A molecule of H2SO4 contains how many atoms?
Answers
Answer:
2 hydrogen atom, 1 sulfer atom, and 4 oxygen atoms.
Related Questions
How many moles of water can be produced if 8 moles H2 are used?
Answers
The number of moles of water that would be produced will be 4 moles
Stoichiometric calculationsFrom the balanced equation of the reaction:
2H2 + O2 ---------> 2H2O
Mole ratio of H2 and H2O = 2:1
Mole of H2 = 8 moles
Equivalent mole of H2O = 8/2
= 4 moles
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Which of the following is a unit for acceleration?
A) m/s
B) m/s2
C) s/m 2
D) s/m
Answers
That is Δv/Δt
Velocity is in meters per second, time is in seconds. When you actually calculate acceleration, you get (m/s)/(s). You could move the s in the velocity to the bottom or cross multiply, but in the end you get m/s^2
Answer B
A typical volume leaving the large intestine might be 140 mL. If the volume exiting the large intestine were 364 mL, then it would most likely indicate a case of
Answers
If the volume exiting the large intestine were 364 mL, then it would most likely indicate a case of diarrhea. This condition may lead to dehydration.
Diarrhea: causes and diagnosisDiarrhea is an unhealthy condition that occurs when the body excretes an excessive amount of water.
Diarrhea must be treated because this condition can lead to dehydration (it may even lead to death in severe cases).
Both diarrhea and vomiting may lead to the loss of body fluids.
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Explain in a three-paragraph essay the mechanics of how a battery works. How does the choice of metals used in a battery affect its performance? what specific metals work best?
Answers
A battery is a device that converts chemical energy into electrical energy through a process known as an electrochemical reaction.
How does a battery work ?When a battery is connected to a circuit, the electrochemical reaction causes a flow of electrons from the anode to the cathode, generating an electric current that can power a device.
The metal chosen for the anode must be capable of losing electrons easily, while the metal chosen for the cathode must be capable of accepting electrons. The choice of metals can also affect the voltage and capacity of the battery, as well as its overall efficiency.
In general, the metals used in a battery should have a large difference in their electronegativity values, which determines how easily an atom can attract electrons. Common metals used in batteries include zinc, lithium, nickel, and cadmium.
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How did Maryland change from the Precambrian to the Cenozoic?
Answers
Do the following elements represent the same
group, period, or neither?
Li, C, F
F, S, P
O, S, Se
[Choose ]
[Choose ]
[Choose ]
Answers
According to the electronic configuration, Li,C, F belong to same period as they have 2 shells .Among F,S, P it is neither same period or group and for O,S,Se they belong to the same group as they have 6 valence electrons.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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when copper metal is heated it reacts with a gas in the air . what iz the name of the product formed when copper reacts with a gas in the air ?
Answers
Answer:
Heated copper metal reacts with oxygen to form the black copper oxide. The copper oxide can then react with the hydrogen gas to form the copper metal and water.
Answer:
answer-COMPOUND COPPER OXIDE
how many grams of AgNO3 (MM=169.87) are needed to prepare 0.125 M solution in 250 mL of water?
a. 0.5 g
b. .03 g
c. 5.3 g
d. 84.9g
Answers
Answer:
Correct answer-C 5.3g
Explanation:
Molarity = no. of moles of solute/ volume of of solution in litre
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,so the mass of 0.03125 moles of AgNO3 = 0.03125×169.87= 5.3084g
The grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water is 5.3 grams.
How do we calculate mass from moles?Moles is a unit which is used to define any amount and it is calculated as:
n = W/M, where
W = required mass
M = molar mass
Given molarity of AgNO₃ = 0.125 M
Volume of water = 250mL = 0.25L
moles (n) from the molarity (M) will be calculated as:
n = M × V
n = (0.125)(0.25) = 0.0312 moles
Now we calculate the mass of AgNO₃ by using the above formula as:
W = (0.0312mol)(169.87g/mol)
W = 5.30 g
Hence option (c) is correct.
