Answers
Answer:
replacement
Explanation:
here is the ans
Answer:
\(1.replacement \\ \\ It \: is \: a \: single \: replacement \: \\ reaction \: where \: 1 \: atom \: of \: Zinc \ \\ metal \: displaces \: 2 H+ ions \: from \\ the \: hydrochloric \: acid \: to \: form \: \\ hydrogen \: gas \: and \: zinc \: chloride, \\ a \: salt.\)
Related Questions
Air is made up of 21% oxygen what is the other 78%?
Answers
Answer:
Its nitrogen
Explanation:
Answer:
Nitrogen
Explanation:
The air is made up from other things besides oxygen.
Glycolysis is the process by which energy is harvested from glucose by living things. Several of the reactions of glycolysis are thermodynamically unfavorable (nonspontaneous), but proceed when they are coupled with other reactions.
Reaction A: Pi+glucose⟶glucose-6-phosphate+H2OΔG=13.8 kJ/mol
Reaction B: Pi+fructose-6-phosphate⟶fructose-1,6-bisphosphate+H2OΔG=16.3 kJ/mol
Reaction C: ATP+H2O⟶ADP+PiΔG=−30.5 kJ/mol
Select every unfavorable reaction.
reaction B
reaction C
reaction A
Select every set of coupled reactions where the overall reaction is favorable.
reactions B and C
reactions A and B
reactions A and C
What is the net change in free energy if one set of reactions from the previous question is coupled so that the overall reaction is favorable? Note that if you selected more than one set of coupled reactions as favorable in the previous question, you may enter the net change for any one of your selected sets.
Answers
Answer:
Unfavorable reactions: Reaction A and Reaction B.
Coupled reactions favorable: Reactions B and C and Reactions A and C.
Net change:
Reactions B and C : -14.2kJ/mol
Reactions A and B : 30.1kJ/mol
Reactions A and C: -16.7kJ/mol
Explanation:
A reaction is thermodynamically favorable (spontaneous) if ΔG < 0. Thus, the unfavorable reactions -ΔG > 0- are:
Reaction A and reaction B.
When reaction C is coupled with reaction B and reaction A the chemical equation is:
ATP + fructose-1,6-phosphate ⟶ ADP + fructose-1,6-bisphosphate
ΔG = 16.3 - 30.5 = -14.2 kJ/mol
ATP + glucose ⟶ ADP + glucose-6-phosphate
ΔG = 13.8 - 30.5 = -16.7 kJ/mol
The coupled reaction of A and B has a change in free energy of:
ΔG = 13.8 + 16.3 = 30.1 kJ/mol
Net ionic equation for potassium sulfide and magnesium iodide
Answers
The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.
To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.
Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):
K2S -> 2K+ + S2-
Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):
MgI2 -> Mg2+ + 2I-
Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):
K+ + I- -> KI
Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):
Mg2+ + S2- -> MgS
Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:
2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS
To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).
Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:
S2- + Mg2+ -> MgS
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Mole Practice
1. How many particles of gold are in 2.3 moles of Au?
2. Calculate the number of moles of O2 in 15.5 grams of O2. (MM O2 = 32 g/mol)
3. Calculate the mass in grams of 2.47 x 1021 formula units of sodium oxide.
(MM Na₂O = 62 g/mol)
X
4. Calculate the number of atoms of titanium in 23.4 Kg Ti. (MM Ti = 48 g/mol)
2 H₂ + O₂ -> 2 H₂O
5. How many grams of O₂ are needed to produce 75.0 grams of H₂O? (MM O₂ = 32 g/mol)
(MM H₂O = 18 g/mol)
6. How many grams of H₂ are needed to react with 75.0 grams of O₂? (MM H₂ = = 2 g/mol)
(MM O₂ = 32 g/mol)
Answers
The number of particles of gold that are in 2.3 moles of Au is 1.38 * 10²⁴ particles.
