Answers
The first thing will be to finish the reaction that happens in the experiment to the reactional HCl and sodium bicarbonate (NaHCO3). The balanced reaction is the following:
\(NaH_{}CO_3+HCl\rightarrow NaCl+H_2O+CO_{2(g)}\)Now, we must determine which is the limiting reactant. To do this we are going to convert all the data they give us to moles.
For HCl we are given the molarity, so the moles will be:
\(\begin{gathered} \text{Molarity}=\text{ }\frac{\text{Moles of solute}}{L\text{ of solution}} \\ \text{Moles of solute= Molarity}\times L\text{ of solution} \\ \text{Moles of solute=}0.5M\times(25mL\times\frac{1L}{1000mL}) \\ \text{Moles of solute=}0.0125\text{ mol HCl} \end{gathered}\)Now the moles of sodium bicarbonate are found using its molar mass:
\(\begin{gathered} \text{Moles }NaHCO3=\text{Given g }NaHCO3\times\frac{1molNaHCO3}{Molar\text{ mass, g}NaHCO3} \\ \text{Moles }NaHCO3=7.4g\times\frac{1moNaHCO3}{84.007gNaHCO3} \\ \text{Moles }NaHCO3=0.0880\text{mol }NaHCO3 \end{gathered}\)By stoichiometry, we have that one mole of NaHCO3 reacts with one mole of HCl. We have more moles of NaHCO3 than HCl. Therefore, HCl will be the limiting reactant.
So the reaction will occur according to the number of moles of HCl. Now the ratio between HCl and CO2 gas formed is 1 to 1. For one mole of HCl that reacts, 1 mole of CO2 will be formed.
so, the number
Related Questions
Which of the ions Pd2+ , Ru2+ , Rh3+, and Hg2+ has an electron configuration of nd6 (n=3,4,5,…) ?
Answers
The ion with an electron configuration of nd6 is Pd²+.
The electron configuration of an atom or ion is the dispersion of electrons in its orbitals. It describes how electrons are grouped in an atom's or ion's many energy levels and sublevels.
The number of electrons in each energy level and sublevel is often shown in shorthand notation in the electron configuration. Carbon's electron configuration, for example, can be represented as:
1s² 2s² 2p²
This means that carbon has a total of 6 electrons, with 2 in the 1s orbital, 2 in the 2s orbital, and 2 in the 2p orbital.
An ion's electron configuration may differ from that of its parent atom due to electron loss or gain.
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Determine the number of atoms of O in 7.23 moles of Ca(NO3)2.
Answers
Answer: 43.38 number of atoms
Explanation: If you look at this formula, then this one molecule contains six oxygen atoms. That means number of moles of oxygen atoms. That is six times the number of moles and of calcium nitrate, That is six, multiply 7.23, which comes out to be 43.38 moles of oxygen atom.
Which is regarding enzyme inhbition
Answers
Explanation:
An enzyme inhibitor is a molecule that binds to an enzyme and decreases its activity. ... Since blocking an enzyme's activity can kill a pathogen or correct a metabolic imbalance, many drugs are enzyme inhibitors. They are also used in pesticides.
A liquid ester used to flavour food is believed to be impure. What would be the best way of testing its purity?
Answers
Answer:
Filter it
Explanation:
Chemistry Lab Determination of the Universal Gas Constant (R)
SHOW ALL WORK
Given:
Initial mass of butane lighter: 54.24g
Final Mass of Butane Lighter: 54.01g
Temperature of water: 23.0°C
Volume of gas collected: 100.0mL
FIND:
Barometric pressure of room: 766.86 mmHg CONVERTED TO atm
Vapor pressure of water at room temperature(PH2O) (IN atm)
FIND:
Mass difference if butane lighter in grams
Moles of Butane gas collected in moles of C4H10
Partial pressure if butane gas in atm
Converted temperature of water in Kelvin
Converted volume of gas collected in Liters
Experimental value of R in Latm/molk
Accepted value of R in Latm/molk
Percent error in experimental value of R in %
CONCLUSION QUESTIONS:
1. List at least 3 factors that either did it could contribute to the percent error
2. Should the value of R go up or down if the gas had not been corrected for the partial pressure of water. Why?
3. How could this experiment be repeated to increase the accuracy, or in other words, decrease the percent error?
NOTE: LET ME KNOW IF YOU WANT A PICTURE OF THE LAB INSTRUCTIONS TO HELP SOLVE
ALSO SHOW ALL WORK PLS
Answers
To solve this problem, I'll need some additional information related to the molar mass of butane (C4H10). Please provide the molar mass of butane so that I can proceed with the calculations.