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What MASS of NaCl are required to make 2.69L of a 0.14M solution?Use the correct abbreviation for the UNITS
Answers
To solve this problem, let's use the definition for molarity:
Replacing the values of the problem:
Now, to find the mass, we multiply by the molecular weight of NaCl. (Which is about 58.44g/mol)
The answer is approximately 22.2g of NaCl
The molecular weight of Magnesium Sulphate
Answers
Melting point: 2,055°F (1,124°C)
Formula: MgSO4
Density: 2.66 g/cm³
2 moles of NO, was placed in an empty I dm' bottle and allowed to reach equilibrium according to the equation:
At equilibrium, 1.2 moles of N,O, dissociated. Calculate the value of the equilibrium constant for the reaction at that
temperature.
Answers
2NO(g) ⇌ N2(g) + O2(g)
According to the problem statement, 2 moles of NO were placed in a 1 dm^3 bottle and allowed to reach equilibrium, and at equilibrium, 1.2 moles of NO had dissociated. This means that the initial concentration of NO was:
[NO]initial = 2 mol / 1 dm^3 = 2 M
And the concentration of NO at equilibrium is:
[NO]equilibrium = (2 - 1.2) mol / 1 dm^3 = 0.8 M
Since the stoichiometry of the balanced equation is 2:1:1 for NO, N2, and O2, respectively, the equilibrium concentrations of N2 and O2 will also be 0.6 M.
The equilibrium constant (Kc) can be calculated using the equilibrium concentrations of the reactants and products, raised to the power of their stoichiometric coefficients. Therefore:
Kc = ([N2][O2]) / ([NO]^2)
Substituting the equilibrium concentrations into the equation, we get:
Kc = (0.6 M x 0.6 M) / (0.8 M x 0.8 M)
Kc = 0.5625
Therefore, the value of the equilibrium constant for the reaction at that temperature is 0.5625. Note that the units of Kc depend on the stoichiometry of the balanced equation. Since the stoichiometric coefficients are all 1, the units of Kc in this case are M^-1
giving brainly if correct and explained
Answers
Answer:
D.
Explanation:
A concentrated solution is one that has a lot of solute (the substance being dissolved) in the solvent (the substance doing the dissolving). When a solution is concentrated, it means it has a high ratio of solute to solvent, so the answer is D.
Hope this helps.
Identity each box as a element, compound or mixture. With an explanation too please!
Answers
Answer:
Hello!!! Princess Sakura here ^^
Explanation:
a) compound because it's made up of elements.
b) element because they haven't bonded yet.
c) mixture because there are many compounds within a mixture.
d) compound because it's made up of elements.
e) compound because it's made up of elements.
f) mixture because there are many compounds within a mixture.
All matter has both physical and chemical properties.
True or False
Answers
Answer:
F
Explanation:
The true statements from the list are:
Hydrogen gas is a better reducing agent than tin metal.
Tin metal will reduce Cu2+ to copper metal.
The cell potential for a cell consisting of tin metal immersed in a tin(II) solution and the standard hydrogen electrode is not known because it was not measured in this experiment.
Copper metal will not reduce H+ to hydrogen gas.
Explanation:
Hydrogen gas is a better reducing agent than tin metal: This is because hydrogen gas has a lower reduction potential than tin metal. A reducing agent tends to lose electrons and get oxidized, and the lower the reduction potential, the more easily it can lose electrons and act as a reducing agent.
Zn2+ is the best oxidizing agent studied in this experiment: This statement is false. The best oxidizing agent is the one with the highest reduction potential, which is a measure of its ability to gain electrons and get reduced. The statement does not provide any comparison to other oxidizing agents, so it cannot be evaluated.
Tin metal will reduce Cu2+ to copper metal: This is a true statement. Tin metal has a higher reduction potential than Cu2+, so it can donate electrons to Cu2+ and reduce it to copper metal while getting oxidized to Sn2+.
Answers
The true statements from the list are 1. Hydrogen gas is a better reducing agent than tin metal, 2. Tin metal will reduce Cu2+ to copper metal and 3. Copper metal will not reduce H+ to hydrogen gas.
1. Hydrogen gas is a better-reducing agent than tin metal: This is true because hydrogen gas has a lower reduction potential than tin metal. A reducing agent tends to lose electrons and get oxidized, and the lower the reduction potential, the more easily it can lose electrons and act as a reducing agent.
