Glaucoma Is a buildup of fluid within the eye.
The optic nerve, which is necessary for clear vision, is harmed by a group of eye conditions collectively referred to as glaucoma. This injury typically happens as a result of an excessively high amount of pressure in your eye. Glaucoma is one of the leading causes of blindness in persons over 60. Glaucoma frequently results from high intraocular pressure. Diabetes, however, can also increase your risk of developing glaucoma. We'll go into more detail about the connection between diabetes and glaucoma in this piece. We'll also talk about some preventative steps you may take to help keep your eyes healthy. Loss of side or peripheral vision: Often, this is the first glaucoma symptom.
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state and appearance sodium chloride
Sodium chloride is white, crystalline solid at room temperature.
Sodium chlorideIt is a compound whose components atoms are sodium and chlorine.
The atoms of the two elements combine chemically through an ionic bond. The sodium donates it valence electron to the chlorine atom.
Thus, sodium chloride is an ionic compound. It has a characteristic white appearance and crystalline structure.
The compound is a solid at room temperature. It has a melting point of 801 °C.
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Draw the major product formed in the reaction of an epoxide with methoxide in methanol.
the major product of the reaction is (2S,3R)-3-methoxy-3-methylpentan-2-ol.
Epoxy, epoxide, oxirane, and ethoxyline are all names for substances that contain the epoxide functional group. Oxides are a common name for simple epoxides. Consequently, ethylene oxide is the epoxide of ethylene (C2H4).
Reaction and explanation.
In order to answer this question, we must draw the main product and the studio chemistry. Yeah. Therefore, we will begin by drawing the reactant, which is an oxide.
As with this structure. Therefore, C. S. is applied to this epoxy side. Three ohs and two hash marks. As a result, the oxygen will be presented with the lone pair on the initial stage. And after that, we will receive the prototype for a thirty-plus-year-old product. And everything else will proceed as usual, even this.
Now this bond will be severed, and three miners from O. C. S. will attack from the back, in which case we will receive the finished product as seen here.
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(2S,3R)-3-methoxy-3-methylpentan-2-ol is the reaction's main product.
Epoxide functional group-containing compounds go by the names epoxy, epoxide, oxirane, and ethoxyline. Simple epoxides are frequently referred to as oxides. As a result, ethylene oxide is ethylene's epoxide (C2H4).Reaction and justification.We must illustrate the primary product and the studio chemistry in order to provide a response. As a result, we shall start by drawing the oxide reactant.similar to this structure C. S. is therefore applied to this epoxy side. Two hash marks and three OHs. As a result, on the initial stage, the oxygen will be presented with the sole pair. Then we will get the prototype for a product that has been around for more than thirty years. And even this will occur according to plan.This relationship will now be broken, and three O. C. S. miners will assault from behind, resulting in the finished article you see here.To learn more about epoxide visit:
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If a car travels 300 kilometers in 3 hours, its average speed is 100 km/hr.
true or false
Answer:
speed=distance/time taken
=300km/3hr
=100km/hr
So it is true.
please give brainlest and like
Potassium secretion is linked to:________.
a. sodium reabsorption
b. glucose reabsorption
c. sodium secretion
d. chloride reabsorption
e. chloride secretion
To a 25.00 mL volumetric flask, a lab technician adds a 0.225 g sample of a weak monoprotic acid, HA , and dilutes to the mark with distilled water. The technician then titrates this weak acid solution with 0.0849 M KOH . She reaches the endpoint after adding 42.35 mL of the KOH solution. Determine the number of moles of the weak acid in the solution.
The number of moles of the weak acid in the solution is 0.00359
Calculation:
1. The number of mole of KOH in the solution:
Given:
Molarity of KOH = 0.0849 M
Volume = 42.35 mL = 42.35 / 1000 = 0.04235 L
Mole of KOH = Mole = Molarity x Volume
= 0.0849 × 0.04235
= 0.00359 mole
2. The number of mole of a weak acid, HA:
Balanced equation:
HA + KOH → KA + H₂O
From the above equation, A mole of HA and a mole of KOH react together. Therefore,
0.00359 moles of HA will also react with 0.00359 moles of KOH.
