A) most reactions involve bond breaking and bond making. this equation shows what happens when methane (ch4) burns in oxygen (o2). mark the bonds broken in blue and the bonds formed in red.\
Answers
When CH₄ burns with the presence of O₂, CO₂ and H₂O are formed as the products. The balanced equation is;
CH₄ + 2O₂ → CO₂ + 2H₂O
When the reaction happens, 4 C-H bonds of CH₄ and O=O bond of O₂ are broken down to form 2 C=O bonds in CO₂ and 2 O-H bonds in H₂O.
The broken and formed bonds are marked in the image.
Related Questions
What is defined as the absorption of oxygen and the release of carbon dioxide by cells?
Answers
Answer:
Cellular respiration
Explanation:
Oxygen is required by the cell in the Krebs cycle as the ultimate proton acceptor (creating water an end product during making out ATPs). During the conversion of pyruvate from glycolysis to Acetyl-CoA that enters the Krebs cycle, the pyruvate is decarboxylated (or oxidized) hence creating carbon IV oxide as a byproduct.
In the third period of the periodic table sodium is followed by magnesium aluminum silicon and phosphorus which of these elements has the smallest atomic size ?
Answers
Phosphorous has the smallest atomic size.
Explanation:
As we know these elements belong to same period means there valence shell is the same. So moving from left to right along the period the shell number remains constant but the number of protons and electrons increases. So, due to increase in number of protons the nuclear charge increases hence attracts the valence electrons more effectively resulting in the decrease of atomic size.
Elements and their atomic radius are as follow,
Magnesium 0.160 nm
Aluminium 0.130 nm
Silicon 0.118 nm
Phosphorus 0.110 nm
How many unshared pairs of electrons does the nitrogen atom in ammonia possess?
Answers
Step 1: Calculate number of Total valence Electrons:
# of Valence e⁻s in N = 5
# of Valence e⁻s in H₁ = 1
# of Valence e⁻s in H₂ = 1
# of Valence e⁻s in H₃ = 1
---------------
Total Valence e⁻s = 8
Step 2: Start drawing the structure:
Draw Central atom (N) in center surrounded by three H atoms. Connect N with each H atom through single bond and subtract e elctrons from total valence electrons for each single bon. Therefore, for three single bonds, 6 electrons are subtracted. i.e.
= 8 - 6
= 2
These two electrons left are added to N atom as a lone pair of electron.
Result:
Nitrogen atom in Ammonia possess 2 (two) unshared electrons marked as red in given picture.
The nitrogen atom in an ammonia molecule has one lone pair of electrons.
The nitrogen atom in an ammonia molecule (NH₃) has five valence electrons. According to its Lewis structure, nitrogen forms three covalent bonds with three hydrogen atoms. Each hydrogen atom donates one electron, filling its valence shell.
Nitrogen uses three of its five valence electrons in these bonds, resulting in three bonding pairs shared between nitrogen and hydrogen. The remaining two valence electrons on the nitrogen atom do not participate in bonding and are thus termed an unshared pair or a lone pair.
Therefore, the nitrogen atom in ammonia possesses one lone pair of electrons.
What is a reaction with a positive enthaply spontaneous
Answers
Why does inhaled air need to be warmed filtered and moistened?
Answers
Inhaled air is warmed, filtered, and moistened to protect the respiratory system from damage caused by cold, dry, and particulate-laden air. These processes maintain respiratory health by equilibrating the inhaled air to body conditions and acting as protective mechanisms against infection and irritation to the lungs and trachea.
Inhaled air needs to be warmed, filtered, and moistened as part of the respiratory process in mammals. When air is inhaled through the nasal cavity, it is warmed to body temperature, which helps in reducing the shock to the system that cold air might cause. The air is then humidified by picking up water from the mucus lining the respiratory tract, which serves to equilibrate the air to the body's conditions. This humidification is crucial as it prevents the dryness that could damage the delicate tissues within the respiratory system. Furthermore, as the air passes through the nasal passages, particulate matter is trapped by hairs, mucus, and cilia, effectively filtering out potential irritants or harmful substances. These processes collectively prevent damage to the trachea and lungs, serving as important protective mechanisms to maintain respiratory health. Moreover, this filtering also plays a role in warding off infection, which along with the warming and moistening actions, decreases sensitivity during breathing and prevents damage to the lungs.