A solution containing 3.39 mM X (analyte) and 1.72 mM S (internal standard) gave peak areas of 3497 and 9997, respectively, in a chromatographic analysis. Then 1.00 mL of 8.47 mM S was added to 5.00 mL of unknown X, and the mixture was diluted to 10.0 mL. This solution gave peak areas of 5428 and 4431 for X and S, respectively.
a. Calculate the response factor for the analyte. (keep four significant figures)
b. Find the concentration (mM) of X in the original unknown
c. Find the concentration (mM) of X in the 10.0 mL of mixed solution.
Answers
Answer:
a. Response factor is 0.1775
b. 11.7mM of X in the original unknown
c. 5.85mM is the concentration of X in the diluted solution
Explanation:
a. The equation to find response factor is:
F = AreaX*[S] / AreaS*[X]
Where Area of X our sample and S the internal standard whereas [] represent the concentration of each one.
Replacing:
F = 3497*1.72mM / 9997*3.39mM
F = 0.1775
c. The concentration of S is:
8.47mM * 1.00mL / 10.0mL = 0.847mM
Replacing:
0.1775 = 5428*0.847mM / 4431*[X]
[X] = 5.85mM is the concentration of X in the diluted solution
b. The concentration of X in the original unknown is:
5.85mM * (10.0mL / 5.00mL) =
11.7mM of X in the original unknown
Which amphibian organ has a high blood supply and many folds to increase surface area?
a. heart
b. stomach
c. lungs
d. brain
Answers
Answer:
lungs
Explanation:
Why does the atom get more reactive if the nucleus is far away from the outer electron.
Answers
Answer: The size of an atom is generally considered as the distance between the outer shell electrons and the nucleus, i.e., the atom's radius. The larger the atomic radius, the lesser the reactivity of an element. It is because when the electrons are away from the nucleus, there is less electron density on the atom.
which change of phase is exothermic
Answers
Fusion, vaporization, and sublimation are endothermic processes, whereas freezing,condensation, and deposition are exothermic processes.
Which two bonds are most similar in polarity? Which two bonds are most similar in polarity? O-F and Cl-F B-F and Cl-F I-Br and Si-Cl Al-Cl and I-Br C-Cl and Be-Cl
Answers
Answer:
A
Explanation:
gyx3gevedyhsdv
The branch of science which deals with chemicals and bonds is called chemistry.
The correct answer is A.
The polarity is defined as the separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end.
The polar molecule has the following:-
Difference in electronegativity.In, the first compound the polarity is the same because the compound is the same that is O-F and CL-F.
Hence, the correct answer is A.
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Answers
Answer:
C.
Explanation:
They will need to know the influence of gravitational force on objects because gravity can affect an objects weight.
A vessel contains 2.00 mol of He, 4.50 mol of Kr, and 0.50 mol of N2 gases. If the partial pressure of He is 0.120 atm, what is the total pressure inside the vessel?
Answers
Considering the Dalton's partial pressure, the total pressure inside the vessel is 0.42 atm.
Dalton's partial pressureDalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
\(P_{T}\)= P₁ + P₂ + ... + Pₙ
where n is the amount of gases present in the mixture.
This relationship is due to the assumption that there are no attractive forces between the gases.
Dalton's partial pressure law can also be expressed in terms of the mole fraction of the gas in the mixture. So in a mixture of two or more gases, the partial pressure of gas A can be expressed as:
\(P_{A}\)=\(x_{A}\)\(P_{T}\)
Total pressure inside the vesselIn this case, you know:
Amount of moles of He= 2 molesAmount of moles of Kr= 4.50 molesAmount of moles of N₂= 0.50 molesTotal amount of moles= Amount of moles of He + Amount of moles of Kr + Amount of moles of N₂= 2 moles + 4.50 moles + 0.50 moles= 7 molesPartial pressure of He= 0.120 atmThe partial pressure of gas He can be expressed as:
\(P_{He}\)=\(x_{He}\)\(P_{T}\)
Then, calculate the mole fraction of He as:
\(x_{He}\)= Amount of moles of He÷ Total amount of moles
\(x_{He}\)= 2 moles÷ 7 moles
\(x_{He}\)= 2/7
the total pressure can be calculated as:
0.120 atm= 2/7×\(P_{T}\)
0.120 atm÷ 2/7=\(P_{T}\)
0.42 atm= \(P_{T}\)
Finally, the total pressure is 0.42 atm.
