While acceleration generally decreases as mass increases, it tends to increase as force increases.Therefore, the greater force acting on more massive objects is counteracted by the enhanced inverse effect of mass.
What relationship do you suppose exists between the two masses and the rate that the heavier object descends?It is obvious from the expression above that the acceleration will be higher with a larger difference in masses.Therefore, the heavier object will move faster if the difference in mass between the two objects is higher.
Why does having less mass make acceleration easier?Mass times acceleration equals force.Therefore, the force needed to move anything will be less the smaller the mass.Additionally, less force is needed the slower your move the object.
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Calculate the pH of the resulting solution if 35.0 mL of 0.350 M HCl(aq) is added to
a) 25.0 mL of 0.450 M NaOH(aq)
ph=____
b) 45.0 mL of 0.350 M NaOH(aq).
ph= ______
If the hydrogen ion concentration in molarity (M) are known, it is possible to calculate the pH of the solution. A concentration of the h+ ions affects the pOH value, which can also be used to calculate the pH of a solution. The solution's pH value is 12.79.
What is pH that is basic?Anything with a pH of 7.0 or below is acidic, & anything with a 7.0 or higher is alkaline or basic. There is a pH scale that lists all pH values for common materials and ranges from 0 (extremely acidic) to 14 (very basic/alkaline).
Meaning of pH ?an evaluation of a substance's or solution's acidity or basicity. On a scale from 0 to 14, pH is calculated. The pH value of 7 represents neutral on this scale, i.e., no acidic nor basic. More basic substances have a pH value more than 7, whereas more acidic substances have a pH value less than 7.
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Which of the following is the strongest type of interaction that occurs between the atoms within the circled areas of the two molecules represented above
C. The interaction between the atoms within the circled areas of the two molecules represented above is a hydrogen bond.
What is hydrogen bond?A hydrogen bond is a type of interaction that occurs between a hydrogen atom that is covalently bonded to a highly electronegative atom (such as nitrogen or oxygen) and a highly electronegative atom of a different molecule. This interaction is stronger than a dipole-dipole interaction (polar covalent bond) or a London dispersion force (nonpolar covalent bond) but weaker than a covalent bond.
what are the factors involved in interaction of atoms?To confirm this, we can look at the electron density and electronegativity of the atoms involved, the geometry of the molecule, the distance between the atoms, and the strength of the bond.
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Which of the following is the strongest type of interaction that occurs between the atoms within the circled areas of the two molecules represented above
A) Polar covalent bond
B) Non polar covalent bond
C) hydrogen bond
D) london dispersion forces
1. how many moles of fes are produced from 8.50 mole of fe?
2. how many moles of sb are produced from 5.00 moles of fe?
3. how many grams of sb,s, are needed to produce 75.500 moles of fes?
4. how many moles of fe are needed to produce 14.885 grams of fes?
5. calculate the grams of fe needed to react with 7.50 moles of sb s.
Answer:
8.50 moles of Fe will produce 8.50 moles of FeS.
5.00 moles of Fe will produce 5.00 moles of Sb.
75.500 moles of FeS will require 88.150 grams of SbS.
14.885 grams of FeS will require 12.83 moles of Fe.
7.50 moles of SbS will require 37.50 grams of Fe.
Explanation:
Please Help! I need this done ASAP! Both questions please!!
Answer and Explanation for Question 3
The volume of H₂S needed to neutralize 45 mL of NH₂⁻ is 30 mL. Thus, the correct answer would be B.
To calculate this, we need to use the stoichiometric equation. First, we find the moles of NH2- present in the solution: 45 mL × 0.80 M = 0.036 moles. Then, we need to find the moles of H2S needed to neutralize this, which is equal to the moles of NH2- since the reaction is 1:1. Therefore, we need 0.036 moles of H2S. To convert this to volume, we need to divide by the molarity of the H2S solution: 0.036 mol/1.2 M = 0.03 L, or 30 mL.
Answer and Explanation for Question 4:
The indicator most appropriate for this reaction would be phenolphthalein. Thus, the correct answer would be D.