0.00359 moles of base use = 1/1 x 0.00359 = 0.00359 moles of HA
Thus, there are 0.00359 moles of a weak acid in the solution.
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Place the items in order from lowest to highest degree of internal organization
The order of internal organization from lowest to highest degree is; cell < tissue < organ < organ system
What is the order of organization?The complexity of the parts that compose an organism lays the bedrock for the classification of life. Some organisms are composed only of one cell while others are composed of many complex systems.
The order of internal organization from lowest to highest degree is; cell < tissue < organ < organ system
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Missing parts:
Place the items in order from lowest to highest degree of internal organization.
1.organ system
2.tissue
3.cell
4.organ
Vinegar contains carbon, hydrogen, and oxygen with percent masses of 40.01% C, 6.70% H, and 53.29% O, respectively. Determine the empirical and molecular formulas of the compound. The molar mass of vinegar is about 60 g/mol. HOW DO WE GET THERE
The empirical formula is = C2H4O2
Molecular formula=C2H4O2
Calculation of Molecular formula and empirical formula:-Vinegar has three elements:
oxygen = 53.29%,
hydrogen = 6.70%,
and carbon = 40.01%.
We can create an equation for the total mass of vinegar with 'a' carbon atom,' b' hydrogen atom, and 'c' oxygen atoms using the molar masses of C, H, and O.
12*a + 1*b + 16*c = 60
We also know that C makes up 24 g/mol, or 40.01 percent, of the overall mass of 60 g/mol.
The formula contains two C atoms because each C atom has a molecular mass of 12 g/mol. You may determine that the formula contains 4 H and 2 O atoms by using the same reasoning for H and O.
The empirical formula is = C2H4O2
Molecular formula= (C2H4O2)n
(4 x 12 + 1 x 4 + 16 x 2)n = 60
(84)n = 60
n=60/84
n=0.71=1
Molecular formula=C2H4O2
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What is the best way to maintain control of the subsection when cutting with a vertical or diagonal cutting line
Palm to palm is referred to as the best way to maintain control of the subsection when cutting with a vertical or diagonal cutting line thereby preventing the risk of injuries or inaccuracy.
What is Palm to palm technique?This method is used during cutting or styling and involves the two palms of the hands in a position such that they are facing each other or opposite to one another and helps to reduce the different types of strain in the affected part of the body.
This method isn't a compulsory one to be done but is best suited for an individual who wants to maintain control of the subsection when cutting with a vertical or diagonal cutting line.
This is therefore the main reason why palm-to palm technique was chosen as the most appropriate choice.
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The elements of the group IA are termed as alkali metals, because their ___ are alkaline.
The answer is hydroxides.
The elements of the group IA are termed as alkali metals, because their hydroxides are alkaline.
please help me with this questio
The mass of the precipitate is 8.74 g and the concentration of the calcium nitrate is 0.061 M.
What mass of precipitate is formed?The reaction is given by; 2AgNO3(aq) + CaCl2 (aq) ------>2AgCl(s) + Ca(NO3)2(aq)
Number of moles of AgNO3 = 195/1000 * 0.500 = 0.0975 moles
Number of moles of CaCl2 = 305/1000 * 0.100 = 0.0305 moles
If 2 moles of AgNO3 reacts with 1 mole of CaCl2
0.0975 moles reacts with 0.0975 moles * 1 mole / 2 moles = 0.04875 moles
Thus CaCl2 is the limiting reactant.
1 mole of CaCl2 produces 2moles of AgCl
0.0305 moles produces 0.0305 moles * 2 moles/ 1mole
= 0.061 moles
Mass of precipitate = 0.061 moles * 143.32 g/mol
= 8.74 g
Now 1 mole of CaCl2 produces 1 mole of Ca(NO3)2
Total volume of solution = 195 ml + 305 ml = 500 ml or 0.5 L
Concentration of Ca(NO3)2 = 0.0305 moles/ 0.5 L
= 0.061 M
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(a) List any four properties of colloidal and mention any two properties in which colloids differ from suspension. (b) State what is Tyndall effect? Which of the following solution will show Tyndall effect? Starch solution, sodium chloride solution, tincture iodine, air, milk
Explanation:
(1) they are heterogenous mixture
(2) the size of particles of colloids is too small to be seen by bare eyes.
