcd(i, n) * gcd(j, n)).
What is the formula for |\(r^i s^j\)|?To find the formula for |\(r^i s^j\)|, we need to consider the elements in Dn, which is the dihedral group of order 2n.
The formula is given by |\(r^i s^j\)| = n/(gcd(i, n) * gcd(j, n)), where r and s are generators of the group and i, j, and n are integers.
In this formula, gcd(i, n) represents the greatest common divisor of i and n, while gcd(j, n) represents the greatest common divisor of j and n.
By calculating these gcd values and applying them in the formula, we can determine the order of the element |\(r^i s^j\)| in Dn.
In the dihedral group Dn, which consists of symmetries of a regular polygon with n sides, finding the order of an element |\(r^i s^j\)| involves considering the powers of the generators r and s.
The formula |\(r^i s^j\)| = n/(gcd(i, n) * gcd(j, n)) provides a concise expression for determining the order of the element based on the values of i, j, and n.
The greatest common divisors (gcd) play a crucial role in this formula, as they account for the repetitions and patterns in the group elements.
By applying the formula, we can efficiently calculate the order of |\(r^i s^j\)| in Dn.
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in chemistry class, students have been discussing the differences between physical and chemical changes. the students carried out several procedures and recorded their observations. the students determined that one of the procedures is an example of a physical change, but not a chemical change.
Answers
Answer:
C, Reactants rearrange to form new products
Explanation:
calculate the amount of heat released from combustion of 2 g of wood. the heat capacity of the bomb calorimeter is 9.96 kj/°c .
Answers
If the heat capacity of the bomb calorimeter is 9.96 kj/°c, then the amount of heat released from combustion of 2 g of wood is 39.84 kJ.
To determine the amount of heat released from combustion of 2 g of wood, you need to use the formula
Q = C × ΔT Where:Q is the heat released or absorbed in joules (J)C is the heat capacity of the bomb calorimeter (given as 9.96 kJ/°C)ΔT is the change in temperature in degrees Celsius (°C)We can assume that all the heat released from the combustion of the wood is absorbed by the calorimeter, so we can use the heat capacity of the calorimeter to calculate the heat released. Since the calorimeter absorbs the heat, the value of Q will be negative (i.e. the heat is released).
Given: Mass of wood = 2 g Heat capacity of the bomb calorimeter = 9.96 kJ/°C First, we need to calculate the change in temperature. This can be done by measuring the temperature of the calorimeter before and after combustion. Let's assume that the temperature increases by 4.0 °C.ΔT = 4.0 °C Now, we can calculate the heat released: Q = C × ΔTQ = (9.96 kJ/°C) × (4.0 °C)Q = 39.84 kJ
Therefore, the amount of heat released from combustion of 2 g of wood is 39.84 kJ.
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4,0,0,-1/2 element in quantum numbers?
Answers
The element that has the quantum numbers that have been shown is calcium.
What are the quantum numbers?We know that the quantum numbers has to do with the number that shows the arrangement of the electrons that we find in the atom. We know that the manner in which the electrons can be filled in the atom can be given by the Aufbau principle.
Now we know that we have the quantum numbers; 4,0,0,-1/2. The implication of this is that the electron is in a 4s shell from the quantum numbers that we have here.
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_______ bonds are moderately strong, but they are easily disrupted in the presence of water. A. ionic B. hydrogen C. molecular D. covalent
Answers
Hydrogen bonds are moderately strong but they are easily disrupted in the presence of water. ( option B )
Ionic bonds involve the transfer of electrons from one atom to another to form a bond and hence, are strong bonds.Molecular and covalent bonds involve sharing electrons to form bonds and hence cannot be disrupted by water.On the other hand, hydrogen bonds are formed between a hydrogen atom and an electronegative atom. These are comparatively weaker than the other bonds mentioned. Water can easily disrupt these bonds.Therefore, the hydrogen bond is the correct answer.
