The form of hemoglobin with iron in an oxidized state is ________.
a. oxyhemoglobin
b. deoxyhemoglobin
c. methemoglobin
d. carboxyhemoglobin
Answers
The form of hemoglobin with iron in an oxidized state is known as methemoglobin.
In this state, the iron within the heme group of hemoglobin is in the ferric (Fe³⁺) state, whereas in its normal functional state, it is in the ferrous (Fe²⁺) state.
Methemoglobin formation can occur when there is an alteration in the iron oxidation state, leading to the inability of hemoglobin to bind and transport oxygen effectively. This can happen due to exposure to certain drugs, chemicals, or genetic abnormalities affecting the function of enzymes involved in maintaining the iron in its reduced state. When methemoglobin is present in high levels, it can result in a condition called methemoglobinemia, which is characterized by reduced oxygen-carrying capacity in the blood.
The other options listed are:
a. Oxyhemoglobin: This is the form of hemoglobin when oxygen is bound to it.b. Deoxyhemoglobin: This is the form of hemoglobin after it has released oxygen.d. Carboxyhemoglobin: This is a form of hemoglobin where carbon monoxide (CO) is bound to it instead of oxygen.To learn more about hemoglobin, here
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Related Questions
You have a sample containing 2.21 moles of chlorine. How many molecules of chlorine are in this sample?
Answers
Answer:
13.3042 x 10^23
Explanation:
2.21 Cl x (6.02 x 10^23) = 13.3042 x 10^23
Moles to molecules are converted by multiplying the moles to the formula of molecules which is (6.02 x 10^23)
When you add wind power to the electric power grid, which pollution issue are you most likely to help address in the U.S.? (Think about where energy comes from and the downsides of each fuel source)O Sulfur oxide (SO and SO2) emissions from coal-fired power plantsO energy technology O the crude oil
Answers
When you add wind power to the electric power grid, you are most likely to help address the issue of sulfur oxide (SO and SO2) emissions from coal-fired power plants in the U.S.
Coal-fired power plants are a significant source of electricity in the United States, but they also produce a large amount of air pollution, including sulfur oxide emissions. When sulfur oxides are released into the air, they can react with other chemicals to form acid rain, which can have harmful effects on the environment and human health.
By adding wind power to the electric grid, we can reduce the amount of electricity that is generated by burning coal, which can help to reduce sulfur oxide emissions from power plants. Wind power is a clean, renewable source of energy that does not produce any harmful air pollutants, making it a more environmentally friendly alternative to coal-fired power.
Overall, wind power can help to address the issue of sulfur oxide emissions from coal-fired power plants and can help to promote a cleaner and more sustainable energy future in the United States.
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How does moving water help shape earth?
Answers
Answer:
Moving water helps plant's and islands form and grow. Which shapes earth.
Which of the following ions will act as a weak base in water? A) NO2 B) C10- C) HS- D) F- E)
Answers
Among the following ions, option (c) HS- and and option (d) F- will act as a weak base in water.
Ions are electrically charged atoms or molecules. The number of positively charged protons in an ion is not the same as the number of negatively charged electrons. In turn, the net charge of an ion is either positive or negative. Anions are negatively charged ions, and cations are positively charged ions.
NO2- is the conjugate base of the strong acid HNO3, so it will be a strong base.Cl0- is the conjugate base of the strong acid HClO, so it will also be a strong base.F- is the conjugate base of the weak acid HF, but it is a very weak base. The value of Kb for F- is 1.5 x 10-11. This means that F- is a weaker base than HS-.HS- is the conjugate base of the weak acid H2S, so it will also be a weak base.The ion HS⁻ will act as a weak base in water.Thus, among the following ions, option (c) HS- and and option (d) F- will act as a weak base in water.
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True or False: One reason for multiple atomic models over the
years is that atoms and their parts, subatomic particles, are
invisible. Atomic models changed as more technologies
became available to scientists.
A. True
B. False
Answers
Answer:
The answer is A. True
Explanation:
hope i helped
A. True
Atom in simple terms is the basic singular unit into which matter can be divided without any use or discharge of energy.
One of the major reasons for having multiple atomic models over the years is that atom and their parts, subatomic particles, are invisible.
This is where the atomic models came into play. Atomic models were theories about the structure and working of atoms based on the information that was available at that time.
The first atomic model was proposed by J.J Thomson, which is also called the plum pudding model. It proposed that within the atom there were negatively charged particles (electrons) that were floating in a positively charged liquid
The atomic model used today is Schrodinger's atomic model.
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1. At Time 1, a cool air mass is moving from Location 1 toward a stationary warm air mass at Location 2. After the cool air mass collides with the warm air mass at Time 2, clouds begin to appear over Location 2. The partial model below shows the two air masses at Time 1, but does not show their interaction at Time 2.
