Answer:
Most oxidation-reduction (redox) processes involve the transfer of oxygen atoms, hydrogen atoms, or electrons, with all three processes sharing two important characteristics: (1) they are coupled—i.e., in any oxidation reaction a reciprocal reduction occurs, and (2) they involve a characteristic net chemical change— .
Electrons will be transferred during redox reaction.
What is electron?The electron is subatomic particles which are placed in surrounding the nucleus. Electrons carry negative charge.
What is redox reaction?Redox reaction involve the transfer of electrons between intermediates. A redox reaction occurs when the oxidation states of the substrate change. The removal of electrons or even a rise in the oxidation state of such a chemical or its atoms is referred to as oxidation. The acquisition of electrons or a lowering in the oxidation number of a chemical or the atoms inside it is referred to as reduction.
Hence the answer will be electron
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Which equation represents positron decay?
Answer: 4
Explanation:
I found it online
Please help it’s due today
Estimate the heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is
converted to sulfur dioxide for the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
The heat evolved when 74.6 g of sulfur dioxide (molar mass = 64.07 g/mol) is 2838kJ/mol. For the given thermochemical equation.
SO2(g) + 12 O2(g)
SO3(g)
AH = -99.1 kJ/mol
What is thermochemical equation ?A balanced stoichiometric chemical equation known as a thermochemical equation contains the enthalpy change, ΔH.
There are two types of thermochemical reaction:
Thermogenic Reaction. certain thermochemical processes that absorb heat. Enthalpy change for this reaction is favorable.
Heat-producing Reaction. Exothermic reactions are those in which energy or heat are released during the reaction.
A chemical equation shows the initial molecule, reactants, and final products separated by an arrow, but a thermochemical equation is a balanced stoichiometric chemical reaction that also includes the enthalpy change.
Thus, 2838 kJ/mol heat evolved in given equation.
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The period of development from fertilized egg to birth is known as
The period of development from fertilized egg to birth is known as [tex]{ \bf{ \underbrace{prenatal\: development}}}[/tex].
[tex]\bold{ \green{ \star{ \orange{Mystique35}}}}⋆[/tex]
what is large intestine
Explanation:
The large intestine (colon or large bowel) is about 5 feet long and about 3 inches in diameter. The colon absorbs water from wastes, creating stool. As stool enters the rectum, nerves there create the urge to defecate.hope it helps.stay safe healthy and happy!!!what type of volcanic eruption produce ash fall?
Explanation:
I would say explosive eruptions caused by decompression of the dissolved gases in the magma. The Mt Pinatubo eruption is an example of a massive ash fall that eventually closed down an American base in the Philippines. And just recently the island of St. Vincent suffered major damage from ash fall due to a volcanic eruption.
1) 2C2H6 + 7O2 --> 4CO2 + 6H2O
a) How many moles of O2 are required to react with 24 moles of C2H6?
b) How many grams of C2H6 are required to react with 12 moles of O2?
c) How many grams of O2 are required to react with 200g of C2H6?
Show how you got the answer
Answer:
a).
[tex]2 \: moles \: of \: ethane \: react \: with \: 7 \: moles \: of \: oxygen \\ 24 \: moles \: react \: with \: ( \frac{24 \times 7}{2} ) \: moles \\ = 84 \: moles[/tex]
b).
[tex]2 \: moles \: react \: with \: 7 \: moles \\ ( \frac{12 \times 2}{7} ) \: moles \: react \: with \: 12 \: moles \\ = 3 .43 \: moles \\ 1 \: mole \: weighs \: 30 \: g \\ 3.43 \: moles \: weigh \: (3.43 \times 30) \\ = 102.9 \: g[/tex]
c).
746.7 g
Si se hace reaccionar CH3CH3 (etano) con cloro, en presencia de luz ultravioleta, los productos obtenidos en este paso son
Answer:
La reacción de etano, CH₃CH₃ y cloro, Cl₂ en presencia de luz solar se conoce como reacción de halogenación.
Los radicales de cloro se forman cuando el cloro se expone a la luz solar a continuación;
Cl₂ → 2Cl *
Se forma un radical etano cuando el etano, C₂H₆ reacciona con un radical libre de cloro, Cl *, como sigue;
C₂H₆ + Cl → C₂H₅ * + HCl
Se forma un producto halogenado cuando un radical libre de etano reacciona con una molécula de cloro como sigue;
C₂H₅ * + Cl₂ → C₂H₅Cl + Cl *
Un producto halogenado puede reaccionar además con un radical libre para producir como sigue;
C₂H₅Cl + Cl * → C₂H₅Cl₂
Explanation:
In a chemical reaction, the number of moles of the reactants
A.
should always be equal to the number of moles of the products.