If 65.1L of N2(g) is needed to properly inflate an airbag, how many grams of NaN3(s) are needed for the reaction
Answers
2 NaN₂ (s) → 2 Na (s) + 3 N₂ (g)
According to equation,
67.2 L N₂ (3 moles) is produced by = 102 g (2 moles) NaN₂
So,
65.1 L N₂ will be produced by = X g of NaN₂
Solving for X,
X = (102 g × 65.1 L) ÷ 67.2
X = 98.81 g of NaN₂
Result:
98.81 g of NaN₂ is required to produce 65.1 L N₂ to inflate airbag.
Which or the following solutions would have the highest concentration of hydronium ion and why?
A)1.0×10^-3 M HCl
B)1.0×10^-3 M HC2 H3 O2
C)0.050 M HCl
D)0.050 M HC2 H3 O2
(I already know that the answer is C I just don't know why)
Answers
Chemical reaction 1: HCl(aq) + H₂O(l) → H₃O⁺(aq) + Cl⁻(aq).
Chemical reaction 2: CH₃COOH(aq) + H₂O(l) ⇄ H₃O⁺(aq) + CH₃COO⁻(aq).
Hydrochloric acid (HCl) is strong acid, which means that concencentration of hydronium ions are equal as concentration of hydrochloric acid:
A) c(HCl) = c(H₃O⁺) = 0.001 M.
C) c(HCl) = c(H₃O⁺) = 0.050 M is greater than A.
Acetic acid (CH₃COOH) is weak acid and does not dissociate completely as HCl, so concentration of hydronium ion in this solutions are very low.
A rock contains uranium 238 which has a half life of 4.5 billion years. if the rock is crushed and heated, the half life in urainium-238 will
Answers
Crushing and heating a rock containing uranium-238 does not change its half-life, which remains 4.5 billion years.
The half-life of a radioactive isotope like uranium-238 is the time it takes for half of its atoms to decay into another element.
For uranium-238, this duration is 4.5 billion years.If a rock containing uranium-238 is crushed and heated, the half-life of the uranium-238 will remain the same.This is because the half-life is a fundamental property of the radioactive nucleus and is not affected by external conditions like crushing or heating.To summarize, the process of crushing and heating the rock does not alter the radioactive decay process or the half-life of uranium-238, which will remain constant at 4.5 billion years.
Which formula shown is incorrect for the name given? Which formula shown is incorrect for the name given? calcium nitrate: Ca(NO3)2 ammonium cyanide: NH4CN strontium carbonate: SrCO3 potassium acetate: KC2H3O2 lithium sulfate: LiSO4
Answers
Answer:
5.Lithium sulfate:[tex]LiSO_4[/tex]
Explanation:
We have to find the formula which is incorrect for the name given
1.Calcium nitrate :[tex]Ca(NO_3)_2[/tex]
We know that Charge on calcium ion =+2
Charge on nitrate ion=-1
Therefore, the formula of calcium nitrate is [tex]Ca(NO_3)_2[/tex].
Hence, it is true.
2.Ammonium cyanide:[tex]NH_4CN[/tex]
Charge on ammonium ion=+1
Charge on cyanide ion=-1
Therefore, the formula of ammonium cyanide is [tex]NH_4CN[/tex].
Hence, it is true.
3.Strontium carbonate :[tex]SrCO_3[/tex]
Charge on strontium ion=+2
Charge on carbonate ion=-2
Therefore, the formula of strontium carbonate is [tex]SrCO_3[/tex].
Hence, option is true.
4.Potassium acetate:[tex]KC_2H_3O_2[/tex]
Charge on potassium ion=+1
Charge on acetate ion=-1
Therefore , the formula of potassium acetate is [tex]KC_2H_3O_2[/tex].
Hence, option is true.