Answers
The warm and the cool air masses affects the formation of clouds and precipitation.
Does warm and cool air masses affect cloud formation?Warm and cool air masses can affect cloud formation. Clouds are formed when water vapor in the atmosphere rises and cools, condensing into tiny water droplets or ice crystals. The type and amount of clouds that form can be influenced by the temperature and moisture content of the air masses.
In general, the interaction between warm and cool air masses can result in cloud formation and precipitation.
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density of 2.5g and mass of 5g what is the volume
Answers
Answer: Volume = 2g
Explanation: In order to calculate the density of an object you divide the mass by the volume (d=m/v). In this case, you have invert the equation to solve for the volume (v=m/d). The mass of 5g/the density of 2.5g = 2g
Hope this helps:)
Some fruits and vegetables are preserved by pickling them. Nandini got confused
with the various steps to be taken to preserve mangoes. Can you help her to
arrange them in the correct order?
1. Cut the mangoes into pieces.
2. Keep the pieces in the sun.
3. Add salt to the pieces.
4. Store it in a dry jar.
5. Wash and dry them
Answers
Answer:
ye
Explanation:
ye
A 5.00 g sample of al reacts with excess h2so4. what volume of h2 gas is produced at stp
Answers
6.23L volume of h2 gas is produced at stp.
How do you calculate the H2 gas volume?Given that one mole of dihydrogen (H2) weighs 2,0159 g/mol, the experimental density of hydrogen—which is 0,0899 g/L at 0 °C and 0,0837 g/L at 20 °C—can be used to compute the exact molar volume of hydrogen.
How do you calculate the H2 gas volume at STP?This implies that at STP, one mole of hydrogen also takes up 22.4 liters of space. Therefore, at STP, 10moles of hydrogen gas will take up =22.410=224litres of space. In other words, when 460g of salt combines with extra water at STP, 224litres (or 224000mL) of hydrogen gas are released.
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the question you are looking for is
A 5.00 g sample of Al reacts with excess H2SO4. What volume of H2 gas is produced at STP?
2Al(s) + 3H2SO4(aq)→ Al2(SO4)3(aq) + 3H2 (g)
In a reaction 25.00mL of nitric acid required 51.4mL of 0.73M calcium hydroxide. Calculate the grams of nitric acid per liter of solution
Answers
Answer:
47.27 g HNO₃
Explanation:
The reaction between nitric acid (HNO₃) and calcium hydroxide (Ca(OH)₂) is the following:
2HNO₃(aq) + Ca(OH)₂(aq) → Ca(NO₃)₂ + 2H₂O(l)
According to the chemical equation, 2 moles of HNO₃ reacts with 1 mol of Ca(OH)₂. At the point of total neutralization, the total number of moles of HNO₃ reacts with the total number of moles of Ca(OH)₂:
2 x moles HNO₃ = moles Ca(OH)₂
The number of moles is equal to the product of molarity of the solution (M) and the volume in liters (V):
M(HNO₃) = ?
M(Ca(OH)₂) = 0.73 M
V(HNO₃) = 25.00 mL x 1 L/1000 mL = 0.025 L
V(Ca(OH)₂) = 51.4 mL x 1 L/1000 mL = 0.0514 L
So, we can write the equation at neutralization point as:
2 x (M(HNO₃) x V(HNO₃)) = M(Ca(OH)₂) x V(Ca(OH)₂)
From this, we can calculate the molarity of HNO₃:
M(HNO₃) = (M(Ca(OH)₂) x V(Ca(OH)₂))/2 x V(HNO₃)
= (0.73 M x 0.0514 L)/(2 x 0.025 L)
= 0.75 M HNO₃
We can convert the molarity from M (mol/L) to g/L by using the molecular weight of HNO₃:
Mw(HNO₃) = 1 g/mol H + 14 g/mol N + (3 x 16 g/mol O) = 63 g/mol
Finally, we multiply the molarity by the molecular weight to obtain the grams of nitric acid per liter of solution:
0.75 mol/L HNO₃ x 63 g/mol = 47.27 g HNO₃
4. State at least three precautions followed during the gravimetric experiment.
Answers
1. Cleanliness
2. Precise weighing
3. Controlled environment
Explanation:
The gravimetric experiment is a technique used in analytical chemistry to determine the amount of a substance in a sample by measuring its mass. To ensure accurate and reliable results, several precautions are followed during the experiment, including:
1. Cleanliness: The equipment used in the experiment must be clean and free from any contaminants that may affect the measurements. This includes weighing boats, glassware, and other equipment.
2. Precise weighing: Accurate measurements are essential in gravimetric analysis. Therefore, it is essential to use precise weighing balances that are calibrated regularly and check for any external factors that may affect the measurements like vibrations.
