Answer:
no
Explanation:
because when is iron oxide + water given you iron hydroxide while the other one is Iron plus 2 moles of water giving you iron hydroxide and hydrogen
Calcule la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) que se preparó al mezclar, en un recipiente aforado, 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. *
0.4
0.6
0.3
0.5
Considerando la definición de molaridad, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].
La molaridad es una medida de la concentración de un soluto en una disolución que se define como el número de moles de soluto que están disueltos en un determinado volumen.
La molaridad de una solución se calcula dividiendo los moles del soluto por el volumen de la solución:
[tex]Molaridad=\frac{numero de moles de soluto}{volumen}[/tex]
La Molaridad se expresa en las unidades [tex]\frac{moles}{litro}[/tex].
En este caso, sabes que una solución acuosa se preparó al mezclar 4 moles del ácido con suficiente agua hasta completar 8 litros de solución. Entonces, sabes que:
número de moles de soluto= 4 molesvolumen= 8 litrosReemplazando en la definición de molaridad:
[tex]Molaridad=\frac{4 moles}{8 litros}[/tex]
Resolviendo:
Molaridad= 0.5 [tex]\frac{moles}{litro}[/tex]
Finalmente, la molaridad de una solución acuosa de ácido sulfúrico (H₂SO₄) es 0.5 [tex]\frac{moles}{litro}[/tex].
Aprende más:
https://brainly.com/question/17647411?referrer=searchResultshttps://brainly.com/question/21276846?referrer=searchResultsIf you have a ring that contains 1.94 g of gold, how many atoms of gold are there in the ring?
describe the development of the theory of atomic structure
this question is worth 6 marks
What role do insects play in the fertilization process?[Bees]
AThey transport seeds from trees to the groundincorrect answer
BThey collect nectar from the interior parts of plantsincorrect answer
CThey deliver pollen from the stamens of plants to the ovaries of other plantsincorrect answer
DThey eat fruit, exposing the seeds so that they can sprout and grow
Answer:
C. They deliver pollen from the stamens of plants to the ovaries of other plants
Explanation:
hope this helps :)
Salt dissolving in water is an example of what?
chemical change
chemical property
Physical Change
Answer:
chemical change
Explanation:
because chemical chande is a permanent change
why do we adjust coefficients when balancing chemical equations and not subscripts?
Answer:
By changing the coefficients you change the amount you have of certain compounds in the equation, whereas changing the subscript would change what compounds are actually in the equation because it would change the ratio of how many atoms of each element are in a compound.
For Example:
Outside of Balancing Equations, [tex]NO_{2}[/tex] (Nitrite) and [tex]NO_{3}[/tex] (Nitrate) are different because one forms a strong acid while the other forms a weak acid based on how many oxygen atoms are added to the compound. So in a chemical equation, if you change the subscripts, you change the entire compound so your reaction may be with a weak acid instead of a strong acid and give you a different product. Meanwhile, changing the coefficient changes the amount of the compound you have for the reaction in order to maintain the Conservation of Mass Law.
what is the main difference between sexual and asexual reproduction
Answer:
Asexual reproduction does not involve sex cells or fertilisation . Only one parent is required, unlike sexual reproduction which needs two parents. Since there is only one parent, there is no fusion of gametes and no mixing of genetic information.
The main difference between sexual and asexual reproduction is that sexual reproduction involves the fusion of gametes, while asexual reproduction does not.
In sexual reproduction, offspring are produced through the fusion of gametes (reproductive cells) from two parent organisms. This fusion, known as fertilization, results in offspring that inherit genetic material from both parents. This genetic recombination introduces variation in the offspring, promoting genetic diversity within a population.
In contrast, asexual reproduction involves the production of offspring without the involvement of gametes or the fusion of genetic material from two parents. A single parent organism reproduces by generating genetically identical or near-identical offspring through various methods such as budding, fragmentation, or binary fission. Asexual reproduction typically leads to offspring that are genetically identical to the parent, lacking the genetic diversity observed in sexual reproduction.
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Describe how the production of a gas (carbon dioxide) suggests a chemical change
occurred?
Review the information from the documents you read for this assignment. Use what you learned to answer the following question. What were the major effects of a dust storm? Give your answer in at least four sentences.
Answer:
what people experienced during a dust storm
how people reacted to a dust storm
what people did after a dust storm
Explanation:
i passed
Answer:
what people experienced during a dust storm
how people reacted to a dust storm
what people did after a dust storm
Explanation:
Cómo se clasifica el aire?
Answer:
Not me
Explanation:
48. Categorize each of the elements in problem 47 as a
representative element or a transition metal
Will give brainliest :)
Answer:
The correct answer is a transition metal.
Explanation:
Hope it helps.