5.Lithium sulfate:[tex]LiSO_4[/tex]
Charge on lithium ion=+1
Charge on sulfate ion=-2
Therefore, the formula of lithium sulfate is [tex]Li_2SO_4[/tex].
But given formula is [tex]LiSO_4[/tex].
Hence, option is false.
Consider the rate below
R=K(L)^2(XY)
What is the overall order of the reactants in this reaction? 0 1 2 3
Answers
The rate expression given is,
Rate = k [L]² [XY]
So,
The sum of exponents is,
2 + 1 = 3
It is a third order reaction, provided it is second order with respect to concentration of L and first order with respect to concentration of XY.
Result:
It is 3rd Order Reaction.
What will most likely happen if a sound wave moves from the air through a solid?
Answers
Answer:
D
Explanation:
YOUR WELCOME
describe the difference between a monoprotic acid and a triprotic acid. How does a triprotic acid generate hydrogen ions?
Answers
Monoprotic acids contain one ionizable hydrogen atom, while triprotic acids contain three ionizable hydrogen atoms. Triprotic acids, like phosphoric acid, generate hydrogen ions through stepwise ionization reactions.
Explanation:A monoprotic acid is an acid that contains only one ionizable hydrogen. Examples of monoprotic acids include hydrochloric acid (HCl) and acetic acid (CH3COOH). On the other hand, a triprotic acid is an acid that contains three ionizable hydrogens. An example of a triprotic acid is phosphoric acid (H3PO4).
When a triprotic acid like phosphoric acid dissociates, it releases hydrogen ions (H+) in a stepwise manner. The acid goes through a series of ionization reactions, each removing one proton. For example, phosphoric acid first donates one hydrogen ion (H+) to form dihydrogen phosphate ion (H2PO4-), then donates a second hydrogen ion to form hydrogen phosphate ion (HPO42-), and finally donates the third hydrogen ion to form phosphate ion (PO43-).
NEED HELP FAST, THANKS!
What is the distance between two consecutive troughs called? A. period length B. trough length C. amplitude length D. wavelength
Answers
Which is a characteristic of unsaturated fats?
A_They come from plant steroids.
B_They make up most animal fats.
C_They are liquids at room temperature.
D_They easily stack on top of each other.
Answers
Saturated fats are solid at room temperature, while unsaturated fats are liquid at room temperature.
Calculate the number of moles of naoh present in 11.2 ml of 2.50 m naoh solution
Answers
The volume of the solution is 11.2 milliliters, which is 0.0112 liters (multiply 11.2 mL with 1 L / 1000 mL to get 0.0112).
The molar concentration is 2.5 M. This means that there are 2.5 moles of NaOH per liter in the solution.
Multiply the volume and the molar concentration to get the moles of NaOH in the solution.
[tex]\text{moles of NaOH} = 0.0112 \: \text{Liter} \times \dfrac{2.5 \: \text{moles}}{1 \: \text{Liter}}[/tex]
The "Liter" will cancel out, leaving only moles.
After using a calculator (or computing by hand), you should get the following value:
[tex]0.028 \: \text{moles}[/tex]
Since the given values were given with 3 significant figures, let's change this answer so there are 3 significant figures.
Thus, your final answer is [tex]0.0280 \: \text{moles}[/tex]
Answer:
0.028 moles
Explanation:
you'll never delete me !!
What is the molecular formula of a compound whose molar mass is 88 and whose percent composition is 54.5% carbon, 9.1% hydrogen, and 36.4% oxygen?
Answers
we can first find the empirical formula. empirical formula is the simplest ratio of whole number of elements in the compound .
for 100 g of compound
C H O
mass 54.5 g 9.1 g 36.4 g
number of moles 54.5 g/12 g/mol 9.1 g/1 g/mol 36.4 g / 16 g/mol
= 4.54 mol = 9.1 mol = 2.28 mol
divide by the least number of moles
4.54 / 2.28 =1.99 9.1/2.28=3.99 2.28/2.28 = 1
numbers rounded off
C - 2
H - 4
O - 1
empirical formula - C₂H₄O
mass of empirical formula - (12*2) + (4*1) + (1*16) = 44
mass of molecular formula - 88 g/mol
number of empirical units - 88 g/mol / 44 = 2
there are 2 empirical units
molecular formula - 2 (C₂H₄O)
molecular formua - C₄H₈O₂
Answer:
C₄H₈O₂
Explanation:
Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom?