In this acid-base titration, a solution of HCl is added to an unknown concentration of a base, with the initial pH of the solution being approximately 10. As HCl continues to be added to the mixture, the pH remains relatively unchanged until 50 mL of HCl have been added, at which point the pH of the mixture drops sharply to approximately 3, indicating that the equivalence point has been reached.
Indicators can help us detect the equivalence point of a titration. Phenolphthalein changes color from pink to colorless when the pH of the mixture drops below 8.3, which is what happens in this reaction. Therefore, phenolphthalein would be the most appropriate indicator for this reaction.
Carbon monoxide is colorless, odorless and tasteless.
A. True
B. False
Answer: A. True
Explanation:
Carbon monoxide (CO) is a colorless, odorless, and tasteless gas. It is produced by the incomplete burning of fuels such as natural gas, propane, oil, wood, and coal. It has no smell, taste, or color, and it can be difficult to detect, which is why it can be dangerous. Carbon monoxide can cause symptoms such as headache, dizziness, nausea, and fatigue, and can be fatal if inhaled in large quantities. It's important to have a Carbon monoxide detector in homes and buildings to detect any possible leakage.Answer:
Explanation:
S0lution:- (A)TRUE, Carbon monoxide(CO) is a colorless,odorless and tasteless toxic gas.it was first discovered by de Lassone it consists of covalent bonds.Help help help pleasee
17. (04.03 mc)
describe the characteristics of a double replacement reaction, how it is identified, and types of compounds
in the reactants and products. give an example in your response. (10 points)
The Double displacement reaction is the reaction in which the reacting substances react and exchange the ions and forms the new product.
The The Double displacement reaction is the reaction in which the reacting substances react and exchange the ions and forms the new product. The positive ions exchange the negative ions. The general examples is given as :
A⁺B⁻ + C⁺D⁻ ----> A⁺D⁻ + C⁺B⁻
In the double displacement reaction one of the product is :
The precipitate , The water or A gas. The example is :AgNO₃(aq) + NaCl(aq) ----> AgCl(s) + NaNO₃(aq)
HNO₃(aq) + KOH(aq) ----> KNO₃(aq) + H₂O(l)
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Calculate the volume in milliliters of a 2.09 M silver nitrate solution that contains 400.mmol of silver nitrate AgNO3 . Round your answer to 3 significant digits.
The volume of the solution is 190ml.
To find the volume of a solution, we can use the formula: V = n/C, where V is the volume, n is the number of moles, and C is the concentration of the solution.
Step 1: Convert the number of millimoles of AgNO3 (400mmol) to moles by dividing by 1000. n = 400mmol/1000 = 0.4 moles
Step 2: Substitute the moles and concentration of the solution into the formula. V = 0.4 moles / 2.09 M = 0.19 moles
Step 3: Convert the volume to milliliters by multiplying by 1000. V = 0.19 moles * 1000 ml/mol = 190 ml
Hence we got the volume of the solution is 190 ml.
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20 mL of a saturated solution of KNO3 at 50 degrees Celsius is cooled to 20 degrees Celsius. Approximately what mass of solid will precipitate from this solution?
Answer:
Approximately 8.8 grams of solid KNO3 will precipitate from the solution when it's cooled from 50 degrees Celsius to 20 degrees Celsius.
Explanation:
The solubility of a solid in a liquid typically decreases as the temperature decreases. As a result, when a saturated solution is cooled, some of the solid may precipitate out of the solution.
The solubility of potassium nitrate (KNO3) in water at 20 degrees Celsius is around 42 grams per 100 milliliters of water. At 50 degrees Celsius the solubility is around 86 grams per 100 milliliters of water.
To find the mass of solid that will precipitate, we can use the difference between the solubility of KNO3 at 20 degrees Celsius and at 50 degrees Celsius.
At 20 degrees Celsius, the solubility of KNO3 is 42 g/100 mL, and at 50 degrees Celsius, the solubility is 86 g/100 mL.
So, the difference between the solubility of KNO3 at 20 degrees Celsius and at 50 degrees Celsius is 86 - 42 = 44 grams per 100 milliliters.
Since we have 20 mL of a saturated solution, we can calculate the mass of the precipitate by multiplying the difference in solubility by the volume of the solution:
44 g/100 mL * 20 mL = 8.8 grams.