B.
depends on the amount of product that is formed.
C.
should never be equal to the number of moles of the products.
D.
may or may not be equal to the number of moles of the products.
Answer:
may or may not be equal to the number of moles of the products.
Explanation:
A chemical reaction involves the interaction between reactants to yield products. The number of moles of reactants and products in the system depends on the stoichiometry of the reaction.
The balanced reaction equation shows us the number of moles of reactants and products involved in the reaction.
Hence, in the balanced chemical reaction equation; the number of moles of reactants may or may not be equal to the number of moles of the products.
what are alpha particles??
Answer:
a helium nucleus emitted by some radioactive substances, originally regarded as a ray.
Explanation:
Answer:
They're charged particles Identical to the Helium Nucleus
Having 2 protons and 2neutrons and having a Mass of 4.
They're Heavy and slow(speed)In comparison to Beta particles and gamma rays
Usually Emitted from nucleus of radioactive nuclides during decay
Mass x height x gravity is the formula to calculate:
Answer:
Potential energy
Explanation:
[tex]p.e = mgh[/tex]
Which substance would you expect to dissolve most rapidly in 100 mL water?
A
0.4 g granulated sugar
B
0.2 g powdered sugar
C
0.4 g powdered sugar
D
0.2 g sugar cube
Answer:
b because it is just 0.2 g and powdered sugar has more contact surface than granulated sugar or sugar cube
The solubility can be given as the amount of solute that can be dissolved in the 100 ml of the solution. The most rapidly dissolved sugar in water is 0.2 gram powdered sugar.
What is a contact surface?The contact surface can be given as the area of the compound that is in direct contact with the solution.
The solubility of the compound is found more in the solute with increased surface area.
The surface area of powdered sugar will be maximum, as more granules of the sugar will be in contact with the water than the cube or the granulated sugar.
Thus, the most rapid dissolution in water is found with 0.2 grams of powdered sugar. Thus, option B is correct.
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Solve: The following question in the picture
Answer:
D is the answer to your question in my opinion
Answer:
I think it is option A
Explanation:
XY 2 will be three molecules which is only a or b. As molecules are usually in a ddiagr like a, I would go with option a
helppppp meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
The industry represented in the photo is most likely fishing. Other industries that rely on accurate weather forecasts are shrimping, fishery, and aquaculture
Explanation:
Question 8 of 10
Which functional group is within the compound shown below?
R-OH
A. Carbonyl
B. Amino
C. Ester
D. Hydroxy
Answer:
Hydroxyl (alcohol compound)
Explanation:
*view photo*
D. Hydroxy
A hydroxy or hydroxyl group is a functional group with the chemical formula -OH and composed of one oxygen atom covalently bonded to one hydrogen atom.Hydroxyl groups are polar, and the oxygen side is always negative, while the hydrogen side is always positive.The functional group of the alcohols is the hydroxyl group, –OH.For example: Methanol is an alcohol containing hydroxyl functional group.Therefore, the correct option is option D.
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PLEASE HELP THIS IS TIMED
Which of the following is a physical change?
CsF(s) + XeFo(s) → CsXeF;(s)
CO2 (s) + CO2(g)
O N2 (g) + 3H2 (g) → 2NH3 (g)
2H2 (g) + O2 (g) → 2H20 (1)
Zn(s) + 2 MnO2(s) + H20(1) → Zn(OH)2(s) + Mn2O3(s)
1. Which of the following combinations correctly represents the process of
photosynthesis?
a) Carbon Dioxide + Water + solar energy - Glucose + Oxygen
b) Carbon Dioxide + Water - Glucose + Oxygen + solar energy
c) Glucose + Oxygen Carbon Dioxide + Water + energy
d) Glucose + Oxygen + energy +
Carbon Dioxide + Water
Answer:
A
Explanation:
Answer:
I think It should be option A. It would have been B but, solar energy is not giving out, it's taken in
3. What are the planets called that are mostly made of gas?
Explanation:
The gas planets are Jupiter, Saturn, Uranus and Neptune.
Answer:
A gas giant is a large planet composed mostly of gases, such as hydrogen and helium, with a relatively small rocky core. The gas giants of our solar system are Jupiter, Saturn, Uranus and Neptune. These four large planets, also called jovian planets after Jupiter, reside in the outer part of the solar system past the orbits of Mars and the asteroid belt. Jupiter and Saturn are substantially larger than Uranus and Neptune, and each pair of planets has a somewhat different composition.Although there are only four large planets in our solar system, astronomers have discovered thousands outside of it, particularly using NASA's Kepler Space Telescope. These exoplanets (as they are called) are being examined to learnmore about how our solar system came to be.Explanation:
hopeit helps...Where does photosynthesis start?