Answers
Ernest Rutherford was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom.
What are atomic models?There are some models that are used to explain the arrangements of subatomic particles inside the atom based on the atomic theory of atoms known as the atomic models.
There are many types of atomic models proposed in past based on their individual assumptions and the experimentations
Rutherford's discovery demonstrated that the majority of an atom is essentially blank space and that the center only takes up a very small portion of the entire atom, which had an impact on Thomson's commonly accepted atomic model.
Thus, Ernest Rutherford was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom.
Learn more about the atomic models here,
brainly.com/question/9145431
#SPJ2
Identify the atom represented by this electron configuration and elaborate on its bonding properties.
1s22s22p63s23p64s23d5
A) .Chromium is a transition with a half full-valence orbital and can form up to six bonds. B) Antimony is a metalloid that can form five covalent bonds or three metallic bonds. C) Manganese is a transition metal that can form up to five stable ionic bonds D) Bromine is a non-metal that forms one ionic bond or a variable number of covalent bonds.
Answers
The given electronic configuration represents Manganese.
Explanation:
The given electronic configuration is....
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁵
As the valence shell is 4 in electronic configuration so it is present in 4rth period in periodic table. And according to definition of transition elements, transition elements has partially filled d-orbital. i.e.
(n - 1)d
As, n = 4
So,
(4 - 1)d
3d
So tracking 4rth period, we found Mn with given electronic configuration.
Also,
"Manganese is a transition metal that can form up to five stable ionic bonds". It means that the five electrons present in d-orbital are transferred and Mn converts into Mn⁺⁵.
The electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵ represents the element Chromium (Cr), a transition metal with a notably stable half-filled 3d subshell. Chromium can undergo hybridization and is capable of forming complex ions, including the ability to form up to six bonds in certain complexes. Option A is correct .
The electron configuration given is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵ which corresponds to the element Chromium (Cr). Chromium tends to have exceptions to predicted electron configurations due to enhanced stability associated with half-filled or completely filled subshells.
The presence of a half-filled 3d subshell alongside a singly occupied 4s orbital is more stable than expected configurations. As for bonding properties, Chromium is a transition metal known for its ability to exhibit variable oxidation states and form complex ions, primarily through its valence electrons in the 3d and 4s orbitals.
When forming bonds, it is common for transition metals like Chromium to undergo hybridization, combining their s, p, and d orbitals to form new hybrid orbitals that can result in different geometries and bonding capabilities.
For instance, the hybridization can result in d²sp³ hybrid orbitals, which can form octahedral complexes with ligands. In the case of Chromium (III), which has an electron configuration of 3d³ after losing its 4s electron and two 3d electrons, it can form up to six bonds, as seen in complexes such as the octahedral hexaamminechromium (III) cation.
Atoms that have a positive or negative electrical charge are called ________.
A. magnetic
B. isotopes
C. metals
D. ions
Answers
Answer: ions
Explanation:
If the partial pressure of carbon dioxide gas in a blood capillary is 45 mm hg, what is the pressure expressed in inches of mercury? 0.059 in. hg 1.8 in. hg 4.5 in. hg 1,100 in. hg 0.87 in. hg
Answers
in. Hg - inches of mercury
mm Hg - millimetres of mercury
1 mm Hg is equivalent to 0.0394 in. Hg
therefore 45 mm Hg is equal to 0.0394 in.Hg/mm Hg x 45 mm Hg = 1.8 in. Hg
correct answer is B - 1.8 in. hg
In the reaction 2co(g) + o2(g) â 2co2(g), what is the ratio of moles of oxygen used to moles of co2 produced? select one:
Answers
2 mol CO 1 mol O2 2 mol CO2
1 mole O2 to 2 moles CO2, or
1 mole O2 : 2 moles CO2.
Draw the electron dot formula for the hypochlorite ion, clo-. how many nonbonding electron pairs are in a hypochlorite ion? 1 6 7 2 none of the above
Answers
There are 6 nonbonding electron pairs are in a hypochlorite ion.