So, approximately 8.8 grams of solid KNO3 will precipitate from the solution when it's cooled from 50 degrees Celsius to 20 degrees Celsius.
Please note that this is an approximate calculation and the actual amount of precipitate may vary depending on other factors such as impurities and the specific conditions of the experiment.
which of the following is not a colligative property? group of answer choices freezing point depression increasing solubility vapor pressure lowering boiling point elevation
Freezing point. The known colligative properties of a solution are freezing point depression, osmotic pressure, vapor pressure lowering, and boiling point elevation.
What do you mean by freezing explain?Freezing refers to the phase change of a substance from the liquid state to a solid-state. This is a phase change phenomenon which means that a substance is transformed from one state of matter to another state.
What is freezing give an example?The change in the liquid to the solid phase at a constant temperature is called freezing. The temperature at which liquid changes to solid is called the freezing point. Example: water-filled in an ice cube tray, when kept in the freezer, changes into solid, so here the water freezes to form ice cubes.
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you adjust the ph to 7.0. after that you add 0.005 moles of naoh. draw the structure(s) of the species of glycine present in the solution and indicate the proportion of each species.
the types of glycine present there in solution and the amount of each kind in the solution, and the pka of both the NH2 group, which ranges from 9 to 78, determines the solution's pH at 3. pH = equiv = 9.78, then.
What is the benefit of glycine?
A picture of glycine
The amino acid glycine has a host of remarkable health advantages. To produce crucial substances like glutathione, creatine, and collagen, your body needs glycine. Additionally, this amino acid may enhance heart health and sleep quality while defending your liver from alcohol-related harm.
Who should avoid glycine intake?
Avoid consuming excessive dosages of a single amino acid over an extended period of time. Avoid using single amino acids in excessive dosages without first consulting a healthcare professional. It is not advised for women to take glycine supplements when they are expecting or nursing.
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A student draws a distance verses time graph to describe the motion of a model train. What does a
horizontal section of the graph indicate about the motion of the train?
A student draws a distance verses time graph to describe the motion of a model train therefore the horizontal section of the graph indicates that the train is moving with uniform velocity with no acceleration because there is no change in velocity.
What is Uniform Velocity?This occurs when the average velocity between any two points along its path is the same in magnitude as well as direction.
If the velocity-time graph for the part of a journey is a horizontal line, then it simply means that the train is moving with uniform velocity with no acceleration because there is no change in velocity thereby making it the correct choice.
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Which of the following gases has the lowest average speed at 25 degree C? a. H2Se b. PH3 c. C2H6 d. F2
Since H2Se has the biggest molar mass of the gases, it has the lowest average velocity.
In chemistry, what does a molar mass mean?A substance's mass expressed in grams per mole is known as its molar mass. As seen in this video, the molar mass of a substance may be calculated by adding the molar masses of the material's component atoms.
Are the atomic and molar masses equivalent?Atomic mass is the mass of a single compound unit, whereas molecular mass refers to the mass of a single mole of a compound. In essence, atomic mass is the mass of the atom, while molar mass is the average mass of the compound's constituent parts.
Molar mass of H2Se = 78.98 + 2(1) = 80.98 g/mol
PH3 = 30.99758 + 3(1) = 33.99758 g/mol
C2H6 = 12(2)+6(1) = 30 g/mol
F2 = 37.997 g/mol
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What is the correct IUPAC name for the following compound? CH3 CH CH2C-CCH2CH (Compound Figure) A) 3-methyl-4-ethyl-3-hexen-6-ol B) 4-ethyl-3-methyl-3,6-hexenol C) 3-ethyl-4-methyl-3-hexen-1-ol D) 3-methyl-4-(2-hydroxyethyl)-3-hexene E) 3-(2-hydroxyethyl)- 3-methyl-3-hexene
The IUPAC name for the given compound is : 3-ethyl-4-methyl-3-hexen-1-ol
CH₃ - CH₂ - C = C - CH₂ - CH₃
| |
CH₃ CH₂CH₂OH
The given compound is :
CH₃ - CH₂ - C = C - CH₂ - CH₃
| |
CH₃ CH₂CH₂OH
The IUPAC name is 3-ethyl-4-methyl-3-hexen-1-ol.