(3) they scatter light passing through them making it's path visible.
Pls Help!
A sample of seawater from a tidal estuary was found to contain a concentration of 727 mg of chloride ion per kg of seawater. If the density of the sample was 1.035 g/mL, what is the molarity of the chloride ion?
The molarity of the chloride ion is 2.0 * 10⁻⁵ M.
What is the molarity of the chloride ion?The molarity of the chloride ion is calculated using the formula below:
Molarity = (Percentage concentration * Density ) / (Molar mass * 100)The percentage concentration of chloride ion = 727/kg * 10⁻⁶ Kg * 100/1
The percentage concentration of chloride ion = 0.0727%
Molar mass of Chloride ion = 35.5 g/mol
Molarity = (0.0727 * 1.035)/(35.5 * 100)
Molarity of chloride ion = 2.0 * 10⁻⁵ M
In conclusion, the molarity of the chloride ion is obtained from the density and percent concentration of chloride ions in seawater.
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? Question
The article mentions that the difference in the responses of men and women to the research study could be due to
confirmation bias. Use the Internet to look up "confirmation bias." Which of the following statements could support the
view that the difference is due to confirmation bias?
Select all the correct answers.
Many of the men may believe that they are fair and unbiased against women.
Many of the women may already believe that they face biases.
More men than women participated in the study.
The men who participated in the study were younger than the women.
Many of the men may believe that they are fair and unbiased against women.
Many of the women may already believe that they face biases.
What is confirmation bias ?
The propensity to seek for, understand, favor, and remember information that supports or confirms one's preexisting opinions or values is known as confirmation bias. People exhibit this bias when they choose facts that support their opinions while rejecting those that contradict them or when they interpret ambiguous facts as supporting their preexisting beliefs. Although confirmation bias cannot be completely avoided, it can be controlled, for instance, by critical thinking education and training.
Confirmation bias has been linked to poor decisions in the scientific, organizational, financial, and political spheres. These biases can preserve or reinforce views in the face of contradictory data and contribute to overconfidence in personal opinions.
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Answer:
Many of the men may believe that they are fair and unbiased against women.
Many of the women may already believe that they face biases.
Explanation:
Carbon dioxide and water are produced when ethanol, C2H5OH, is burned in oxygen. The number of moles of CO2 that is produced when burning 6.0 mol of ethanol is
The number of moles of CO₂ that is produced when burning 6.0 mol of ethanol is 12 mol.
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now we have to write the balanced equation
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
We can see that every 1 mole of ethanol we will get 2 mole of CO₂.
So 6.0 mol of ethanol we will get = 6.0 × 2.0
= 12 mol of CO₂
Thus from the above conclusion we can say that The number of moles of CO₂ that is produced when burning 6.0 mol of ethanol is 12 mol.
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A balloon filled with air has a volume of 4.24 liters at 23.00°c. if the balloon is cooled at constant pressure to 5.00°c, what is its new volume? the balloon’s volume at 5°c is liters.
The new volume if the balloon is cooled at constant pressure is 3.98 L.
Charles's law, states that the volume occupied by a fixed amount of gas is directly proportional to its absolute temperature if the pressure remains constant.
The new volume is calculated using the Charles law formula
V₁ / T₁ = V₂ / T₂
where,
V₁ = The initial volume of air = 4.24 l
T₁ = 23.00 °C into kelvin = 23 +273 =296 K
T₂ = 5.00 °C into kelvin = 5.00 + 273 = 278 K
V₂ = ?
