The bonds in methane and ammonia are covalent.
Methane and ammonia are both covalent compounds. Methane is a hydrocarbon with a single carbon atom and four hydrogen atoms. The bond between carbon and hydrogen is covalent because both atoms share electrons to form a bond. Ammonia is a compound with a single nitrogen atom and three hydrogen atoms. Similarly, the bond between nitrogen and hydrogen is covalent because both atoms share electrons to form a bond.
Covalent bonds involve the sharing of electrons between atoms. In these types of bonds, the atoms form molecules with shared electron pairs. On the other hand, ionic bonds involve the transfer of electrons between atoms, forming ions that attract each other due to their opposite charges. In summary, the bonds in methane and ammonia are covalent because the electrons are shared between the atoms.
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If a solution has a temperature of 255 k, what is its temperature in degrees celsius?
If a solution has a temperature of 255 k, then its temperature in degrees Celsius is - 18 °C
The temperature is defined as ,
Temperature is the degree of hotness or coldness of a body, measured in degrees Fahrenheit or degrees Celsius.
Calculation ,
The temperature is converted from degree Celsius to kelvin as ,
Let suppose temperature = X °C
Then temperature in kelvin = X °C + 273 = ( X + 273 ) K
If a solution has a temperature = 255 K
Temperature in degrees Celsius = 255 K - 273 = - 18 °C
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if a bullet makes an oval shaped hole as it moves through glass, it entered the glass how? a. straight on b. at an angle c. from the top d. from the bottom
The correct option is b. at an angle; If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.
Explain the formation of oval-shaped hole?An oval resembles the form, contour, or shape of an egg.
Take a moment to picture yourself grabbing your favourite ball as well as squeezing it in your hands. You would observe an oval-shaped object. The uneven curves and strange, semi-round egg form of the ball would prevent it from rolling or throwing as smoothly if you were to maintain that shape.Every shape contains characteristics, such as the flat shapes that can detect and outline on an object, such as edges, corners, and faces.For instance:
A square has a square face, four sides, and four corners.Four sides, four corners, and a rectangle's face make up a rectangle.Thus, If a bullet passes through glass and leaves an oval-shaped hole, it entered the glass at an angle.
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7. A sample of a compound that contains only chlorine and oxygen reacts with excess hydrogen to produce 0.233 grams of hydrochloric acid and 0.403 grams of water. Determine the empirical formula of this compound.
Answer:
ClxOy + H2 > HCl + H2O
HCl = 0.233/37 = 0.006 mol H2O = 0.403/180.02 mol
HCl = 0.006/0.022 H2O = 0.022/0.006
= 1 = 4
Cl2O4 + 5H2 > 2HCl + 4H2O
I'm think that's the answer
Calculate the specific heat of an unknown metal if it took 58.1 J to increase the temperature of 89.4 g of the metal from 23.4°C to 25.5°C.
Answer:
\(c=0.309\ J/g^{\circ} C\)
Explanation:
The increase in heat, Q = 58.1 J
Mass, m = 89.4 g
The temperature increases from 23.4°C to 25.5°C. We need to find the specific heat of an unknown metal.
We know that the increase in heat is given by :
\(Q=mc\Delta T\\\\c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{58.1}{89.4\times (25.5-23.4)}\\\\c=0.309\ J/g^{\circ} C\)
So, the specific heat of an unknown metal is equal to \(0.309\ J/g^{\circ} C\).
Write out the chemical equations showing how a buffer solution made from H2PO4- and HPO42- would react to the addition of an acid (H+ ions) or a base (OH- ions).
Answer:
kindly check the explanation section.
Explanation:
The two ions given in the question above that is Dihydrogenphosphate, H2PO4- and HPO42- are so important when it concerns buffering. During intracellular pH balancing the ions that is H2PO4- and HPO42- reacts with OH⁻ and H⁺ respectively. The equation for the chemical reaction is given below for both ions.
H₂PO₄⁻ + OH⁻ < =====================================> HPO₄²⁻ + H₂O.
HPO₄²⁻ + H⁺ <===========================================> H₂PO₄⁻.
ATP, the energy used inside a cell, is created in the Ribosomes
?true or false?
Answer:
false
Explanation:
because its made in the mitochondria
in what category are the eicosanoids, based on chemical structure?
Eicosanoids are a subclass of oxylipins, which are oxidized fatty acids with a variety of carbon unit lengths. They differ from many other oxylipins by having a disproportionately large role as cells signaling molecules.