The IUPAC name in the organic compound is the systematic approach for the naming of the organic compound. The IUPAC is the international union of the pure and the applied chemistry. There are some rule in the IUPAC to name the compounds. In the IUPAC on the naming of the compound the first rule is to find the longest chain of the carbon.
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PLEASE HELP ME WITH THIS QUESTION I NEED IT
The correct balanced equation for the reaction between zinc and dihydrogen sulfate is:
Zn + H₂S -> ZnS + H₂ (Option C)
How do I balance the equation?We can balance chemical equation by simply obeying the law of conservation of matter.
The law of conservation of matter which states that matter can neither be created nor destroyed during a chemical reaction but can be transferred from one form to another.
Now, we shall write the balance equation as shown below:
Zinc => Zn Dihydrogen sulfate => H₂SZinc + Dihydrogen sulfate ->
Zn + H₂S ->
Zinc displaces H to produce H₂ as shown below:
Zn + H₂S -> ZnS + H₂
Since the atoms of the elements on both sides of the equation are equal, then the equation is balanced
Thus, the correct answer is: Zn + H₂S -> ZnS + H₂ (Option C)
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a solution is prepared by dissolving 10.8 g of sodium sulfate (na2so4) in enough water to make 100.0 ml of solution. 10.00 ml of this solution is then added to 50.00 ml of water. calculate [na2so4] in each solution.
A solution by dissolving 10.8g of sodium sulphate (Na2SO4) in 100.0ml of water. Then add 10.00 ml of this solution to 50.00ml of water. The concentration of Na2SO4 is 0.012M (SO4)2- and 0.024M Na+.
Given the mass of sodium sulfate (na2so4) (m) = 10.8g = 10.8 x 10^-3kg
The volume of stock solution (V) =100ml = 0.1L
the extra volume added (V') = 10ml = 0.01L
The volume of water is (V'') = 50ml = 0.05L
We know that molarity = number of moles/volume of solution
Utilizing its molar mass, we should convert the provided mass of (Na2SO4) to moles.
10.8g 0f Na2SO4 x 1mol Na2SO4/142.04 = 0.076mol Na2SO4
Calculate the molarity of the solution by multiplying this amount by 100mL solution.
molarity = 0.076/0.1 = 0.76M
A total of 60mL of this solution is created by adding 10mL of it to 50mL of water. From dilution equation M1V1 = M2V2 to find the molality of 60mL solution.
(0.076) x (0.01) = M2 x (0.06)
M2 = 0.012M
This means that there are 0.012 moles of Na2SO4 per liter of solution. As it contains 2 Na+ and 1 (SO4)2- ions the concentrations of each ion is thus calculated as: 2 x 0.012 = 0.024M Na+ and 0.012M (SO4)2-.
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refers to the hydrocarbon that contains one or more double or triple bonds between two carbon atoms called
Alkynes have a carbon-carbon triple bond, whereas alkenes only have a carbon-carbon double bond. The generic molecular formula CnH2n identifies alkenes.
Alkenes have double bonds, right?Alkenes are hydrocarbons with double bonds between carbon atoms. When it comes to molecules with one double bond, their usual formula is CnH2n (and no rings). Following the initial moniker for ethene, olefiant gas, alkenes are also referred to as olefins.
What do GCSE alkenes cover?Because they are substances made up exclusively of hydrogen and carbon, alkenes are unsaturated hydrocarbons. They are unsaturated because they have two less hydrogen atoms than the comparable alkane due to the presence of a C=C double bond.
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how does the net ionic equation for a reaction involving a weak acid or a weak base differ from one that involves only strong acids and bases?
The net ionic equation for a reaction involving a weak acid or a weak base is different from one that involves only strong acids and bases because weak acids and bases do not fully dissociate in water.
What is the difference between weak and strong acids/base in an ionic equation?Only a small fraction of the weak acid or weak base molecules will actually participate in the reaction as ions. This is in contrast to strong acids and bases, which dissociate completely in water and will therefore be present as ions in the net ionic equation. The net ionic equation for a reaction involving a weak acid or a weak base will therefore include the weak acid or weak base in its molecular form, while the strong acid or strong base will be present as ions. Additionally, in the net ionic equation of a reaction involving a weak acid or weak base, the acid or base is often on both sides of the arrow, as a chemical species and as its conjugate acid or base.