Explanation:
Lewis structure of ClO⁻ is drawn as,
1) Add valence electrons of both elements along with additional one electron present in the form of negative charge on molecular ion, so,
Valence e⁻ of Cl = 7
Valence e⁻ of O = 6
e⁻ for negative charge = 1
------------
Total e⁻ 14
2) Draw both elements and connect them by single bond, and subtract 2 electrons from total valence electrons,
So,
14 - 2 = 12
Now distribute remaining 12 electrons on both element in order to complete their octet.
Result:
Each element gets three lone pair of electrons which are not involed in bonding. Therefore, overall 6 nonbonding electron pairs are present on ClO⁻ ion.
Write a nuclear reaction for the neutron-induced fission of u?235 to produce te?137 and zr?97. how many neutrons are produced in the reaction?
Answers
n₁ + U²³⁵ = Te¹³⁷ + Zr ⁹⁷ + xn1 ( n1 to mean a neutron of mass 1)
To balance the masses on both sides of the equation;
1 + 235 = 137 +97+ x
x = 2
the end reaction will be
n₁ +U²³⁵ = Te¹³⁷ + Zr⁹⁷ + 2 n₁
which element is in the same "family" as chlorine (Cl) and fluorine (F)?
a. bromine (Br)
b. oxygen (o)
c. hydrogen (h)
d. lithium (Li)
Answers
__________________________________________________
Note: "bromine" (Br) ; "chlorine" (Cl) ; and "fluorine" belong in the "halogen" family.
___________________________________________________Refer to the Period Table of Elements (shown below).
The vertical "columns" are referred to as: "groups"; or, "families". Refer to the "halogens"; or "halogen family" — circled in "black-color"; as follows:___________________________________________________
Bromine (Br) is in the same halogen family as chlorine (Cl) and fluorine (F) because they share similar chemical properties and have the same number of valence electrons. Option A is correct .
The element that is in the same 'family' as chlorine (Cl) and fluorine (F) is bromine (Br). These elements are part of the halogen family in the periodic table. Halogens are found in Group 17, and they share similar chemical properties, such as high reactivity and the tendency to form salts with metals.
For clarification, elements in the same group or family have the same number of valence electrons, which contributes to their similar chemical behavior. Bromine, like chlorine and fluorine, has seven valence electrons and forms similar types of compounds.
Oxygen (O), hydrogen (H), and lithium (Li) belong to different families: oxygen is a chalcogen, hydrogen is often placed in its own group due to its unique properties, and lithium is an alkali metal. Option A is correct .
NEED ASAP
Analyze the shape of H2O.
What is the shape of the H2O molecule?
Is it symmetrical?
Does this mean that the H2O molecule is polar or nonpolar?
Answers
Answer:
The answers are in the explanation.
Explanation:
Analyze the form of H2O: The water molecule is composed of an oxygen atom, linked to two hydrogen atoms. The oxygen atom shares one pair of electrons with each hydrogen atom, leaving two pairs of free electrons in the oxygen without sharing.
What is the shape of the H2O molecule? The pairs of unshared electrons exert a repulsion, so the molecule acquires the angular shape.
Is it symmetrical? The H2O molecule is asymmetric due to free electron pairs.
Does this mean that the H2O molecule is polar or non-polar? Does this mean that the molecule is polar, as the uneven distribution of electrons gives it a slightly negative charge near the oxygen atom and a slightly positive charge near the hydrogen atoms.
Have a nice day!
The H2O molecule looks like a bent or V-shaped. This is made up of two hydrogen atoms connected to a middle oxygen atom.
The H2O molecule is not symmetrical due to the lone pairs on the central oxygen atom.
The H2O molecule is polar due to the bent shape and unequal distribution of electron density.
What is the shape of the H2O molecule?This arrangement makes the molecule have a curved shape. The H-O-H bond is polar because the oxygen and hydrogen have different attraction strengths.