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given the following hypothetical reaction 2E(g)+ F(g)+O(g)_products.if the rate law is rate _K(e)^2(f)^-1,what is the order of the reaction with respect to water?
Answers
Answer:
See explanation.
Explanation:
Hello there!
In this case, considering the given information, it is not possible to figure out such order of reaction with respect to water as it is not involved in the given chemical reaction:
2E(g)+ F(g)+O(g)_
However, we can say that the order of reaction is 2 with respect to E (power of 2 in the rate law), 1 with respect to F (power of 1 in the rate law) and 0 with respect to O (power of 0 or not present in the rate law).
Regards!
In which way do buffalos protect themselves from predator animals such as lions
Answers
Answer: Both males and females have sharp, curved horns extending from the sides of their heads which are used to defend themselves against predators.
Explanation:
A gas has a volume of 50.0 mL at a temperature of 10.0 K and a pressure of 760. kPa. What will be the new volume when the temperature is changed to 20.0 K and the pressure is changed to 380. kPa?
Answers
To solve this problem using the gas laws, we need to use the Ideal Gas Law. This law states that the product of the pressure and the volume of a gas is proportional to the absolute temperature.
The equation of the Ideal Gas Law is the following:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{\dfrac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} } \end{gathered}$} }\)
Where:
P₁ = initial pressure = 760 kPaV₁ = initial volume = 50.0 mL = 0.050 LT₁ = initial temperature = 10.0 KP₂ = Final pressure = 380 kPaT₂ = final temperature = 20.0 KV₂ = Final volume = ?We clear for V₂:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{P_1V_1T_2}{P_2T_1 } } \end{gathered}$} }\)
Where:
P₁ = initial pressure V₁ = initial volumeT₁ = initial temperatureP₂ = Final pressureT₂ = final temperatureV₂ = Final volumeSubstituting the known values:
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760\not{kPa}\times0.050 \ L\times20.0\not{k} }{ 380\not{kPa}\times10.0\not{k} } } \end{gathered}$} }\)
\(\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2=\frac{760 \ L}{3800 } } \end{gathered}$} }\)
\(\boxed{\boxed{\large\displaystyle\text{$\begin{gathered}\sf \bf{V_2\approx0.2 \ Liters} \end{gathered}$} }}\)
When the temperature changes to 20.0 K and the pressure changes to 380 kPa, the new volume will be approximately 0.2 L (200.0 mL).What situational irony occurs in “The Colomber” by Dino Buzzati?
Stefano kills the colomber and ends the curse of the colomber forever.
The colomber reveals a secret ability to walk on land.
Stefano’s father was the real victim of the colomber.
The colomber pursues Stefano in order to give him a magic pearl.
Answers
The colomber pursues Stefano in order to give him a magic pearl. Hence, the option D is correct.
What is situational irony?Situational irony is the irony of something happening that is very different to what was expected.
In the Colomber there is a situational irony and is that it was tasked to give Stefano a pearl that will give him good luck and success in life.
It is ironic that It was believed that the Colomber was a harbinger of death and that whoever sees it will be doomed for life.
The colomber pursues Stefano in order to give him a magic pearl. Hence, the option D is correct.
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3
(2 Points)
How many moles of CO2 is 6.9x1030 particles of CO2?
A. 1.1x10’moles
B. 1.1x10 moles
C.1.3x103 moles
D. 1.3x10’moles
Answers
Answer:
Explanation:
B
One beaker contains pure water and the other beaker contains pure methanol at the same temperature. Which liquid has the higher surface tension and viscosity?
A. Water has the higher surface tension.
B. Methanol has the higher surface tension.
C. Surface tension cannot be predicted.
D. Water has the higher viscosity.
E. Methanol has the higher viscosity.
F. Viscosity cannot be predicted.
Answers
Answer:
Water has both the higher surface tension and viscosity
Explanation:
Water has stronger intermolecular forces
Water has a higher viscosity and surface tension than methanol.
Water has a high melting and boiling point irrespective of its low relative molecular mass because of strong intermolecular hydrogen bonding in the liquid.
This strong intermolecular hydrogen bonding also accounts for its high viscosity and surface tension. Surface tension is a force acting along the surface of a liquid that makes it behave like a stretched elastic skin.
Methanol has a lesser magnitude of intermolecular hydrogen bonding compared to water hence it has less surface tension and viscosity compared to water.
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What is Sr(NO3)2 + ZN ?