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electron affinity tends to an. increase across a period and decrease down a group. b. decrease across a period and decrease down a group. c. decrease across a period and increase down a group. d. increase across a period and increase down a group.
Electron affinity increases going left to right across a period because of increased nuclear attraction.
What is the definition of electron affinity?The amount of energy released when an electron is added to a neutral atom to create a negatively charged ion is known as electron affinity in chemistry. Only a few chemical elements, mostly the halogens, have values for the electron affinities of their atoms since it is difficult to test these properties.
What increases electron affinities?The atom's nucleus becomes increasingly positively charged as the number of protons increases. The stronger the positive charge, the more the atom's nucleus and electrons are drawn together. As a result, the nucleus is able to hold the electrons more tightly, enhancing electron affinity.
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A sealed flask contains neon, argon, and krypton gas. if the total pressure in the flask is 3.782 atm, the partial pressure of ne is 0.435 atm, and the partial pressure of kr is 1.613 atm, what is the partial pressure of ar?
multiple choice question.
a)
Ar's partial pressure is 1.734 atm. if the gases neon, argon, and krypton are present in a sealed flask. If the flask's overall pressure is 3.782 atm, ne's partial pressure is 0.435 atm, and kr's partial pressure is 1.613 atm,
The partial pressure formula: what is it?One of two methods can be used to compute partial pressures: 1) Use PV = nRT to calculate the individual pressure of each gas in a mixture. 2)Determine the proportion of pressure from the total pressure that may be assigned to each individual gas by using the mole fraction of each gas.
Why is partial pressure significant, and what is it?Each gas in a mixture adds to the overall pressure of the mixture. This portion represents the pressure. The pressure a gas would have if it were in its own volume and at its own temperature is known as the partial pressure.
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there are five basic taste sensations: sweet, sour, bitter, salty, and umami. b. fluid is needed to help dissolve foods for tasting. c. they react only with particles in solution.
Only particles in solution react during taste perception, which is also influenced by scent, appearance, and temperature.
How do umami, bitter, and sweet taste cells get activated?
G protein-coupled proteins (GPCRs) from the T1R and T2R groups are activated on tasting receptor cells to release the bitter, umami, and sweet sensations that mammals detect.
What causes the perception of sweetness?
The brain's neurological pathways for interpreting and responding to sweet stimuli are activated when sweet endings in the mouth—which are involved in the experience of sweet taste—are stimulated with either nutritional sweeteners or LCS.
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Given the equation representing a system at equilibrium:AgCl(s)-><- H2O (on top of arrows) Ag ^+ (aq)+Cl^-(aq)When the concentration of Cl- (aq) is increased the concentration of Ag+ (aq)O Decreases, and the amount of AgCl(s) increasesO The ceoncentration of N2(g) is constantO The concentration of H2 (g) decreased and the concentration of NH3 (g) increasesO The equilibrium will shift ti the right and the concentration of NO2(g) will increase
Answer: The equilibrium will shift to the right and the concentration of Ag+ (aq) will decrease, and the amount of AgCl(s) will increase.
Explanation: In the equilibrium equation AgCl(s) <--> Ag^+(aq) + Cl^-(aq) represents a system where AgCl is in equilibrium with its dissociated ions Ag+ and Cl- in aqueous solution. The equilibrium is established by the forward and reverse reactions, AgCl(s) dissociating into Ag+(aq) and Cl-(aq) and Ag+(aq) and Cl-(aq) recombining to form AgCl(s).
When the concentration of Cl- (aq) is increased, the equilibrium system will shift to the right to consume some of the added Cl-. This is known as Le Chatelier's principle, which states that if a stress is applied to a system at equilibrium, the system will shift in the direction that will tend to relieve that stress. In this case, the added Cl- ions will react with the Ag+ ions to form more AgCl(s) and decrease the concentration of Ag+ ions.
It's important to note that the other options provided are not related to the reaction given and are not accurate.
a sample of an ideal gas at 1.00 atm1.00 atm and a volume of 1.69 l1.69 l was placed in a weighted balloon and dropped into the ocean. as the sample descended, the water pressure compressed the balloon and reduced its volume. when the pressure had increased to 50.0 atm,50.0 atm, what was the volume of the sample? assume that the temperature was held constant.