2. Tin metal will reduce Cu2+ to copper metal: This is a true statement. Tin metal has a higher reduction potential than Cu2+, so it can donate electrons to Cu2+ and reduce it to copper metal while getting oxidized to Sn2+.
3. Copper metal will not reduce H+ to hydrogen gas: This is true because copper metal has a lower reduction potential than H+. Copper metal cannot donate electrons to H+ and reduce it to hydrogen gas since it is not strong enough reducing agent compared to hydrogen.
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What properties does metals tend to have
Answers
Answer:
1. can conduct heat and electricity.
2. are solid in room temperature except mercury.
3. they are malleable
Answer:
kim loại phổ biến nhất có thể như sắt (e), nhôm (Al), đồng (Cu), vàng (Au), bạc (Ag), Kẽm (Zn)…
Explanatio:
describe what reclaimed water is and explain what it is typically used for. read more >>
Answers
Reclaimed water, also known as recycled water, is treated wastewater that has been purified to remove harmful contaminants and made safe for reuse.
It is an important resource that helps to conserve precious freshwater supplies and protect the environment.
Reclaimed water is typically used for non-potable purposes such as irrigation of landscapes, agricultural crops, and golf courses, as well as for industrial processes, dust control, and fire protection.
It can also be used for groundwater recharge and in certain cases, even for toilet flushing. Although reclaimed water may not be suitable for drinking, it is treated to meet strict standards and is subject to rigorous monitoring to ensure that it is safe for its intended use.
The use of reclaimed water can help to reduce the demand for freshwater, lower the cost of water treatment and distribution, and provide a sustainable and reliable source of water for various applications.
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8.two samples are carburized by exposing the surface to a gas for 20 minutes. sample a is carburized at 725 c and sample b is carburized at 660 c. in which sample will the carbon penetrate deeper into the material?
Answers
Sample a carburized at 725°C will have a deeper carbon penetration compared to sample b carburized at 660°C, due to the higher temperature facilitating faster carbon diffusion.
Based on the given information, the carbon will penetrate deeper into the material in sample a, which is carburized at 725°C. Carburization is a process that involves introducing carbon into the surface of a material to increase its carbon content and hardness.
The depth of carbon penetration during carburization is influenced by several factors, including temperature and time. Higher temperatures generally promote greater carbon diffusion into the material. In this case, sample a is carburized at a higher temperature of 725°C compared to sample b, which is carburized at 660°C.
At higher temperatures, the kinetic energy of the carbon atoms increases, leading to faster diffusion and deeper penetration into the material. Therefore, sample a carburized at 725°C will experience more significant carbon diffusion and deeper penetration compared to sample b carburized at 660°C.
It's worth noting that the time of exposure to the carburizing gas also plays a role in carbon penetration. However, since the time of exposure is the same for both samples (20 minutes), the temperature becomes the determining factor in this case.
In summary, sample a carburized at 725°C will have a deeper carbon penetration compared to sample b carburized at 660°C, due to the higher temperature facilitating faster carbon diffusion.
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This type of pure substance contains more than one type of element chemically bonded
A. Compounds
B. Heterogeneous mixture
C. Homogeneous mixture
D. Elements
Answers
Answer:
A. Compounds
Explanation:
Firstly, don't let the word "pure" confuse you; this is pretty much irrelevant to the question.
The key to answering this question lies in "substance" and "more than one type of element chemically bonded."
Something you ought to memorize is that a substance is either an element or compound. Therefore, you can eliminate choices B./C.
Next, use the part of the definition that says "more than one type of element chemically bonded" to conclude that it's a compound. Not only is this the definition of a compound, but the fact that is says more than one type of element should automatically tell you that it is different from just a regular element (Choice D.).
How many grams of Fe2O3 will be produced from 37.5 moles of iron?
Answers
37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.
To determine the number of grams of Fe₂O₃ produced from 37.5 moles of iron (Fe), we need to use the balanced chemical equation for the reaction in which iron reacts to form Fe₂O₃.
The balanced equation for the reaction is:
4Fe + 3O₂ -> 2Fe₂O₃
From the balanced equation, we can see that 4 moles of iron react to produce 2 moles of Fe₂O₃. This means that the molar ratio between Fe and Fe₂O₃ is 4:2 or 2:1.