However, the bent shape of the molecule creates an overall polarity. In water (H2O), the oxygen atom has a stronger pull on the shared electrons compared to the hydrogen atoms. This makes the oxygen atom attract the electrons closer to itself. As a result, one end of the molecule has a little bit more negative charge, while the other ends have a little bit more positive charges.
Read more about H2O here:
https://brainly.com/question/1313076
#SPJ6
If less than 1% of ethanoic acid is ionized in an instant, ethanoic acid is considered a __________ acid. hydrochloric weak strong sulfuric
Answers
Ethanoic (acetic) acid ionization: CH₃COOH(aq) ⇄ CH₃COO⁻(aq) + H⁺(aq).
In water ethanoic acid is mainly in CH₃COOH form, only 1% in CH₃COOH and H⁺ ions, because it gives little hydrogen ions, this acid is considered weak monoprotic acid.
In aqueous solution, acetic acid has a pKa value of 4.76.
Potassium chloride (KCl) is sometimes used to treat low blood potassium levels. Calculate the concentration of a saturated solution of potassium chloride at 20°C. Question continued-?
Hint: The formula for molarity, a common concentration unit, is M = moles/volume of solution expressed in units of mol/L. You will need to convert from grams of KCl to moles. Assume the volume of solution is 100 mL. Show your work!
Info: 36g of KCl is the max 100mL of water could hold at 20°C.
Answers
Mathematically, molarity is expressed as [tex] \frac{\text{mass of solute(g)}}{\text{gram molecular weight X Volume of solution (l)}} [/tex]
In present case,
mass of solute (KCl) = 36 g
molecular weight of KCl = 74.55 g/mol
volume of solution = 100 ml = 0.1 l
∴ Molarity = [tex] \frac{36}{74.55X0.1} [/tex]
= 4.829 M
Thus, conc. of saturated KCl at 20 oC is 4.829 M
Which carbohydrate provides energy for cows but only dietary fiber for humans?
A-cellulose
B-starch
C-glycogen
D-sucrose
Answers
A - Cellulose
Take care ^-^
An oxidation reaction occurs only in the presence of _____.
Answers
Final answer:
An oxidation reaction requires the presence of an oxidizing agent.
Explanation:
Oxidation reaction are part of a larger set of reactions known as oxidation-reduction reactions, which involve the transfer of electrons. The term 'oxidation' itself originally referred to reactions involving molecular oxygen a key factor in these processes. However, the concept has broadened over time to cover any reaction where there is a loss of electrons, leading to an increase in the oxidation state of an element.
For example, compounds of elements in high oxidation states tend to act as oxidants and become reduced in chemical reactions. Every oxidation must be accompanied by a reduction. In chemical terms, the reducing agent is the species being oxidized because it loses electrons, whereas the oxidizing agent is the species being reduced, as it gains those electrons.
Which phrase describes an al atom?
a.a negatively charged nucleus, surrounded by negatively charged electrons
b.a negatively charged nucleus, surrounded by positively charged electrons?
Answers
None of the given options describe any atom. The phrase which describe an atom is "a positively charged nucleus surrounded by negatively charged electrons".
Explanation:
Atom is a smallest indivisible particle which is made up of many sub particles. The main sub particles are Protons, Neutrons and Electrons. Protons are positively charged, neutrons doesn't carry any charge hence neutral and electrons are negatively charged. Protons and neutrons are present in nucleus, therefore making the nucleus positively charged, while, electrons revolve around the nucleus in orbit hence being negatively charged particles surrounds the positively charged nucleus.
An atom is defined as the microscopic particle having positively charged nucleus around which negatively charged electrons revolve. In aluminum atom, none of the options give are correct.
Aluminum is an atom made up of 13 electrons and 13 protons. In an atom, there are several sub-particles, which are:
Protons are the positively charged sub-particle that are present inside the nucleus.Electrons are the negatively charged sub-particles that revolves around the nucleus. Neutrons does not have any charge, and is found in the nuclei of atoms.Therefore, the correct statement is that aluminum atom have positively charged nucleus around which electrons revolve. Hence, the given options are incorrect.
To know more about atoms, refer to the following link:
https://brainly.com/question/1641336?referrer=searchResults