By making V₂ subject the subject of the formula by multiplying both sides by T₂
V₂ = ( V₁ × T₂ ) / T₁
V₂ = (4.24 L × 278 K) / 296 k
= 3.98 L
Therefore, the new volume, if the balloon is cooled at constant pressure, is 3.98 L.
An air-filled balloon will contract when chilled and expand when heated. This occurs because the gas that makes up the air within the balloon expands when it is warm and contracts when it is cool.
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Answer: at 5 its ... 3.98
Explanation:
Elements on the periodic table are arranged in order by their
Answer:
in order of increasing atomic number, or the number of protons in an atom's nucleus, which generally coincides with increasing atomic mass
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At a particular temperature, the solubility of Kr in water is 0.060 M when the partial pressure is 0.90 atm. What partial pressure (in atm) of Kr would give a solubility of 0.150 M
At a particular temperature, the solubility of He in water is 0.060 M when the partial pressure is 0.90 atm. 2.27 atm is the partial pressure of Kr would give a solubility of 0.150 M.
What is Henry's Law ?According to Henry's law, the weight of a gas dissolved by a liquid is proportional to the pressure of the gas onto the liquid.With very few exceptions, a solute molecule in an extremely diluted solution will only have solvent molecules as its close neighbors. This means that the likelihood that a specific solute molecule will escape into the gas phase is predicted to be independent of the total concentration of solute molecules.Solution:
The solubility of gas is directly proportional to partial pressure. It is expressed as:
S = [tex]K_ h \times P _g_a_s[/tex]
where, S = Solubility of gas
[tex]K_h[/tex] = Henry's Law constant
[tex]P_g_a_s[/tex] = Partial pressure of gas
Now, put the values in above expression we get
0.060M = [tex]K_h[/tex] × 0.9 atm
[tex]K_h[/tex] = = 0.066 M/atm
Now we have to find the partial pressure of He
0.150 M = 0.066 M/atm × [tex]P_g_a_s[/tex]
[tex]P_g_a_s[/tex] = 2.27 atm
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A positive correlation ______ a causal link, and a negative correlation ______ a causal link.
A. does not necessarily indicate, does not necessarily indicate
B. does not necessarily indicate, always indicates
C. always indicates, does not necessarily indicate
D. always indicates, always indicates
A positive correlation does not necessarily indicate a causal link, and a negative correlation does not necessarily indicate a causal link. Option A
What is correlation?In research, correlation often indicates that some kind of relationship does exist between the variables. This does not actually mean causation. The correlation could be positive or negative.
It should be known that; a positive correlation does not necessarily indicate a causal link, and a negative correlation does not necessarily indicate a causal link. Option A
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_____ was the first expert system developed to determine the chemical structure of molecules.
Answer:
Dendral was the first expert system developed to determine the chemical structure of molecules.
What type of cleaning agent should be used to clean a laminar flow hood?
a. 70% Isopropyl Alcohol.
b. 90% Ethyl Propyl alcohol.
c. 90% Isopropyl Alcohol.
d. 50% Ethyl Propyl alcohol.
The type of cleaning agent that should be used to clean a laminar flow hood is 70% Isopropyl Alcohol.
Isopropyl alcohol is mixed with water for use as a rubbing-alcohol antiseptic. It is also utilized in aftershave creams, hand lotions, and other cosmetics. In enterprise, it is used as a less expensive solvent for cosmetics, drugs, shellacs, and gums, in addition to denaturing ethanol (ethyl alcohol).
Isopropyl alcohol is a colorless, flammable chemical compound with a robust alcoholic smell. As an isopropyl institution related to a hydroxyl group, it's far the handiest example of a secondary alcohol, wherein the alcohol carbon atom is connected to 2 other carbon atoms.
Isopropyl alcohol is pure alcohol and is a colorless liquid with a musty, sharp odor. There are no other components in a bottle of isopropyl alcohol. through assessment, rubbing alcohol consists of isopropyl alcohol among different components, including water. maximum rubbing alcohol manufacturers incorporate 70% isopropyl alcohol.
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Which models of the atom from task 1 are not supported by rutherfords experimental evidence?