What exactly is eicosanoids and what tasks do they do?The lipid-based signaling molecules known as eicosanoids have a special function in innate immune responses. The many eicosanoids, including prostaglandins and leukotrienes, enable the immune cell cells to react to bacterial intruders quickly.
What kinds of substances are eicosanoids?The hormones (PG), thrombin (TX), thromboxanes (LT), and lipoxins are eicosanoids (LX). These substances can be categorized as autocrine/paracrine hormones because they virtually invariably affect the cells that make them or nearby cells, i.e., over small distances and times.
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URGENT PLEASEEEE
QUESTION 47 In the small intestine, chylomicrons are picked up by lacteals; simple sugars and amino acids directly enter the blood. O True False QUESTION 48 Cytosol is intracellular fluid; most extrac
47. True.In the small intestine, chylomicrons, which are large lipoprotein particles, are indeed picked up by lymphatic vessels called lacteals. Chylomicrons contain dietary fats (triglycerides) and are responsible for transporting these fats from the small intestine to the lymphatic system and eventually to the bloodstream.
On the other hand, simple sugars and amino acids, which result from the digestion of carbohydrates and proteins, respectively, are directly absorbed into the bloodstream through the small intestine's capillaries. They do not require the lymphatic system for transport and enter the blood directly.
48.True.Cytosol is indeed the intracellular fluid present within the cytoplasm of cells. It is a gel-like substance that surrounds the organelles and other cellular structures. Cytosol consists of water, ions, small molecules, and various proteins that are dissolved or suspended within it. It plays a crucial role in cellular metabolism, transport of molecules, and the overall functioning of the cell.
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The H-R diagram is useful in
studying all of these about a star
A.except for its brightness b.location in the sky c.temperature
D.magnitude
Answer:
b.location in the sky (If the question is saying:The H-R diagram is useful in
studying all of these about a star except for)
Explanation:
The theoretical HR diagram plots the temperature of the star vs their luminosity (brightness) and the observational HR diagram plots color of the stars vs the absolute magnitude. Depending on mass, stars will also go through specific evolutionary stages that can be seen through the location of the star on the HR diagram. However, the HR diagram will not have data on the location of the star in the sky.
2 of 4 examples as to why humans are the most dangerous creatures in the ocean
Answer
We kill animals and we are creul :)
Explanation:
Your welcome
Imagine our class has discovered a new element and named it Berkmarium. Berkmarium is known to have 3 naturally occurring isotopes. In nature, 70% of the element is Berkmarium-95, 28% is Berkmarium-97, and 2% is Berkmarium-94. Which isotope will the average atomic mass of Berkmarum be closest to, and why? Support your answer with a calculation.
Answer:
Detail is given below.
Explanation:
Given data;
Abundance of Berkmarium-95 = 70%
Abundance of Berkmarium-97 = 28%
Abundance of Berkmarium-94 = 2%
Average atomic mass closer to which isotope = ?
Solution:
1st of all we will calculate the average atomic mass of Berkmarium.
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (70×95)+(28×97)+(2×94) /100
Average atomic mass = 6650 + 2716+ 188 / 100
Average atomic mass= 9554 / 100
Average atomic mass = 95.54 amu
The average atomic mass is closer to the isotope Berkmarium-95 because it is present in abundance as compared to the other two isotope. So this isotope constitute most of the part of Berkmarium.
In Latin, the word arthropod means jointed foot.
Beside jointed legs and segmented body , what other characteristic is common to arthropods?
Answer: a pair of antennae
Explanation:
7. The mass of a sample of Co, is 91.72 g. How many molecules does it contain?
Answer:
9.370 x 10 to the 23 molecules
Explanation:
91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co
Answer:
Explanation:
Mass 1 mole of CO
C = 12
O = 16
m = 28
Mols of 91.72 grams
m = given Mass / Molar Mass
m = 91.72 / 28
m = 3.28 mols
Molecules
1 mol of anything is 6.02 * 10^23 molecules (in this case)
3.28 mol of CO = x
1/3.28 = 6.02*10^23/x Cross multiply
x = 3.28 * 6.02 * 10^23
x = 1.97 * 10^24
what is Pb+FeSO4-->PbSO4+Fe balanced and the type of reaction?
Answer:
It's simple substitution reaction and there is no balance for the equation. It's right written.
Explanation:
a compound forms a dense yellow precipitate when treated with iodine and sodium hydroxide. the compound must be:
A compound forms a dense yellow precipitate when treated with iodine and sodium hydroxide. the compound must be: Acetophenone methyl ketone.