The number of moles of O₂ in 15.5 grams of O₂ is 0.48 moles
The mass in grams of 2.47 x 10²¹ formula units of sodium oxide is 0.254 grams
The number of atoms of titanium in 23.4 Kg Ti is 2.93 * 10²⁶ atoms
The mass in grams of O₂ needed to produce 75.0 grams of H₂O is 66.67 grams of O₂
The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ is 9.375 g.
What is the number of particles in a mole of a substance?The number of particles in a mole of a substance is 6.02 * 10²³.
Considering the given questions:
The number of particles of gold that are in 2.3 moles of Au = 2.3 * 6.02 * 10²³
The number of particles = 1.38 * 10²⁴ particles.
The number of moles of O₂ in 15.5 grams of O₂ = 15.5/32
The number of moles of O₂ = 0.48 moles
The mass in grams of 2.47 x 10²¹ formula units of sodium oxide = 2.47 x 10²¹/ 6.02 * 10²³ * 62 g
The mass in grams of 2.47 x 10²¹ formula units of sodium oxide = 0.254 grams
The number of atoms of titanium in 23.4 Kg Ti = 6.02 * 10²³ * 23.4 * 1000/48
The number of atoms of titanium in 23.4 Kg Ti = 2.93 * 10²⁶ atoms
The mass in grams of O₂ needed to produce 75.0 grams of H₂O = 75/18 * 1/2 * 32
The mass in grams of O₂ needed to produce 75.0 grams of H₂O = 66.67 grams of O₂
The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ = 75/32 * 2 * 2 g
The mass in grams of H₂ that are needed to react with 75.0 grams of O₂ = 9.375 g.
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How will increasing the pressure on the system affect this equilibrium reaction?
shift equilibrium toward the left
shift equilibrium toward the right
no effect because pressure only affects equilibrium in gas state reactions
O no effect because silver chloride has a very low vapor pressure
Answers
Hehjsjshhshshshsh
chef needs to increase the temperature of a food dish. She thinks she can do this by stacking another dish on top of it. She has three dishes to choose from for the top dish: A, B, and C.
Which one of these dishes would make the food dish the warmest when placed on top of it? As part of your answer, explain how the energy and temperature of both the top dish and the food dish will change when the food dish warms up, and why.
Answers
Answer:
C)Because of high energy it produces high thermal energy (heat) resulting in increase in temperature of food dish.
HOPE THAT HELPS!!
Explanation:
C)Because of high energy it produces high thermal energy (heat) resulting in increase in temperature of food dish.
HOPE THAT HELPS!!
1. Which statement BEST explains why coal is used to generate electricity
despite the amount of pollution produced by burning coal?
A Compared to other fuels, coal produces more energy per kilogram.
B. Compared to other fuels, coal is relatively cheap and plentiful.
C. Coal burns without producing greenhouse gases.
D. Coal is a renewable source of energy.
Answers
Answer:
B
Explanation:
25 POINTS!!!!!!!!!
Natural selection involves changes in the genetic makeup of a population over a period of time. The random change of DNA from parent to offspring, called mutations, can help produce variations in offspring. Some mutations can be helpful, while others can be harmful. In this experiment, students modeled random mutations. Data was collected to determine if the mutations were helpful or harmful when trying to collect and eat food.
Imagine climate change causes an increase in global temperature, polar ice melts, and sea levels on Earth rise. The organisms in this study live in a coastal marsh. Global warming has caused flooding and the once marshy habitat is underwater. Compare and contrast the traits of each group. Which group would most likely survive and reproduce in this new habitat?
A) Group A
B) Group B
C) Group E
D) Group H
Answers
Answer:
Group H
Explanation:
Has the shortest amount of time to collect the cand and had an also shortv amount of time to eat.
What is true of a Lewis base?
A. A Lewis base donates electron pairs.
B. A Lewis base donates H* ions.
C. A Lewis base donates a salt in solution.
D. A Lewis base donates OH ions.
Answers
The statement that is true of a Lewis base is that a Lewis base donates electron pairs (option A).
What is a Lewis base and acid?A Lewis base is any nucleophylic compound that can donate a pair of electrons and form a coordinate covalent bond.