As the sample descended, a weighted balloon carrying an ideal gas sample with a capacity of 1.7 L and an atmospheric pressure of 1.00 atm was released.
At 0°C and 1 atm, what is the density of 60 ml of ideal gas?22.41 L/mol
At STP (Std Pressure and Temperature = 0 °A and, 1 atm), how big is one mole of a thermodynamic ,equilibrium? Therefore, at STP, an ideal gas has a volume of 22.41 L/mol. The least important and most widely remembered chemical number is 22.4 L.
What does Boyle's law say 1 atm is?760 mm Hg equals 1 atm. However, the Pascal is the accepted pressure measurement unit around the world. 1 atm Equals 101325 Pa. Robert Boyle, an English scientist, carried out.
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Use dimensional analysis, to calculate how many moles of nitrogen monoxide are produced if 13 moles of oxygen gas are reacted.
Number of moles of Nitrogen monoxide produced when 13 moles of of oxygen is reacted is 26 moles.
Dimensional analysis in chemical reaction means equating both sides of the equation and deriving relationships, so that we can calculate the required quantities.
Nitrogen and oxygen in the air, while events like lightening reacts together to form Nitrogen monoxide. The reaction is as follows.
N₂ + O₂ ------- NO
By equating the reaction we get
N₂ + O₂ ------- 2NO
1 mole of nitrogen reacts with one mole of oxygen to get 2 moles of Nitrogen monoxide.
So when 13 moles of oxygen reacts 2× 13 moles of Nitrogen monoxide is formed. That is 26 moles.
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With stoichiometry. Determine the mass of hydrochloric acid (HCI) that will react with 20.0 g of calcium carbonate (CaCO₃) to produce carbon dioxide, water and calcium chloride.
As per the given balanced reaction, 2 moles or 73 g of HCl reacts with one mole or 100 g of calcium carbonate. Then mass of HCl required to reacts with 20 g of calcium carbonate is 14.6 g.
What is calcium carbonate ?Calcium carbonate is an inorganic compound formed by passing carbon dioxide gas through quick lime or calcium hydroxide. It reacts with HCl to give calcium chloride.
molar mass of HCl = 36.5 g
mass of 2 moles = 36.5 × 2 = 73 g
molar mass of calcium carbonate = 100 g
100 g of calcium carbonate requires 73 g of HCl.
Mass of HCl required to completely react with 20 g of calcium carbonate is calculated as follows:
Mass of HCl = 20 × 73 /100 = 14.6 g
Therefore, mass of HCl required by 20 g of calcium carbonate is 14.6 g.
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what is characteristic of an aqueous solution of hno3? group of answer choices it conducts electricity. with the addition of phenolphthalein, it turns pink. it produces oh- in solution. it turns litmus blue.
Nitric acid (HNO3) is a colorless, fuming, and extremely corrosive liquid with freezing and boiling points of 42 and 181 degrees Celsius, respectively. that is a popular laboratory reagent and an important industrial.
HNO3 undergoes what kind of reaction?Neutralization is a chemical process that happens when an acid is put to a base. Nitric acid, HNO3, reacting with the basic potassium hydroxide, KOH, is one example.
Is HNO3 acidic when dissolved in water?Acids such as hydrochloric acid (H C l), nitric acid (H N O 3), and others exhibit an acidic nature as a result of their dissolution in aqueous solutions and generation of hydrogen ions. The acidic character of the compounds is caused by this hydrogen ion.
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Nitric acid (HNO3) has a freezing point of 42 degrees Celsius and a boiling point of 181 degrees Celsius. It is a whitish, fuming, and very corrosive liquid. It is a well-liked and crucial industrial reagent for laboratories.
What sort of reaction occurs with HNO3?When such an acid is added to a base, a chemical reaction called neutralization takes place. One example is the reaction of nitric acid (HNO3) and the basic potassium nitrate (KOH).
HNO3 dissolved in water is it acidic?Because they dissolve in aqueous phase and produce hydrogen ions, acids like hcl (H C l), potassium nitrate (H 4-hydroxy N 3), and many others have an acidic character. This hydrogen ion is what gives the compounds their acidic nature.