Sodium hydroxide is every now and then known as caustic soda or lye. it's by far a common ingredient in cleaners and soaps. At room temperature, sodium hydroxide is white, odorless strong. Liquid sodium hydroxide is colorless and has no odor. it could react violently with strong acids and with water.
Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. it is a white stable ionic compound that includes sodium cations Na⁺ and hydroxide anions OH⁻.
Manufacturers may additionally use sodium hydroxide to provide soaps, rayon, paper, products that explode, dyes, and petroleum merchandise. different obligations which can use sodium hydroxide include processing cotton cloth, steel cleaning and processing, oxide coating, electroplating, and electrolytic extraction.
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Which is more reactive boron or neon
describe the different roles of electrons in the formation of ions in lithium chloride and covalent bonds in hydrogen chloride
Lithium Chloride: Lithium Chloride is an ionic compound, which means that the atoms are held together by electrostatic forces.
Roles of electrons in the formation of ions in lithium chloride and covalent bondsThe electrons in the outermost shell of the lithium atom are transferred to the chlorine atom, resulting in the formation of an ionic bond between the two atoms. The electrons that are transferred become part of the chlorine ion's electron cloud, giving it a negative charge.
The lithium atom now has fewer electrons than protons, giving it a positive charge and forming a Li+ ion. The chlorine atom now has more electrons than protons, giving it a negative charge and forming a Cl- ion.
Hydrogen Chloride: Hydrogen Chloride is a covalent compound, which means that the atoms are held together by sharing electrons. In the case of hydrogen chloride, the hydrogen atom shares its electron with the chlorine atom, resulting in the formation of a covalent bond between the two atoms. The shared electron is part of both the hydrogen and chlorine atom's electron clouds, forming a neutral H-Cl molecule.
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Consider the unbalanced chemical equation HBr + B = BBr3 + H2. When
coefficients are added to balance the equation, which two substances will
have a coefficient of 2?
D A. H2
B. HBr
C. BBrg
D D B
Answer:
B and BBr3
Explanation:
1) 3HBr + B = BBr3 + H2 (double all equation because H2)
2) 6HBr + 2B = 2BBr3 + 3H2
(?)Li2O + (?)H2O → (?)LiOH
Answer:
Li2O+H2O---->(2)LiOH
Explanation:
you have to balance the equation and not all the blanks have to be filled all the time but if it makes it easier for you in the first 2 question marks you can put a 1 which isnt necessary but if ur a visual person it will help.
hope this helps im litterally learning the same thing as u lol
Answer:
1,1,2
Explanation:
this was correct for me, if it wasnt correct check if youre on the right question
Chemical energy from food is converted to another form of chemical energy called ____ in the mitochondria.
Chemical energy from food is converted to another form of chemical energy called ATP (adenosine triphosphate) in the mitochondria.
ATP is composed of three phosphate groups attached to an adenosine molecule. When one of these phosphate groups is broken off, a large amount of energy is released. This energy is used by cells to carry out various functions, such as muscle contraction, active transport, and synthesis of molecules.
Overall, the conversion of chemical energy from food to ATP in the mitochondria is a complex process that involves the breakdown of glucose and the transfer of energy-rich electrons. ATP serves as the main source of energy for cellular processes, allowing cells to carry out their functions efficiently.
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Identify the principle of separation.
i. raw rice and lentils
ii. sulphur and iron filings
ii. sand and sawdust
iv. oil and water
v. ammonium chloride, salt and sand
Explanation:
I. husking
ii. use magnet
III. husking
iv. floatation
v. Fractional distillation
Consider the following rate law: Rate = k[B]
Which of the following equations could be used to find the concentration of B at some time (t) in the reaction?
A) [B]=[B] 0 - kt
B) [B]=[B] 0e ^ (- k * t)
C) 1 / [B] = 1 / [B] + 2kt
D) All of the above
Rate = k[B]. The equation that could be used to find the concentration of B at some time (t) in the reaction is B) [B]=[B]0e^(-k*t). [B]=[B]0e^(-k*t).Given that the rate law is Rate = k[B].The integrated rate law for first-order reactions is:
[A] = [A]0e^(-kt)The concentration of B at time (t) can be calculated using the above equation:[B] = [B]0e^(-kt) = [B]0e^(-k*t)Therefore, the equation that could be used to find the concentration of B at some time (t) in the reaction is [B]=[B]0e^(-k*t).