Answers
Answer:
strontium nitrate
Explanation:
hope this helps you....:)
Reduction occurs at the cathode in
1.
electrolytic cells, onlysing
2.
voltaic cells, only
3.
both electrolytic cells and voltaic cells
4.
neither electrolytic cells nor voltaic cells
Answers
Answer: 3
Explanation:
3) both electrolytic cells and voltaic cells
The statement, that describes reduction occurs at the cathode is "both electrolytic cells and voltaic cells."
What is a reduction?The gain of electrons is referred to as reduction. The species that is being oxidised is also known as the reducing agent or reductant, whereas the species that is being reduced is known as the oxidising agent or oxidant.
Reduction takes place at the cathode electrode whereas oxidation occurs at the anode in both galvanic and electrolytic cells, and electrons travel from the anode to the cathode.
Electrons must move toward the location of reduction since reduction is the addition of electrons. The negative charge is on the cathode of an electrolytic cell, while the positive charge is on the anode.
Hence, the correct answer is 3.
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The speed of a car is 32.0 miles/hr . What is it's speed in m/s ? ( given 1 mile = 1609m )
Answers
Answer:14.3 m/s
Explanation:
32 x 1609 = 51488
51488 / 60 / 60 = 14.3
(60 minutes and 60 seconds so you can get unit of 1 second)
Most genetic mutations are repaired by____
a. ATP
b. Digestive juices
c. Insulin
d. Enzymes
Answers
what is sulphur mnq///oxqh///pvr joīń
Answers
Explanation:
It found a small but statistically significant association between reduced health care spending and increased death rates among children less than a year old, specifically that a10% reduction in health care spending led to an increase in infant mortality of 0.5% for boys and 0.4% for girls.
Becca is a forensic technician analyzing the fragments of a window. She sees that there is a hole in the window, and that the outside hole is smaller than the inside hole. What might she deduce from this information?
Answers
The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:
The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.
The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.
The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.
Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
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How many liters of hydrogen gas are required to react with 3.5" liters of oxygen gas in the following reaction? 2H2(g)+O2(g) -->2H2O(g)
Answers
Answer:
7 L of H₂.
Explanation:
The balanced equation for the reaction is given below:
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
1 L of O₂ required 2 L of H₂.
Finally, we shall determine the volume of H₂ required to react with 3.5 L of O₂. This can be obtained as follow:
From the balanced equation above,
1 L of O₂ required 2 L of H₂.
Therefore, 3.5 L of O₂ will require
= 3.5 × 2 = 7 L of H₂.
Thus, 7 L of H₂ is required to for the reaction.
Which of the following molecules has a trigonal planar shape?
Answers
Answer:
B
Explanation:
The geometry of the BF3 molecule is called trigonal planar
Answer:
bf3 is a trigonal shape
Explanation:
no.of pairs = v+m-c+a/2
then it ' ll get 3
so sp2 hybridization
sp2 is a trigonal planar
PLEASE HELP ME NO ONE WILL THIS IS IMPORTANT ALOT OF POINTS! A student's favorite drink is sweet tea. Every morning he makes it by adding exactly thirty grams of sugar and one tea bag to one liter of hot water. Some days his tea does not taste as sweet as other days. Those same days he notices that there is sugar sitting at the bottom of the cup that will not dissolve no matter how long he stirs. He decided to filter out the remaining sugar and keep track of the data in the graph below.
Explain why different amounts of sugar might dissolve at different times.
Consider:
1. which day the least sugar dissolved and which day the most sugar dissolved.
2. what could have caused less sugar to dissolve on some days
3. what the student could do to his drink to make more sugar dissolve.
Be sure to consider the completeness of your response, supporting details, and accurate use of terms. Your response should be 6-8 complete sentences.
Answers
The solubility of a substance, such as sugar, depends on several factors, including temperature, pressure, and the presence of other solutes. In this case, the student adds the same amount of sugar and tea bag to the same amount of hot water every day, but the temperature of the water could vary from day to day, affecting how much sugar dissolves.
According to the graph, the least amount of sugar dissolved on day 3, while the most sugar dissolved on day 5. The difference in temperature on these days could explain this variation. On day 3, the water may have been cooler, making it more difficult for the sugar to dissolve. On the other hand, on day 5, the water may have been hotter, which could have increased the solubility of the sugar.
To increase the amount of sugar that dissolves in the tea, the student could try using hotter water or stirring the sugar more vigorously to distribute it evenly throughout the water. Alternatively, the student could try adding the sugar gradually while stirring to give it more time to dissolve before adding more.
Answer:
I'm not 100% sure on this because mine hasn't been graded yet, but here are the answers I submitted.