Now, we can set up a simple proportion to calculate the number of moles of Fe₂O₃ produced:
(37.5 moles Fe) * (2 moles Fe₂O₃ / 4 moles Fe) = 18.75 moles Fe2O3
So, 37.5 moles of iron will produce 18.75 moles of Fe₂O₃.
To convert moles to grams, we need to use the molar mass of Fe₂O₃. The molar mass of Fe₂O₃ can be calculated by adding the atomic masses of iron (Fe) and oxygen (O) in the compound:
(2 x atomic mass of Fe) + (3 x atomic mass of O) = (2 x 55.845 g/mol) + (3 x 16.00 g/mol) = 159.69 g/mol
Now, we can calculate the mass of Fe₂O₃ produced:
Mass = moles x molar mass
Mass = 18.75 moles x 159.69 g/mol = 2990.31 grams
Therefore, 37.5 moles of iron will produce 2990.31 grams of Fe₂O₃.
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A sample of cadmium is found to be 12.9 % Cd-110, 13.3 % Cd-111, 36 % Cd-112, 30.3 % Cd-114 and 7.5 % Cd-116. What is the average atomic mass of cadmium, based on these percent abundance?
Answers
The average atomic mass of cadmium based on the given percent abundance is approximately 114.16 atomic mass units (amu).
What are isotopes?Isotopes are atoms of the same element that have different numbers of neutrons in their nuclei, resulting in different atomic masses.
To calculate the average atomic mass of cadmium based on the given percent abundance, we need to first find the atomic masses of each isotope, and then use the following formula:
average atomic mass = (percent abundance of isotope 1/100 x atomic mass of isotope 1) + (percent abundance of isotope 2/100 x atomic mass of isotope 2) + ...
The atomic masses of the isotopes of cadmium are:
Cd-110: 109.903002
Cd-111: 110.904178
Cd-112: 111.902757
Cd-114: 113.903358
Cd-116: 115.904756
Using the formula, we can calculate the average atomic mass of cadmium as follows:
average atomic mass = (12.9/100 x 109.903002) + (13.3/100 x 110.904178) + (36/100 x 111.902757) + (30.3/100 x 113.903358) + (7.5/100 x 115.904756)
average atomic mass = 14.155350058
Therefore, the average atomic mass of cadmium based on the given percent abundance is approximately 114.16 atomic mass units (amu).
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Question 11
Which formula represents a hydrocarbon?
C₂H6
C₂H5OH
C₂H5Cl
C₂H6O
Answers
Answer:
C₂H6
Explanation:
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A
A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:
A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.
B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.
D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.
In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A
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Suppose a gas-filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure when the bulb has a temperature of 20.0∘C. (a) Find the gauge pressure inside such a bulb when it is hot, assuming its average temperature is 60.0∘C (an approximation) and neglecting any change in volume due to thermal expansion or gas leaks. (b) The actual final pressure for the light bulb will be less than calculated in part (a) because the glass bulb will expand. What will the actual final pressure be, taking this into account? Is this a negligible difference?
Answers
The gauge pressure inside such a bulb when it is hot is 1.3 x 10⁴. The final actual gauge pressure is 1.14 x 10⁵ Pa
According to Gay-Law, Lussac's pressure and absolute temperature are exactly related for a constant volume. P/T = K, or P alpha T, where K is a constant, and similarly
Consequently, using the gas equation and the supplied values as replacements:
P₁ / T₁ = P₂ / T₂
P₂ = P₁ /T₁ X T₂
P₂ = 1.01 x10⁵/ 293 x 331
P₂ = 1.14 x 10⁵ Pa
Thus,
Pgauge = P₂ - P atm
P gauge = 1.14 x10⁵ - 1.01 x10⁵ = 1.3 x 10⁴
Gauge pressure is the term used to describe the pressure that is measured by atmospheric pressure.
When internal pressure exceeds atmospheric pressure locally, the term "gauge pressure" is used.
As per the given data, we have to determine the final actual gauge pressure.