. The other options don't give the correct expression to calculate the concentration of B at time (t) in the given reaction. Therefore, the correct answer is option B.
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2Al(s) + Fe₂O3(s) → Al₂O3(s) + 2Fe(s)
ΔΗ = −847 kJ
Railroad maintenance initiates a
thermite reaction of 4.0 mol Al to connect
two lengths of rail using the reaction
above. How much heat is released
during the reaction?
9rxn = [ ? ] kJ
The heat released during the reaction is -212 kJ. Heat is a fundamental concept in physics, chemistry, and engineering and plays a critical role in many natural phenomena, such as thermodynamics, phase transitions, and thermal radiation.
What is Heat?
Heat is a form of energy that can be transferred from one object to another as a result of a difference in temperature. Heat flows from hotter objects to colder objects until they reach thermal equilibrium, meaning that their temperatures become equal. The amount of heat transferred is typically measured in joules (J) or calories (cal) and is related to the mass of the object, the specific heat capacity of the material, and the temperature change experienced.
The ΔH for the reaction is -847 kJ.
The stoichiometric coefficient of Al in the balanced equation is 2. This means that 2 moles of Al are required to produce 2 moles of Fe and 1 mole of \(Al_{2} O^{3}\).
Since the reaction uses 4.0 mol of Al, it will produce 2.0 mol of Fe and 1.0 mol of \(Al_{2} O^{3}\).
The amount of heat released during the reaction can be calculated using the equation:
ΔH = q/n
where ΔH is the enthalpy change, q is the heat released, and n is the number of moles of the limiting reactant (in this case, Al).
Substituting the values gives:
ΔH = (-847 kJ) / 4.0 mol = -212 kJ/mol
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Place The Following In Order Of Decreasing IE1 Cs Mg Ar A) Cs > Mg > Ar B) Ar > Mg > Cs C) Mg > Ar> Cs D) Mg > Cs> Ar E) Cs> Ar > Mg
The trend of ionization energy moving from left to right and from bottom to top can be observed. The order of decreasing first ionization energy is to be placed for the given elements Cs, Mg, and Ar.
The ionization energy (IE) is the energy required to remove an electron from a neutral gaseous atom or ion in the gaseous phase.
The ionization energy increases as you travel from left to right and bottom to top across the periodic table.Therefore, the correct order of decreasing ionization energy is as follows:
Ar > Mg > Cs
The correct option is (B). Ar has the highest IE, followed by Mg, and then Cs.
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What happens to water at 1 atm pressure as the temperature is decreased from 10°C to –10°C?
Answer:
The water freezes and becomes solid ice
Answer:
See below
Explanation:
Water freezes at 0 C
so the water will give up heat to become 0 C water
then it will give up more heat to become 0 C ice
then it will give up even more heat to become -10 C ice
A coffee cup calorimeter with a heat capacity of 6. 70 J/∘ C was used to measure the change in enthalpy of a precipitation reaction. A 50. 0 mL solution of 0. 360 M AgNO3 was mixed with 50. 0 mL of 0. 540 M KSCN. After mixing, the temperature was observed to increase by 4. 06∘C. Calculate the enthalpy of reaction, ΔHrxn, per mole of precipitate formed (AgSCN). Assume the specific heat of the product solution is 4. 11 J / (g⋅∘C) and that the density of both the reactant solutions is 1. 00 g/mL. Calculate the theoretical moles of precipitate formed from AgNO3 and KSCN. Moles of precipitate formed from AgNO3: mol moles of precipitate formed from KSCN: mol Calculate the heat change experienced by the calorimeter contents, ????contents. ????contents= J Calculate the heat change expierenced by the calorimeter contents, ????cal. ????cal= J Calculate the heat change produced by the solution process, ????solution. ????solution= J Calulate ΔHsolution for one mole of precipitate formed. ΔHsolution= kJ/mole
A coffee cup temperature with a heat capacity of 6. 70 J/∘ C was used to measure the change in enthalpy of a precipitation reaction.The value of ΔHrxn was found to be 61.9 kJ/mol.
Calculate the enthalpy of reaction, ΔHrxn, per mole of precipitate formed (AgSCN). Assume the specific heat of the product solution is 4. 11 J / (g⋅∘C) and that the density of both the reactant solutions is 1. 00 g/mL.1. Calculation of Moles of precipitate formed from AgNO3:To find the value of ΔHrxn, we used the formula ΔHrxn = Qsolution/n, where Qsolution is the heat change produced by the solution process and n is the number of moles of AgSCN formed.