Explanation:
Which day the least sugar dissolved and which day the most sugar dissolved:
Day 4 is when the least sugar dissolved, and Day 2 is when the most sugar dissolved.
What could have caused less sugar to dissolve on some days:
The temperature of the tea could have caused the sugar not to dissolve on some days.
What the student could do to his drink to make more sugar dissolve.
The student would need to add the sugar to the tea as soon as it's done boiling. The Sugar will dissolve faster in a warmer tea due to more energy of movement.
Be sure to stir the tea as you add the sugar. Stirring the sugar into the tea speeds up the rate of dissolving by helping distribute the sugar particles throughout the tea.
If the student were to use granulated sugar, those are smaller particles and have greater surface area. Greater surface area allows for more contact between the tea and the sugar.
Avogadro's constant is the same as the number of
a. magnesium atoms in 24g of magnesium
b. nitrogen molecules in 14g of nitrogen
c. copper II sulfate formula units in 160g of copper II sulfate
Answers
Avogadro's constant is the same as the number of copper II sulfate formula units in 160g of copper II sulfate; option C.
What is Avogadro's constant?Avogadro's constant is a number that describes the number of particles in 1 mole of a substance.
The value of the Avogadro constant is 6.02 * 10²³.
The carbon-12 isotope is used as the standard to define the mole of a substance.
12 grams of the carbon-12 isotope contains the Avogadro number of particles which is equal to 6.02 * 10²³.
Hence, 1 mole of a substance is defined as the amount of a substance that contains as many elementary particles as there are in 12 grams of carbo-12.
Considering the given substances:
a. 24g of magnesium off magnesium contains two moles of magnesium atoms.
b. 14g of nitrogen gas contains 0.5 moles of nitrogen gas molecules
c. 160g of copper (ii) sulfate contains 1 mole of copper (ii) sulfate formula units. Hence, this is equal to the Avogadro constant
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What volume of gas could be collected over water when 3.64g of Potassium reacts with an excess amount of Nitric acid (HNO3)? The conditions under which the experiment was run include an atmospheric pressure of 1.01 atm and a water temperature of 24°C. This experiment produced 1.03 L of hydrogen gas. The vapor pressure of the water at 24°C is 0.0293 atm.
1. Show a balanced equation for this reaction.
2. Calculate the partial pressure of the hydrogen gas.
3. Calculate the number of moles of Potassium.
4. Calculate the number of moles of hydrogen.
5. Calculate the theoretical volume of the hydrogen gas.
6. Calculate the percent error.
Answers
The volume of nitrogen gas produced is 1.11 L according to the chemical equation for the interaction between potassium and nitric acid: 2K + 6HNO3 3H2O + 2KNO3 + NH4NO3.
At 25 C and 1 atm, what is the vapour pressure of water?The equilibrium vapour pressure of the material is this partial pressure of vapour in equilibrium above a liquid. Water has a vapour pressure of 0.0313 atm, or 23.8 mm of mercury, at ambient temperature (25 °C; 760 mm Hg = 1 atm).
The volume of nitrogen gas generated can be calculated using the ideal gas law: PV = nRT
To determine how many moles of hydrogen gas were generated:
PV = nRT
n = PV/RT
n = (1.01 atm - 0.0293 atm) * 1.03 L / (0.0821 L·atm/mol·K * 297 K)
n = 0.0392 mol
The balanced chemical equation states that 1 mole of nitrogen gas is created when 2 moles of potassium react. As a result, the amount of nitrogen gas generated is:
n(N2) = 0.5 * n(K)
n(N2) = 0.5 * 3.64 g / 39.10 g/mol
n(N2) = 0.0441 mol
The volume of nitrogen gas created can now be calculated using the ideal gas law once more:
PV = nRT
V = nRT/P
V = 0.0441 mol * 0.0821 L·atm/mol·K * 297 K / (1.01 atm - 0.0293 atm)
V = 1.11 L
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name three obstacles that Mendeleev faced in his life
Answers
The three obstacles that Mendeleev faced in his life are as follows:
During his working time, technology did not exist. So, he worked with inaccurate and unprecise data. A large number of chemical elements were yet to be discovered. That is why he left spaces for them.He got into outrageous behavior when he suddenly married a second wife before giving divorce to his first wife. Who was Dmitri Mendeleev?Dmitri Mendeleev was a fascinating Russian teacher and scientist. He is often considered the father of the modern periodic table. This is because his contribution to the arrangement of chemical elements in the periodic table was unexceptional.
Therefore, the three obstacles that Mendeleev faced in his life are well described above.
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