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FILL IN THE BLANK At 298 K and 1 atm, bromine is a liquid with a high vapor pressure, whereas chlorine is a gas. This provides evidence that, under these conditions, the forces among Br2 molecules are _______ than those among Cl2 molecules
Answer: stronger
Explanation: At higher temperatures, Br2 takes more energy to break apart the molecules. Therefore, the intermolecular forces, most likely london dispersion, will need more energy. Cl2 has weaker forces and takes less to break it apart.
if 1.38 grams of sodium phosphate were dissolved in 50 ml of water, how mahy mols of ions would there be in the solution
The solution would contain 0.0084 mols of ions if 1.38 grams of sodium phosphate were dissolved in 50 mL of water.
What is mole concept?In the International System of Units, the mole (symbol mol) is the unit of substance amount. The amount of substance is a measurement of how many elementary entities of a given substance are present in an object or sample. The mole is defined as having 6.022140761023 elementary entities. The mole concept is an easy way to express the amount of a substance. Any measurement is divided into two parts: the numerical magnitude and the units in which the magnitude is expressed. Due to the small size of atoms and molecules, the mole concept allows us to count atoms and molecules by weighing macroscopically small amounts of matter.
Here,
given mass=1.38 gram
molar mass,
=23*3+31*1+16*4
=69+31+64
=164 grams
moles=given mass/molar mass
=1.38/164
=0.0084 moles
If 1.38 grams of sodium phosphate were dissolved in 50 mL of water, the solution would contain 0.0084 mols of ions.
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what happnes to particles of water as the temperture of the sample of water approaches O K
Answer:
With an increase in temperature, the particles gain kinetic energy and vibrate faster and more strongly.a 0.185-g sample of the nickel salt was dissolved in 30.00 ml of 0.1013 n hcl. the excess hcl required 6.30 ml of 0.1262 n naoh to reach the end point. calculate the weight of the salt that contains one mole of nh3 (that is the equivalent weight of the salt)
The weight of the salt that includes one mole of NH3 is 82.44 g salt.
What is 1 moleThe International System for Units uses the mole (symbol: mol) as the unit of material quantity. How many basic entities of a particular substance are present in an item or specimen is determined by the quantity of that material.
The extra moles of HCl titrated with NaOH are first calculated. Normality and molarity is same for both NH3 and HCl.
So, 0.1262 N NaOH = 0.1262 M NaOH and 0.1013 N HCl = 0.1013 M HCl
6.30 mL x (1L/1000mL) x (0.1262 mol/L) x (1mol HCl/1mol NH3) = 0.000795 mol HCl
Now, we would calculate the total moles of HCl added to the sample.
30.00 mL x (1L/1000mL) x (0.1013 mol/L) = 0.003039 mol HCl
moles of HCl used to react with the sample of nickel salt = 0.003039 - 0.000795 = 0.002244 mol
From given equation, HCl is used to neutralize the ammonia present in the nickel salt and there is 1:1 mol ratio between them.
So, moles of NH3 present in the salt = 0.002244 mol
0.002244 moles of NH3 are present in 0.185 g of the sample. We need to calculate the grams of salt that would have 1 mol of NH3.
1 mol NH3 x (0.185 g salt/0.002244 mol NH3) = 82.44 g salt
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Sulphur burns in air to form sulphur dioxide: S+O2→SO2. What is the mass of sulphur that must be burned to produce 64g of sulphur dioxide?
It takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.
To calculate the mass of sulfur required to produce 64 g of sulfur dioxide, the following equation can be used:
m (sulfur) = (64 g SO2) / (32 g/mol SO2) × (1 mol S/ 32 g S) = 2 mol S
Therefore, the mass of sulfur required to produce 64 g of sulfur dioxide is 2 mol S or 64 g.
The mass of sulfur that must be burned to produce 64 g of sulfur dioxide is 64 g. This is because the molar mass of sulfur dioxide is 32 g/mol and the molar mass of sulfur is 32 g/mol.
Therefore, it takes 1 mol of sulfur to produce 1 mol of sulfur dioxide. Therefore, 64 g of sulfur is required to produce 64 g of sulfur dioxide.
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