To find the value of n, we first calculated the number of moles of AgNO3 and KSCN used in the reaction using the formula n = M × V.To find the heat change produced by the solution process, we used the formula
Q = m × c × ∆T,
where Q is the heat change, m is the mass of the product solution, c is the specific heat capacity of the product solution, and ∆T is the change in temperature of the solution.The value of ΔHrxn was found to be 61.9 kJ/mol.
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Calculate the percentage of HF molecules ionized in a 0.10 M HF solution. The Ka of HF is 6.8 x 10-4
The percentage of HF molecules ionized in a 0.10 M HF solution is 26%.
The dissociation of HF in water is represented by the chemical equation:
HF(aq) + H₂O(l) ↔ H₃O+(aq) + F-(aq)
The equilibrium constant expression for this reaction is:
Ka = [H₃o⁺][F-] / [HF]
where [H₃o⁺] is the concentration of hydronium ions, [F-] is the concentration of fluoride ions, and [HF] is the concentration of undissociated HF.
We are given that the initial concentration of HF is 0.10 M, and the value of Ka is \(6.8 x 10^-4.\)
Let x be the extent of ionization, which is the concentration of H₃O+ and F- ions formed at equilibrium. Then, the equilibrium concentrations can be expressed as follows:
[H₃O+] = x
[F-] = x
[HF] = 0.10 - x
Substituting these expressions into the equilibrium constant expression, we get:
\(6.8 x 10^-4 = x^2 / (0.10 - x)\)
Solving for x using the quadratic formula, we get:
x = 0.026 M
The percentage of HF molecules ionized can be calculated as:
% ionization = (moles of HF ionized / initial moles of HF) x 100%
= [(0.026 mol/L) / (0.10 mol/L)] x 100%
= 26%
Therefore, the percentage of HF molecules ionized in a 0.10 M HF solution is 26%.
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Does changing the concentration of reactants in a chemical reaction affect the activation energy of the reaction? If it does, why?
Explanation:
For a chemical reaction to occur, there must be a certain number of molecules with energies equal to or greater than the activation energy. With an increase in concentration, the number of molecules with the minimum required energy will increase, and therefore the rate of the reaction will increase.
The pressure of a gas in a cylinder when it is heated to a temperature of 250k is 1.5 atm. What was the initial temperature of the gas if it’s initial pressure was 1 atm?
Answer:
\(T1=166.66K\)
Explanation:
According to Gay-Lussac’s law simply states that the ratio of the initial pressure and temperature is equal to the ratio of the final pressure and temperature for a gas of a fixed provided that the mass is kept at a constant volume.
Given:
Initial pressure, P1 = 1 atm
Final pressure, P2 = 1.5 atm
Final temperature, T2 = 250 K
The law can be applied using the below formula
P1T2 = P2T1
Then,
T1 = (P1T2)/P1 = (1*250)/(1.5) = 166.66 Kelvin.
\(T1=166.66K\)
:
Answer:
\(T_1=166.7K\)
Explanation:
Hello,
In this case, by applying the Gay-Lussac's law which help us to understand the pressure-temperature gas behavior via a directly proportional relationship:
\(\frac{P_1}{T_1} =\frac{P_2}{T_2}\)
In such a way, as we are asked to compute the initial temperature knowing the initial pressure and final both temperature and pressure, so we solve for it:
\(T_1=\frac{T_2P_1}{P_2}=\frac{250K*1atm}{1.5atm} \\\\T_1=166.7K\)
Best regards.
If 12.52mol of aluminum metal is reacted with2.38mol of iron (III) oxide, how many particles, inmoles of iron metal are likely to form?Reaction: 2Al(s) + Fe₂O3(aq)--> Al2O3(aq) + 2Fe(s)
Answer
4.76 mol Fe
Procedure
Consider the following balanced equation and determine the limiting reagent using the coefficients method
2Al(s) + Fe₂O3(aq)--> Al2O3(aq) + 2Fe(s)
\(12.52\text{ mol Al}\frac{2\text{ mol Fe}}{2\text{ mol Al}}=12.52\text{ mol Fe}\)\(2.38\text{ mol Fe}_2\text{O}_3\frac{2\text{ mol Fe}}{1\text{ mol Fe}_2\text{O}_3}=4.76\text{ mol Fe}\)The lowest amount is the one produced by the iron (III) oxide therefore that is the limiting reagent and 4.76 mol of Fe is the max amount that can be produced of Iron.