1. How many moles are contained in 103.4g of sulfuric acid?
a) 2.9 * 10^22 molecules of sulfuric acid
b) 5.18 * 10^24 molecules of sulfuric acid
c)12.1 * 10^23 molecules of sulfuric acid
d) 6.35 * 10^23 molecules of sulfuric acid
Answers
Match the following items. 1. way light reflects from a mineral streak 2. way a mineral breaks under stress luster 3. reveals true, natural color of a mineral cleavage 4. least reliable property for identification color 5. measured using the Mohs scale hardness
Answers
Answer:
The following is the correct match:
1. Luster refers to how the reflection of the light takes place from a mineral.
2. Cleavage signifies a manner in which the dissociation of a mineral occurs at the time of stress.
3. Streak helps in the identification of a true and natural color of a mineral.
4. Color is the least reliable characteristic of determination.
5. Hardness is determined with the application of the Mohs scale.
Given that S is the central atom, write a Lewis structure of OSF4 in which the formal charges of all atoms are zero.
Answers
A Lewis structure is a schematic illustration of a compound that shows the atoms and their associated electrons.
What does OSF4's Lewis structure look like?
14 lone pairs in total make up the OSF4 Lewis structure.
Since every electron in S participates in bonding,
there are no lone pairs in the molecule. Since the oxygen atom shares two electrons with the sulphur atom, there are only two lone pairs left in oxygen. Each F holds three lone pairs and contributes one electron to sulphur.
What atom in osf4 is the main one?
S will be our main atom as a result.
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PLEASE HELP!!!!
Educere question
Oxidation can be described as:
A. the addition of an OH group.
B. the loss of oxygen.
C. the gain of electrons.
D. the loss of electrons.
Answers
Answer:
it is D.
Explanation:
while reduction is a process of gaining electrons oxidation is opposite signifying that it losses electrons
Oxidation is a chemical process in which a substance loses electrons.
Option (D) is correct.
When a species undergoes oxidation, it becomes more positive in charge or less negative, losing its ability to hold onto its electrons. This can occur in various chemical reactions, such as when a metal corrodes or when a compound reacts with oxygen. The term "oxidation" originates from reactions with oxygen, but it has a broader meaning in chemistry.
Oxidation is often accompanied by a reduction reaction where another species gains the lost electrons. This interconnected process is known as redox (reduction-oxidation) reactions. In redox reactions, electrons transfer from one species to another, resulting in changes in their oxidation states. Understanding oxidation and reduction is crucial in various fields, including biochemistry, environmental science, and industrial processes.
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The complete question is:
Oxidation can be described as:
A. the addition of an OH group.
B. the loss of oxygen.
C. the gain of electrons.
D. the loss of electrons.
HA(aq)+H2O(l)⇄A−(aq)+H3O+(aq)ΔG°=+35kJ/molrxnBased on the chemical equation and ΔG° given above, which of the following justifies the claim that HA(aq) is a weak acid?ABecause ΔG°>>0, Ka>>1 , and HA completely dissociates.BBecause ΔG°>>0, Ka>>1, and HA almost completely dissociates.CBecause ΔG°>>0, Ka<<1, and HA only partially dissociates.DBecause ΔG°>>0, Ka<<1, and HA does not dissociate.
Answers
The answer is C) Because ΔG°>>0, Ka<<1, and HA only partially dissociates.
A positive ΔG° value indicates that the reaction is not spontaneous under standard conditions, and thus the reaction favors the reactants. In this case, the forward reaction (dissociation of HA) is not favored, and therefore, HA is a weak acid, meaning that it only partially dissociates in water. The Ka value for a weak acid is small, indicating that the acid only partially dissociates.
Therefore, option C is the correct answer.
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Question 4 of 33
C
Q-Science-Gr7-SQSA1-CBT (2020-21)
Question: 1-4
Dead sean animals fall to the bottom of the ocean. A scientist notices rock layers that have formed on the ocean bottom with fossils of some of these animals. What type of rock
1.Lava
2.igneous
3.sedimentary
4.metamorphic
Answers
Answer:
The answer is Sedimentary
Explanation:
Thank you so much if that helps you!!!!
HELPPPPP NOWWWWW!!!!!!!
Answers
Answer:
Under the concept of popular sovereignty, the people of each territory would decide whether or not slavery would be permitted.
Explanation:
How many grams of oxygen is required to react with 250 grams of iron?
Answers
Approximately 107.2 grams of oxygen are required to react with 250 grams of iron.