3. Controlled environment: It is crucial to maintain a controlled environment during the experiment to minimize the effects of temperature, humidity, and other factors that may affect the measurements. This may include using a fume hood to prevent contamination by airborne particles or performing the experiment in a temperature-controlled room.
If 1.20 moles of copper react with mercuric nitrate, how many moles of mercury form? Cu + Hg(NO3)2 Cu(NO3)2 + Hg
I WILL GIVE Brainliest TO THE RIGHT ANSWER
Answers
Answer:
1.20 mole
Explanation:
1 Mole of Cu reacts to form = 1 Mole of Hg
(1.20 mol × 1 mol) ÷ 1 mol
1.20 mol of Hg
Choose the incorrect statement. Question 5 options: A reaction intermediate has fully formed bonds. A reaction intermediate is produced and used up during the reaction. An activated complex has partially formed bonds. A transition state and a reaction intermediate are the same.
Answers
Answer:
Option D) A transition state and a reaction intermediate are the same.
Explanation:
A transition state and a reaction intermediate are the not same. The transition state represents the highest energy in the steps of a reaction, whereas an intermediate, on the other hand, is represented by the lowest energy minimum in a reaction.
(WILL GIVE BRAINLIEST TO BEST ANSWER) What might a weak acid do to a rock?
Answers
When water combines with carbon dioxide in the atmosphere, it will form carbonic acid, which is a weak acid. If this weak acid comes in contact with a rock, it will cause some of the rock to be dissolved. This process can also be referred to as weathering.
An allele that is not dominant is know as what
Answers
Answer:
Recessive
Explanation:
Hope this help I think this is the right answer.
Relationship between number of valence of atom to the period table
Answers
The number of valence electrons in an atom is directly related to its position in the periodic table.
The periodic table is organized into periods (horizontal rows) and groups (vertical columns). Elements in the same group have the same number of valence electrons, which determines their chemical properties and reactivity. As you move from left to right across a period, the number of valence electrons increases from 1 to 8.
The periodic table provides a visual representation of how elements' electronic configurations relate to their chemical properties. Elements with the same number of valence electrons tend to exhibit similar chemical behaviors, and this is the reason why they are grouped together in the same column. Understanding the relationship between the number of valence electrons and an element's position in the periodic table allows us to predict its reactivity and bonding capabilities with other elements.
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is riding a bike or bus quicker way to get to school?
IV:_____________
DV:____________
Hypothesis:________________________________________________
Answers
for the oxidation of iron to form iron(iii)oxide
4Fe(s)+3O2(g)=2Fe2O3(s) deltaS^o=-549.73J×K^-1 at 298K
the enthalpy of formation of Fe2O3(s) is -824.2 kj×mol^-1. what is the standard change in gibbs free energy for this reaction at 298K? Delta G^o=delta H^o-T delta S^o
Answers
Answer:
only god knows the answer
The Gibbs free energy is given by the change in enthalpy, temperature, and change in entropy. The standard change in Gibbs free energy for oxidation of iron is –1484.6 kJ.
What is Gibbs free energy?Gibbs free energy is the energy present in a thermodynamic system that is used by the reactant to form a product. It is given as,
Δ G° = Δ H° -T ΔS°
The oxidation reaction of iron is given as,
4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
Given,
ΔS° = –549.73 J∙K⁻¹
T = 298 K
Δ H° = –824.2 kJ∙mol⁻¹
Substituting values above the Gibbs free energy is calculated as:
Δ G° = Δ H° -T ΔS°
= –824.2 kJ∙mol⁻¹ - 298 K ( –549.73 J∙K⁻¹)
= -1484580.46 J
The units of joules are converted into kilojoules and the standard change in Gibbs free energy will be –1484.6 kJ.
Therefore, –1484.6 kJ is the Gibbs free energy.
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What does (2.3 x 10^5 times 3.8 x 10^-8) divided by (2.56 x 10^9) equal?
1.5 x 10^-22
3.4 x 10^6
3.4 x 10^-12
3.4 x 10^4
Answers
\(3.4 \times {10}^{ - 12} \)
Multiply first and then divide
Describe what occurs when a metal is placed into an acid and the equation and what is occurring within it
Answers
When a metal is placed into an acid, a chemical reaction called a redox reaction occurs. In this process, the metal loses electrons (oxidation) and the acid gains electrons (reduction). This results in the formation of a salt and hydrogen gas is released. The general equation for this reaction is:
Metal + Acid → Salt + Hydrogen gas
For example, when zinc is placed into hydrochloric acid, the reaction is:
Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g)
In this reaction, zinc is oxidized to form zinc chloride (ZnCl₂) while hydrogen ions (H⁺) in the hydrochloric acid are reduced to form hydrogen gas (H₂).
The release of hydrogen gas can be observed as bubbles forming in the solution. This process demonstrates the reactivity of metals with acids, which depends on the metal's position in the reactivity series.