Answer:
Have a nice day :)
Explanation:
the chloroplast
Photosynthesis occurs in the chloroplast, an organelle specific to plant cells. The light reactions of photosynthesis occur in the thylakoid membranes of the chloroplast. Electron carrier molecules are arranged in electron transport chains that produce ATP and NADPH, which temporarily store chemical energy.
PLEASE ANSWER QUICKLY!! 25. Which gas sample contains a total of 3.0 x 1023 molecules?
A) 71 g of Cl2
B) 2.0 g of H2
C) 14 g of N2
D) 38 g of F2
Answer:
14 g of N2
Explanation:
If we look at the options, we will notice that the correct answer needs to be a gas that has about half of the molecular mass of the gas.
If we consider nitrogen gas whose molecular mass is 28g/mol, half of the molecular mass is 14 g.
So;
28g of N2 contains 6.02 × 10^23 molecules of N2
14g of N2 contains 14 × 6.02 × 10^23 /28
= 3.0 x 10^23
1. Two hypothetical elements in the periodic table have different characteristics as shown in the following table.
ELEMENT, ELECTRONEGATIVITY, TYPE OF ION, ELECTRICAL CONDUCTIVITY, BRIGHTNESS
X Low Electro cation ion high conduc brightness yes
Y High Electro anion ion none conduc brightness no
According to the data in the table, answer the following questions.
a. If you were to carry out an experiment with these 2 hypothetical elements, write a hypothesis to differentiate them and write another hypothesis about how they would react with oxygen and water.
HYPOTHESIS 1:
HYPOTHESIS 2:
In four steps, design an experiment (write step 1, step 2, step 3 and step 4) to check and verify what types of links would form these elements X and Y if after a series of reactions these elements join in some type chemical bonding.
STEP 1
STEP 2
STEP 3
STEP 4
b. A series of reactions of elements X and Y are given below, complete these reactions bearing in mind that X has an oxidation number +2 and Y has an oxidation number +6.
I. X + O2 XO
II. Y + O2 YO3.
III. XO + H2O X(OH)2
IV. YO3 + H20 H2YO4.
V. X(OH)2 + H2YO4 A + H2O.
d. Considering the result (A) in reaction number 5, answer:
I. What type of chemical bond do you think A has?
II. What are its physical and chemical properties?
III. Design a four-step experiment so that you can identify the type of chemical bond that substance A obtained in reaction 5 has. The design must contain at least 2 variables to be measured and 2 hypotheses with these variables.
Answer:
gas and element and compound
Explanation:
because it's different and more power so the elements
Write the formula for Magnesium sulphate
MgSO4 is the formula for magnesium
WHAT IS EXOTHERMIC EXPLAIN
Explanation:
An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.
hope it helps
stay safe healthy and happy..Answer:
Exothermic reactions are reactions or processes that release energy, usually in the form of heat or light. In an exothermic reaction, energy is released because the total energy of the products is less than the total energy of the reactants.Explanation:
I hope this helps u have a nice day ☘17. A sample of oxygen gas has volume 150.0 mL, at 0.947 atm, what will be the volume of the gas at 750.12 mm of Hg if temperature remain constant.
Answer:
143.9 mL is the new volume for the gas.
Explanation:
Let's apply one of the gases law to solve this problem:
Boyle's law states that the product of pressure and volume remains constant when the T° is not modified.
P₁ . V₁ = P₂ . V₂
Be careful because we have T° in mmHg. We need to convert to atm:
750.12 mmHg . 1 atm / 760 mmHg = 0.987 atm
We replace data:
150 mL . 0.947 atm = 0.987 atm . V₂
V₂ = (150 mL . 0.947 atm) / 0.987 atm
V₂ = 143.9 mL
This term P . V comes from the Ideal Gases Law
P . V = n . R . T
In which situation would hydrogen bonding be present?
Answer:
Water ?
Need more info.
Water is [tex]H_{2}[/tex]O
Explanation:
Answer:
Hydrogen bonding occurs when a protonic H is bonded to F, O or N and there must be a lone pair of electron in the F, O or N atom.
What is the molarity of a 750 milliliters solution containing 54.0 grams of KBr (help me please)
Answer: The molarity of KBr solution is 0.605 M
Explanation:
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L.