On the other hand, a Lewis acid is any electrophylic compound that can accept a pair of electrons and form a coordinate covalent bond.
This means that a Lewis base can donate a pair of electrons to a Lewis acid to form a product containing a coordinate covalent bond. This product is also referred to as a Lewis adduct.
Therefore, option A is correct about Lewis base
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Read the quote: "No tears in the writer, no tears in the reader." Which best explains the meaning of this quote?
Answers
Answer:
From personal experience
Explanation:
If is not felt by the writer, the reader will not feel it either!
Answer:
the writers emotions about the writing will affect the way the reader feels
Explanation:
What would be the volume of a balloon containing 64g of oxygen gas at STP (standard temperature and pressure)? You should be able to obtain this answer by calculation or by using logical reasoning.
Answers
Answer: 44.8 L
Explanation:
To find the volume, we would need to use the ideal gas law.
Ideal Gas Law: PV=nRT
We take the given information and plug it into the equation, but first, we have to manipulate the equation so that we are finding volume.
\(V=\frac{nRT}{P}\)
P= 1.00 atm (STP)
T= 273.15 K (STP)
R= 0.08206 Latm/Kmol
n= \(64g*\frac{1mol}{31.998 g O_{2} }=2 mol\)
\(V=\frac{(2 mol)(0.08206Latm/Kmol)(273.15 K)}{1.00atm} =44.8 L\)
422000 scientific notation form:
Answers
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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A driver needs to make a delivery to an office that is 30 km away. The driver has traveled for 45 minutes west down a straight road at 50 km/h. a. Has the driver traveled far enough to reach the office? Support your response. Input Field 1 of 2 Skip to input field
Answers
Answer: Yes
Explanation:
Convert \(30km\) to \(min.\) by using the conversion factor that is given which is \(\frac{50km}{1hr}\).
\(30km/\frac{1hr}{50km}/\frac{60min}{1hr}=36min\)
This means it would take 36 minutes for the driver to reach 30 km
What is science..
No Spam
Answers
Answer: science is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe
Explanation:
Answer:
Science is a very Idiot subject and doing dimag ka dahi xD
Describe the trend of the reactivity of the elements in group VII
Answers
The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group
Answer & Explanation:
The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.
Which substances will make a salt when combined?
Vinegar and soda
Soda and wine
Detergent and ammonia
Fertilizer and vinegar
Answers
Answer:
vinegar and soda
Explanation:
Mixing baking soda (sodium bicarbonate) and vinegar (acetic acid) causes a chemical reaction that produces a salt (sodium acetate) and water, as well as carbon dioxide gas.
Answer:
Fertilizer and vinegar
Explanation:
Fertilizer is a base, and vinegar is an acid. Salt is made when you combine a base and an acid. Plus, I got a 100% on the test and this was my answer.
propose a synthesis of each of the following compounds using the indicated starting material. you may use any organic compounds and any inorganic compounds or solvents of your choice. do not show any reactive intermediates, mechanisms, or transition states, but be sure to show each isolable compound along your synthetic route.
Answers
Organic compounds are substances in which carbon and hydrogen are covalently bonded to other elements.
Organic compounds. Any of a large class of compounds in which one or more carbon atoms are covalently bonded to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen. The few carbon-containing compounds not classified as organics are carbides, carbonates, and cyanides.
Organic compounds are derived directly or indirectly from plants and animals. Compounds derived from minerals are called inorganic compounds. Inorganic substances are a group of chemicals that do not contain carbon. Chemical compounds in living organisms are called organic compounds. Organic compounds are due to their association with living organisms and because they are carbon-containing compounds.
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23 2 C,H,.+ 13 0,8 CO, + 10 H,0
Butane is a hydrocarbon that is a liquid at room temperature making it easier to store and be used as an ignition source for many things like lighters and grills. How many grams of C,H,, will be needed to produce 20.00 grams of o, in this reaction? a. 2.4 grams C,H, b. 5.6 grams C.H.
Answers
which of the bonds shown in red are expected to have ir-active stretching frequencies?