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A chemical reaction in which bonds are broken is usually associated with ________. a chemical reaction in which bonds are broken is usually associated with ________. the consumption of energy forming a larger molecule a synthesis the release of energy
Answers
Answer:The answer to the question is the release of energy. The bonds that bind a molecules atom's act as a storage of energy. One way it is released is when those bonds are broken and it is released outward in every direction. This breakage results in smaller molecules and not the formation of a larger molecule.
Explanation:
Bob rides his motorcycle with a constant speed of 116 km/h. How far can he travel in 1 hour?
Answers
Answer:
116 km/h
Explanation:
We know that km/h means Kilometers an hour. And if this is constant, then he will travel 116 km/h.
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Can a mixture of iron filings, water, and sand be separated and if so, from the choices, which is the best method?
1. Yes, a person can separate this mixture best using a small screen or strainer and magnet.
2. No, they form a solution and are unable to be separated.
3. No, it is impossible to separate any type of mixture that has a liquid in it.
4. Yes, a person can separate this mixture best by freezing it and letting the dense objects sink.
Answers
Answer:
1. Yes, a person can separate this mixture best using a small screen or strainer and magnet.
Explanation:
iron is magnetic
TRUE OR FALSE
- during all chemical reactions, the mass of the products is never equal to the mass of the reactants
- Mass is sometimes lost in chemical reactions
- The Law of Conservation of Mass states that mass is not conserved
Answers
During all chemical reactions, the mass of the products is never equal to the mass of the reactants.
- FALSE
Mass is sometimes lost in chemical reactions.
- FALSE
The Law of Conservation of Mass states that mass is not conserved.
- FALSE
11) Significant figures are important because they indicate
A) the accuracy of a measurement.
B) the number of digits on a calculator.
C) the number of measurements.
D) the precision of a measurement.
E) the accuracy of the conversion factor
Answers
Significant figures are important because they indicate the precision of a measurement.
Precision:
The precision of a substance is defined as the degree to which two or more measurements agree with one another. It is incredibly precise but not always accurate to measure something if you weigh it five times and get 3.2 kg each time. Accuracy is not necessary for precision. You can learn how to be accurate but not precise by looking at the examples below. There are various categories of precision:
Repeatability:
The fluctuation that results from taking multiple measurements under the same circumstances in a short amount of time.
Reproducibility:
The variation occurs when several instruments, operators, and longer time periods are used in the same measurement process.
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are there other universes ??
Answers
Answer:
Some theories say that there is only one universe and that everything is inside the universe and there is nothing outside the universe but some other theories say that there are more Universes which has the opposite copy of all the planets in our universe.
Fresh water is distributed blank in both time and space.
Answers
Answer:
unevenly
Explanation:
Fresh water is distributed unevenly in both time and space.
3 moles of sodium hydroxide (NaOH) are needed to prepare a solution. What mass of sodium hydroxide is required?
Answers
In this question, we have to find out how many grams of NaOH are in 3 moles of this compound, and the way to do that is by using its molar mass, 40g/mol, which means that in 1 mol of NaOH, we will have 40 grams, therefore, in 3 moles:
40g = 1 mol of NaOH
x grams = 3 moles of NaOH
x = 3 * 40
x = 120 grams of NaOH in 3 moles
What is the percent composition of nitrogen in a compound of lead (Il) nitride?
Answers
The percent composition of an element in a compound can be found by the following formula:
\(PercentComposition=\frac{AtomicMassElement}{MolarMassMolecule}\times100\%\)Therefore, we must first find the weight of the lead(II) nitride molecule. The molecular formula of lead (Il) nitride is Pb3N2, so the molar mass of the element will be:
Molar Mass Pb3N2= Atomic Mass Pb x 3 + Atomic Mass N x 2
the values of the atomic mass of the elements are found in the periodic table.
Atomic Mass Pb=207.2u
Atomic Mass N=14.0067u
So, the molar mass of Pb3N2 will be:
\(MolarMassPb_3N_2=207.2u\times3+14.0067\times2=649.6g/mol\)The percent composition of nitrogen in Pb3N2 will be:
\(\begin{gathered} PercentCompositionN_2=\frac{14.0067\times2}{649.6}\times100\% \\ PercentCompos\imaginaryI t\imaginaryI onN_2=\frac{28.0134}{649.6}\times100\operatorname{\%} \\ PercentCompos\imaginaryI t\imaginaryI onN_2=4.31\% \end{gathered}\)Answer: The percent composition of nitrogen in a compound of lead (Il) nitride is 4.31%
hello nice ppl(ɔ◔‿◔)ɔ ♥
Answers
Answer:
Hi
Explanation:
How has your brainly experience been so far? Are you liking?
Answer:
Thx you are sooo noice
Explanation:
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