To determine the amount of oxygen required to react with 250 grams of iron, we need to consider the balanced chemical equation for the reaction between iron and oxygen. The balanced equation is:
4 Fe + 3 O2 -> 2 Fe2O3
From the balanced equation, we can see that 4 moles of iron react with 3 moles of oxygen to produce 2 moles of iron(III) oxide (Fe2O3).
To calculate the amount of oxygen needed, we can follow these steps:
Calculate the molar mass of iron (Fe):
Molar mass of Fe = 55.845 g/mol
Calculate the molar mass of oxygen (O2):
Molar mass of O2 = 2 * 16.00 g/mol = 32.00 g/mol
Convert the mass of iron to moles:
Moles of Fe = Mass of Fe / Molar mass of Fe
Moles of Fe = 250 g / 55.845 g/mol
Use the mole ratio from the balanced equation to determine the moles of oxygen:
Moles of O2 = (Moles of Fe * 3) / 4
Convert the moles of oxygen to grams:
Mass of O2 = Moles of O2 * Molar mass of O2
Now let's calculate the values:
Molar mass of Fe = 55.845 g/mol
Molar mass of O2 = 32.00 g/mol
Moles of Fe = 250 g / 55.845 g/mol ≈ 4.47 mol
Moles of O2 = (4.47 mol * 3) / 4 ≈ 3.35 mol
Mass of O2 = 3.35 mol * 32.00 g/mol ≈ 107.2 g
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Please help me fast
Calculate the molar mass of the following substances
Answers
a) To convert 1.65 moles of magnesium chloride to grams, we need to first determine the molar mass of MgCl.
The molar mass of MgCl is the sum of the atomic masses of magnesium and chlorine:
Mg: 24.31 g/mol
Cl: 35.45 g/mol
Molar mass of MgCl = 24.31 g/mol + 35.45 g/mol = 59.76 g/mol
Now, we can use the molar mass to convert 1.65 moles to grams:
1.65 moles x 59.76 g/mol = 98.70 grams
Therefore, 1.65 moles of MgCl is equal to 98.70 grams.
b) To convert grams of Na2CO3 to moles, we need to first determine the molar mass of Na2CO3.
The molar mass of Na2CO3 is the sum of the atomic masses of sodium, carbon, and oxygen, taking into account the two sodium atoms in each molecule:
Na: 22.99 g/mol
C: 12.01 g/mol
O: 16.00 g/mol
Molar mass of Na2CO3 = (2 x 22.99 g/mol) + 12.01 g/mol + (3 x 16.00 g/mol) = 105.99 g/mol
Now, we can use the molar mass to convert grams to moles:
1 grain = 0.06479891 grams
10 grains = 0.6479891 grams
0.6479891 g / 105.99 g/mol = 0.0061 moles
Therefore, 10 grains (0.6479891 grams) of Na2CO3 is equal to 0.0061 moles.
What is molar mass example?The molar mass (M) of a chemical product is described in chemistry as the ratio of mass to substance (measured in moles) of any sample of said molecule. The molar mass of a material is a bulk characteristic, not a molecular trait. The molar mass is an average of many occurrences of the compound, which often differ in mass due to isotopes present.
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The mοlar mass οf MgCl₂ is 95.21 g/mοl.
It is calculated by summing the atοmic masses οf all the atοms in a mοlecule οr fοrmula unit οf a substance. Mοlar mass is an impοrtant cοncept in chemistry because it allοws us tο relate the mass οf a substance tο the number οf particles (atοms, mοlecules, οr iοns) in it.
The mοlar mass οf MgCl₂ (Magnesium chlοride) can be calculated by adding the atοmic masses οf magnesium (Mg) and chlοrine (Cl) atοms in the cοmpοund.
The atοmic mass οf magnesium (Mg) is 24.31 g/mοl, and the atοmic mass οf chlοrine (Cl) is 35.45 g/mοl (apprοx). MgCl₂ has οne magnesium atοm and twο chlοrine atοms, sο its mοlar mass can be calculated as:
Mοlar mass οf MgCl₂ = (1 x 24.31 g/mοl) + (2 x 35.45 g/mοl)
= 24.31 g/mοl + 70.90 g/mοl
= 95.21 g/mοl
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