Answers
C-C triple bond have different environment. Hence, it will show IR active stretching frequency.
What makes a stretch IR active?To be IR active, a molecule's dipole moment must change as a result of the vibration caused by IR light absorption. The dipole moment is a vector quantity that is affected by the molecule's orientation and the photon electric vector.Some bonds absorb infrared light more strongly than others, whereas others do not. A periodic shift in the dipole moment of the molecule is required for a vibrational mode to absorb infrared light. These vibrations are referred to as infrared active.To learn more about Dipole moment refer,
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The IR active stretching would be observed for the bonds that are not symmetrical.
Which bonds are IR active?We know that compounds that are polar implies that the molecules do have a dipole moment in the molecule. This means that the bond is not symmetrical owing to the fact that the groups that are attached to the central atom of the bond are not the same.
The IR active compounds are the compounds that are have bonds that are not symmetrical. All we need is to look at the bonds and find out the ones that are not symmetrical and hence would have a net dipole moment.
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What do I put here help
Answers
Answer: all the organisms blend in with their habitat
Explanation:
Hope that helped
What is the pH of a .00034 M of HCl solution?
3.5
5.3
3.0
5.0
Answers
Answer:
pH = 3.5
Explanation:
HCl is a strong acid, so we can use this little formula to find the pH of the solution:
pH = -log[H3O+]
(where H3O+ is the strong acid, HCl)
So we just plug in the molarity for the concentration of the acid...
pH = -log(0.00034)
Solve.
pH = 3.468521083
And apply sig. figs....
pH = 3.5
1. If 4.0 L of gas in the lungs have a pressure of 1.0 atm and are kept at body temperature (37 degrees Celsius), how many
moles are present in the lungs? Show your work.
Answers
There are approximately 0.16 moles of gas present in the lungs.
Steps
To solve this problem, we can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:
PV = nRT
where R is the gas constant.
First, we need to convert the temperature to Kelvin:
T = 37°C + 273.15 = 310.15 K
Next, we can plug in the given values:
P = 1.0 atm
V = 4.0 L
T = 310.15 K
We also need to find the value of R, which depends on the units we are using for pressure, volume, and temperature. In this case, we are using atmospheres, liters, and Kelvin, so we can use the value:
R = 0.08206 L·atm/K·mol
Now we can rearrange the ideal gas law to solve for the number of moles:
n = PV/RT
n = (1.0 atm)(4.0 L)/(0.08206 L·atm/K·mol)(310.15 K)
n = 0.1638 mol
Therefore, there are approximately 0.16 moles of gas present in the lungs.
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An aqueous solution of 4mol/L nitric acid is electrolysed in an electrolytic cell using graphite electrodes, write the chemical symbol for all the ions in the electrolytic cell?
Answers
The main ions present in the electrolytic cell during the electrolysis of 4 mol/L nitric acid are H+, NO3-, OH-, and NO2. Additionally, water (H2O) is also present as the solvent.
Hydrogen ion (H+): When nitric acid dissolves in water, it ionizes to release hydrogen ions, which are positively charged. The chemical symbol for the hydrogen ion is H+.
Nitrate ion (NO3-): Nitric acid also dissociates to form nitrate ions. These ions have a negative charge, and their chemical symbol is NO3-.
Hydroxide ion (OH-): Water molecules can undergo self-ionization, producing hydroxide ions and hydrogen ions. In the presence of water, nitric acid can also lead to the formation of hydroxide ions, OH-.
Nitrogen dioxide (NO2): During the electrolysis process, some nitrate ions may be oxidized at the anode to form nitrogen dioxide gas. The chemical symbol for nitrogen dioxide is NO2.
Water (H2O): Water itself is present in the electrolytic cell. It serves as the solvent and also participates in ionization reactions.
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helppp What function does adding a coefficient in a chemical equation serve?
Coefficients cannot be added or changed without describing different substances.
It tells whether the reactants must be exposed to outside factors to make them react.
It balances the equation, ensuring each side of the reaction has an equal number of atoms.