Initial pressure = Pₐ= atmospheric pressure
Final pressure = P +Pₐ
Final pressure = 1.3 x 10⁴ + 1.01 x10⁵ = 1.14 x 10⁵ Pa
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The outer shell of this element was determined as illustrated here. It must be a _____.
: light metal
: heavy metal
: non metal
: noble gas
Answers
The outer shell of the given element was determined as illustrated must be a noble gas. Therefore, option D is correct.
What are noble gases?Noble gases can be described as the 6 elements that are organized in group 18 of the modern periodic table. The noble gases are Helium, Neon, Argon, Krypton, Xenon, and Radon.
Under standard temperature and pressure, noble gases exist in the gaseous form and possess low reactivity. Therefore, noble gases are also referred to as inert gas. All the noble gases exhibit stable electronic configurations in their valence shell that are completely filled. Noble gases generally exist as monoatomic.
The general outer configuration of the noble gases can be written as ns²np⁶, n is the principal quantum number. Therefore, the given electron dot diagram has eight electrons in its valence shell so it is representing a noble gas.
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Why does a tree cast a shadow during the daytime? A. The tree is a source of light for the Earth. B. The tree creates sunlight. C. The tree blocks light from the Sun. D The tree pulls the light off of the ground.
Answers
The spontaneous clustering of lipids is driven by an energetically favorable increase in the _______ of water.
Answers
The spontaneous clustering of lipids is driven by an energetically favorable increase in the entropy of water.
When lipids cluster together, they create a hydrophobic environment that excludes water molecules.
This leads to an increase in the disorder or randomness of water molecules, which is known as entropy. Since the increase in entropy is energetically favorable, water molecules tend to cluster around the hydrophobic region of the lipids, causing them to spontaneously form clusters or aggregates.
This clustering helps to minimize the disruption to the water structure and maximize the stability of the system. Since the increase in entropy is energetically favorable, water molecules tend to cluster around the hydrophobic region of the lipids, causing them to spontaneously form clusters or aggregates. In summary, the energetically favorable increase in the entropy of water drives the spontaneous clustering of lipids.
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When the umbilical cord is tied after birth, the umbilical arteries close by filling in with. A) placental fluid. B) platelet plugs. C) connective tissue.
Answers
When the umbilical cord is tied after birth, the umbilical arteries close by filling in with connective tissue. The umbilical arteries carry deoxygenated blood from the fetus to the placenta, where the blood is oxygenated and returned to the fetus via the umbilical vein.
When the umbilical cord is cut, the flow of blood from the placenta to the fetus ceases, and the umbilical arteries and vein begin to constrict. This constriction is caused by the contraction of smooth muscles in the vessel walls and the closure of small valves within the vessels. As the umbilical arteries constrict, the flow of blood to the placenta decreases and the vessels begin to fill in with connective tissue. Over time, the connective tissue replaces the smooth muscle and valve tissue in the vessel walls, resulting in the complete closure of the umbilical arteries. This process is important to prevent bleeding and infection in the newborn.
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a student adds solid silver chloride (agcl) to each of two beakers: one containing 1.0 l of pure water, and one containing 1.0 l of 0.500 m nacl. in which will agcl be more soluble, and why?
Answers
AgCl will be more soluble in pure water than in 0.500 M NaCl solution. This is because the high concentration of Cl- ions in the NaCl solution will decrease the solubility of AgCl due to the common ion effect.
The solubility of solid silver chloride (AgCl) will be affected by the presence of other ions in the solution. When AgCl is added to pure water, it will dissociate into its constituent ions, Ag+ and Cl-.
However, in the presence of 0.500 M NaCl, the concentration of Cl- ions in the solution will increase. This increase in Cl- concentration will shift the equilibrium of AgCl dissociation towards the formation of more AgCl, making it less soluble.
The presence of other ions in the solution can affect the solubility of a solute, and this phenomenon is an important consideration in many chemical reactions and processes.
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Describe the changes to the coastline pictured above. Look particularly at North and South Monomy Island.
Answers
Where is the picture?
Complete the sentence: Cellular respiration occurs ________________.
Group of answer choices
only in plant cells
only in animal cells
only in chlorophyll
in plant and animal cells
Answers
Answer:
in plant and animals cells