Model not supported is:
Thomson's atomic model of the atom from task 1 are not supported by Rutherford's experimental evidence.
Experiments given by Thomson, Rutherford & Dalton:
The cathode ray tube experiments of J.J. Thomson demonstrated that all atoms contain minute, electron-like subatomic particles that are negatively charged.The plum pudding model of the atom was put up by Thomson and featured negatively charged electrons embedded within a positively charged "soup."The majority of an atom is empty space, with a small, dense, positively-charged nucleus, as demonstrated by Rutherford's gold foil experiment.Rutherford postulated the nuclear model of the atom in light of these findings.Atoms, in Dalton's opinion, are the tiniest pieces of matter that can never be further divided. This belief persisted up until the time it was learned that the atom was made up of subatomic particles.Dalton and Thomson's concepts are in conflict with the experimental findings of Rutherford. Dalton's model is unsupported by evidence because it does not include electrons, protons, or neutrons.
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Which answer best describes what is happening in the following reaction?
2C8H18 + 25O2 Right arrow. 16CO2 + 18H2O
This is not a redox reaction. It is an example of combustion.
This is a redox reaction in which octane (C8H18) is the reducing agent.
This is a redox reaction in which carbon dioxide (CO2) burns due to ignition.
This is not a redox reaction, because a solution of carbon dioxide and water results.
A. This is not a redox reaction. It is an example of combustion.
Combustion reaction of hydrocarbonDuring the combustion of a hydrocarbon, the hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.
Example of combustion reaction2C8H18 + 25O2 → 16CO2 + 18H2O
Thus, we can conclude that, this is not a redox reaction. It is an example of combustion.
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Answer:
A: This is not a redox reaction. It is an example of combustion.
Explanation:
When enzyme activity rate has reached stability, an increase in the enzyme concentration will.
When enzyme activity rate has reached stability, an increase in the enzyme concentration will not make any difference in the enzyme rate.
What is an enzyme?Enzyme are proteins that act as biological catalysts.
How is enzyme activity measured?Enzyme activity is measured in micromoles of substrate converted (or product generated) per minute, which represents the rate of reaction catalyzed by that enzyme.
The activity an enzyme catalyzes in a reaction is a measure of how much of it is present. Numerous variables, including temperature, pH, and others, have an impact on the connection between activity and concentration.Every time an enzyme's concentration rises, so does its activity. This is as a result of the availability of additional enzymes to bind to the substrate. The reaction time quickens as a result. Increasing the concentration of the enzyme will quicken the reaction as long as there is a substrate for it to bind to.To learn more about enzyme activity visit:
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When enzyme activity rate has reached stability, an increase in the enzyme concentration will not make any difference in the enzyme rate.
What is an enzyme?
Enzymes are proteins that act as biological catalysts.
How is enzyme activity measured?Enzyme activity is measured in micromoles of substrate converted (or product generated) per minute, which represents the rate of reaction catalyzed by that enzyme.
The activity an enzyme catalyzes in a reaction is a measure of how much of it is present.Numerous variables, including temperature, pH, and others, have an impact on the connection between activity and concentration.Every time an enzyme's concentration rises, so does its activity.This is as a result of the availability of additional enzymes to bind to the substrate.The reaction time quickens as a result.Increasing the concentration of the enzyme will quicken the reaction as long as there is a substrate for it to bind to.To learn more about enzyme activity visit:
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Read the chemical equation.
n2 + 3h2
2nh3
using the volume ratio, determine how many liters of nh3 is produced if 3.6 liters of
h2 reacts with an excess of n2, if all measurements are taken at the same
temperature and pressure? (5 points)
1) 5.4 liters
2) 2.4 liters
3) 1.8 liters
4) 1.2 liters
The volume of [tex]NH_3[/tex] that will be produced is 2.4 liters. The correct option is 2.
Volume ratioThe equation of the reaction goes thus: [tex]N_2 + 3H_2 --- > 2NH_3[/tex]
The ratio of H2 to NH3 is 3:2.