It describes the physical state of the reactant or product to which it is attached.
Answers
Answer: The answer is option C. (It balances the equation, ensuring each side of the reaction has an equal number of atoms.)
Explanation:
What is the molarity of a solution containing 0.05 moles of solute in 0.25L of solution?
Answers
Answer:
0.2 M
Explanation:
The molarity is the number of moles per liter:
(0.05 moles)/(0.25 liter) = 0.2 moles/liter = 0.2 M
CAN SOMEONE HELP WITH THIS QUESTION?✨
Answers
1a. The volume (in cm³) of the block is 1042.734 cm³
1b. The volume (in L) of the block is 1.04 L
1c. The density (in g/mL) of the block is 0.907 g/mL
1d. The block will not sink
1a. How do I determine the volume in cm³?The volume of the block in cm³ can be obtained as follow:
Dimension = 11.1 cm × 154 mm × 0.061 m =Volume of block (in cm³) = ?Volume of block = dimension
Volume of block = 11.1 cm × 154 mm × 0.061 m
Volume of block = 11.1 cm × (154 / 10) cm × (0.061 × 100) m
Volume of block = 11.1 cm × 15.4 cm × 6.1 cm
Volume of block (in cm³) = 1042.734 cm³
1b. How do I determine the volume in L?The volume of the block in L can be obtained as follow:
Volume of block (in cm³) = 1042.734 cm³ Volume of block (in L) = ?1000 cm³ = 1 L
Therefore,
1042.734 cm³ = (1042.734 cm³ × 1 L) / 1000 cm³
1042.734 cm³ = 1.04 L
Thus, we can say that the volume of block (in L) is 1.04 L
1c. How do I determine the density in g/mL?We can obtain the density in g/mL as shown below:
Volume of block = 1042.734 cm³ = 1042.734 mLMass of block = 9.46×10² gDensity of block =?Density = mass / volume
Density of block = 9.46×10² / 1042.734
Density of block = 0.907 g/mL
1d. How do I know if the block will sink or not?First, we shall determine the density of the liquid. Details below:
Volume of liquid = 780 mLMass of liquid = 724.11 gDensity of liquid =?Density = mass / volume
Density of liquid = 724.11 / 780
Density of liquid = 0.928 g/mL
Now, we shall compare the density of the block and liquid to detect whether or not the block will sink. Details below:
Density of block = 0.907 g/mLDensity of liquid = 0.928 g/mLSince the density of the block is smaller than that of the liquid, the block will not sink in the liquid.
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Why are standard electrode potentials usually measured at 1.0 M electrolyte concentration?
Answers
Answer:
To avoid variation due to concentration
Explanation:
Hope this helps :)
At a temperature of 393 K, the pressure of a sample of nitrogen is 1.07 atm. What will the pressure be at a temperature of 478 K? (Assume constant volume)
Answers
Answer:
1.30atm
Explanation:
P1/T1 = P2/T2
1.07/393 = P2/478
Answer: the first one is correct
Explanation:
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Which chemical reaction is correctly balanced? *
a. CH4 +2O2 → CO2 +2H2O
b. 2CH4 +2O2 → CO2 +2H2O
c. CH4 +O2 → CO2 +H2O
d. None of the above
Answers
Which chemical reaction is correctly balanced? *
a. CH4 +2O2 → CO2 +2H2O
b. 2CH4 +2O2 → CO2 +2H2O
c. CH4 +O2 → CO2 +H2O
d. None of the above
Explanation:
d none of the above
Answer:
The answer is a. CH4 + 2O2 --- CO2 + 2H2O
Explanation:
A balanced chemical reaction must have the same number of each type of atom on both sides according to the law of conservation of mass:
1 carbon 4 hydrogen + 4 oxygen ----- 1 carbon 2 oxygen + 4 hydrogen
2 oxygen =
1 carbon 4 hydrogen 4 oxygen ---- 1 carbon 4 hydrogen 4 oxygen
Since each type of atom has the same amount on both sides, the chemical formula is balanced.