The formula used to calculate molarity:
[tex]\text{Molarity of solution}=\frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (mL)}}[/tex] .....(1)
Given values:
Given mass of KBr = 54.0 g
Molar mass of KBr = 119 g/mol
Volume of the solution = 750 mL
Putting values in equation 1, we get:
[tex]\text{Molarity of solution}=\frac{54.0\times 1000}{119\times 750}\\\\\text{Molarity of solution}=0.605M[/tex]
Hence, the molarity of KBr solution is 0.605 M
por que el petroleo es un no recurso renovable
Answer:
Por ejemplo, el petróleo o el carbón son ejemplos de recursos no renovables porque, aunque se forman mediante un proceso natural, este necesita demasiado tiempo. ... Esos combustibles fósiles provienen de materia orgánica, pero tardan cientos de miles de años en producirse.
hola genteee ayuda me pueden decir 5 propiedades físicas y 5 propiedades químicas del ácido sulfúrico porfa es urgente !
Answer:
La respuesta está en la explicación.
Explanation:
Las propiedades físicas son las visibles y medibles que no afectan químicamente la sustancia en cuestión. Las propiedades químicas hacen alusión a la reactividad de la sustancia:
Propiedades físicas ácido sulfúrico:
Líquido a temperatura ambiente.
Densidad: 1.83g/mL
Punto de fusión: 10°C
Punto de ebullición: 337°C
Índice de refracción: 1.397
Propiedades Químicas:
Ácido Fuerte.
Oxidante Fuerte.
Miscible con el agua reaccionando exotérmicamente.
A temperaturas > 30°C produce vapores azufrados.
Estable en concentraciones menores al 98%
De acuerdo con la primera ley de kihrechhoff determina las intensidades desconocidos así como su sentido. Ayudaaaa:(
oh sorry I'm American I can't understand that
Explanation:
but...thanks for points hehe
Reaction of hypochlorous acid and ammonia is product-favored system at equilibrium. Answer A: Reaction of hypochlorous acid and ammonia is product-favored system at equilibrium. A Reaction of hypochlorous acid and ammonia is reactant-favored system at equilibrium. Answer B: Reaction of hypochlorous acid and ammonia is reactant-favored system at equilibrium. B Reaction of hypochlorous acid and ammonia yields pH 7.00. Answer C: Reaction of hypochlorous acid and ammonia yields pH 7.00. C No reaction occurs between hypochlorous acid and ammonia. Answer D: No reaction occurs between hypochlorous acid and ammonia. D Further data are needed to draw a conclusion about a prospective reaction.
Answer:
A. True
B. False
Explanation:
Reaction between hypochlorous acid and ammonia does not yields a Ph value of 7.00 , this value is defined to water and no other reaction can yield exactly this Ph value. The acid reaction will give a Ph value below 7 while a base reaction will give Ph value of above 7.
De la siguiente reacción química Fe2O3 + 3 H2O → __Fe(OH)3 para que se cumpla el balanceo en ella, en el espacio qué coeficiente estequiométrico se debe asignar
Answer:
Para que se cumpla el balanceo en la reacción química, en el espacio se debe asignar 2 como coeficiente estequiométrico.
Explanation:
La ley de conservación de la materia establece que, dado que no se puede crear ni destruir ningún átomo en una reacción química, el número de átomos que están presentes en los reactivos debe ser igual al número de átomos presentes en los productos.
Luego, debes equilibrar la ecuación química. Para eso, primero debe mirar los subíndices al lado de cada átomo para encontrar el número de átomos en la ecuación. Si el mismo átomo aparece en más de una molécula, debes sumar sus cantidades.
Los coeficientes ubicados frente a cada molécula indican la cantidad de cada molécula para la reacción. Este coeficiente puede modificarse para equilibrar la ecuación, del mismo modo que nunca debe alterar los subíndices.
Al multiplicar el coeficiente mencionado por el subíndice, obtienes la cantidad de cada elemento presente en la reacción.
En este caso la reacción química es:
Fe₂O₃ + 3 H₂O ⇒ ____ Fe(OH)₃
Entonces, teniendo en cuenta todo lo anterior, se puede determinar la cantidad de elementos en cada lado de la ecuación:
Lado izquierdo: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos H Lado derecho: 1 hierro Fe, 3 oxígeno O y 3 hidrógenos HSe puede observar que la reacción química no esta balanceada porque se tiene diferentes cantidades de cada elemento a cada lado de la reacción. Para equilibrarla, se comienza balanceando el hierro. Para eso, el coeficiente estequiométrico debe ser dos:
Fe₂O₃ + 3 H₂O ⇒ 2 Fe(OH)₃
Entonces:
Lado izquierdo: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos H Lado derecho: 2 hierro Fe, 6 oxígeno O y 6 hidrógenos HAhora, a cada lado de la reacción se tiene la misma cantidad de cada elemento, por lo que la reacción esta balanceada.
Para que se cumpla el balanceo en la reacción química, en el espacio se debe asignar 2 como coeficiente estequiométrico.