Thus, with 3.6 L of H2, the volume of NH3 that will be produced is:
2/3 x 3.6 = 2.4 liters.
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A saturated solution of baso4 has a concentration of 0.5mol/l. a 55ml sample is taken by you. what is the mass of baso4 in the solution
Answer:
6.4 g BaSO₄
Explanation:
You have been given the molarity and the volume of the solution. To find the mass of the solution, you need to (1) find the moles BaSO₄ (via the molarity ratio) and then (2) convert moles BaSO₄ to grams BaSO₄ (via the molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 2 sig figs to reflect the sig figs of the given values.
Molarity (mol/L) = moles / volume (L)
(Step 1)
55 mL / 1,000 = 0.055 L
Molarity = moles / volume <----- Molarity ratio
0.5 (mol/L) = moles / 0.055 L <----- Insert values
0.0275 = moles <----- Multiply both sides by 0.055
(Step 2)
Molar Mass (BaSO₄): 137.33 g/mol + 32.065 g/mol + 4(15.998 g/mol)
Molar Mass (BaSO₄): 233.387 g/mol
0.0275 moles BaSO₄ 233.387 g
--------------------------------- x ------------------- = 6.4 g BaSO₄
1 mole
how many moles are in 2.00g of H2O
n = m/M = 2/18 = 1/9 ~0,1 mol
Answer:
.111 mole (using 3 significant digits)
Explanation:
Mole weight of H2O = 2 x 1.008 + 15.999 = 18.015 gm/mole
2 gm / 18.015 gm/mole = .111 mole
Explain why the production of a gas in this experiment is or is not different from the formation of water vapor in the heating curve experiment.
The production of a gas is different because unlike the heating curve, there was no heat applied to this experiment, and the experiment was a chemical reaction.
What is a Heating curve?This shows the relationship between the temperature of the heating system and the air temperature in the outer environment.
The chemical reaction emitted heat as against the other which involved heat application which is why water formation in this curve was different.
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At the stoichiometric (equivalence) point in a titration of benzoic acid with naoh(aq) shown by equation 3, the ph is:_______
Benzoic acid is one of the weakest acid for titration. The pH of the salt solution generated is the pH greater than 7( >7 ) at the equivalence point in any titration.
The benzoate anion, combines with water to create OH- and undissociated benzoic acid. This reaction is stronger than OH-. As a result of the hydroxide ions generated by this reaction, the final solution has a pH greater than 7. Hydrolysis is the term for an ion's reaction with water, such as the benzoate ion.
What is titration?A titration is a method for figuring out the concentration of an unknown solution by using a solution with known concentration.Until the reaction is finished, the titrant (the known solution) is typically added from a buret to a known volume of the analyte (the unknown solution).The concentration of the unknown can be determined by knowing the amount of titrant that was added. An indicator is frequently used to indicate the reaction's endpoint or end of the reaction.Know more about titration numerical https://brainly.com/question/14501686
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26.10 mL of a 0.250 M potassium carbonate solution is reacted with excess hydroiodic acid. How many grams of gas formed are in the balanced equation
Answer:
Below in bold.
Explanation:
The equation is:
K2CO3 + 2HCl ----> 2KCl + CO2 + H2O
So 1 mole of K2CO3 produces 1 mole of CO2.
Number of moles of K2CO3 in the solution
= 0.25 * 26.10 / 1000
= 0.00625 moles
This produces 0.00625 moles of CO2
which is 0.00625*44
= 0.2871 grams.
How many moles of hcl are required to make 500 ml of a 3.0 mol/l solution of hcl?
Answer:
1.5 moles
Explanation:
To find the number of moles of HCl in 500 mL of a 3 M solution of HCl, we consider moles in 1 liter/ 1000 mL.
3 moles HCl is contained in 1000 mL
x moles is HCl is contained in 500 mL
[tex] = \frac{3 \: \times \: 500}{1000} \: moles \\ = 1.5 \: moles[/tex]
Hence the number of moles of HCl in 500 mL is 1.5 moles.