Comments:
Hearts and RatesMark me as Brainliest AnswerFollow MeAll the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
Thus, all the given elements are representative elements as they have valence electrons present in p -orbital except option a which has valence electron d-orbital and hence is not a representative element.
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A reaction between an acid and a base produced lithium chloride (LiCl). What acid and base combination could produce this salt?
A. sulfuric acid and lithium hydroxide
B. hydrochloric acid and lithium hydroxide
C. sulfuric acid and magnesium hydroxide
D. hydrochloric acid and magnesium hydroxide
Answer:
B. hydrochloric acid and lithium hydroxide
Explanation:
Answer:
thank you!
the answer is B) hydrochloric acid and lithium hydroxide.
Explanation:
have a rest of your day.
Will any of these properties change after a couple of hours in the sun
Explanation:
what properties are you talking about?
How many grams of sodium hydroxide are present in 250.0 mL of a 0.300 M NaOH solution?
HELP!!
Do you think the number of asteroid samples a pod is carrying could make a difference? Might that explain why the
same strength thruster force caused this pod to have a different change in velocity? Explain your ideas, even if you are
unsure
which element is in period 2 and group 6
2. The mass number tells the total number of
nucleus of an atom. These particles collectively are called
both are located in the nucleus.
Answer: The mass number tells the number of protons.
Explanation:
which elements from the periodic table are the least reactive
Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level. This is the most stable arrangement of electrons, so noble gases rarely react with other elements and form compounds.
Group 18; The Noble Gases contains the elements on the periodic table that would be the least reactive out of all the elements. So, this include any gas element, such as helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). Hence, if you have the options:
(The Option in Bold is Correct)
O the group with fluorine at the topO the group with carbon at the topO the group with helium at the topO the group with hydrogen at the top-----------------------------
Hope this helps!
-----------------------------
b) How much Phosphorus Pentachloride can be made if you begin with 17.8 g of chlorine gas?
An increase in which property would cause an electromagnetic wave's energy
to increase?
A. Wavelength
B. Mass
C. Frequency
D. Speed
SUBMIT
2. For each of the six elements aluminium (Al), boron (B), nitrogen (N), oxygen (O) phosphorus (P), sulfur (S), write down:
a. the period of the periodic table to which it belongs.
b. its group number in the periodic table.
c. its proton number (atomic number).
d. the number of electrons in one atom.
e. its electronic configuration.
f. the number of outer-shell electrons in one atom.
g. Which of the above elements would you expect to have similar properties?
Elements in the same group of the periodic table tend to have similar chemical properties
What is the periodic table?For Al;
a. Period: Period 3
b. Group: Group 13
c. Proton Number (Atomic Number): 13
d. Number of Electrons: 13
e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p¹
f. Number of Outer-Shell Electrons: 3
g. Similar Properties: Boron (B)
For Boron (B):
a. Period: Period 2
b. Group: Group 13
c. Proton Number (Atomic Number): 5
d. Number of Electrons: 5
e. Electronic Configuration: 1s² 2s² 2p¹
f. Number of Outer-Shell Electrons: 3
g. Similar Properties: Aluminium (Al)
For Nitrogen (N):
a. Period: Period 2
b. Group: Group 15
c. Proton Number (Atomic Number): 7
d. Number of Electrons: 7
e. Electronic Configuration: 1s² 2s² 2p³
f. Number of Outer-Shell Electrons: 5
g. Similar Properties: Phosphorus (P)
For Oxygen (O):
a. Period: Period 2
b. Group: Group 16
c. Proton Number (Atomic Number): 8
d. Number of Electrons: 8
e. Electronic Configuration: 1s² 2s² 2p⁴
f. Number of Outer-Shell Electrons: 6
g. Similar Properties: Sulfur (S)
For Phosphorus (P):
a. Period: Period 3
b. Group: Group 15
c. Proton Number (Atomic Number): 15
d. Number of Electrons: 15
e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p³
f. Number of Outer-Shell Electrons: 5
g. Similar Properties: Nitrogen (N)
For Sulfur (S):
a. Period: Period 3
b. Group: Group 16
c. Proton Number (Atomic Number): 16
d. Number of Electrons: 16
e. Electronic Configuration: 1s² 2s² 2p⁶ 3s² 3p⁴
f. Number of Outer-Shell Electrons: 6
g. Similar Properties: Oxygen (O)
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The gain of electrons by an element or ion in a reaction is called __.
A. fractionation
B. Disproportionation
C. Oxidation
D. Reducing
Answer:
Reduction
Explanation:
took the test
in a battery that uses a licoo2 cathode approximately 50% of the lithium migrates from the cathode to the anode on charging. in a battery that uses a limn2o4 cathode what fraction of the lithium in limn2o4 would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode?
Answer:
92.4%
Explanation:
Assume 100g of the cathode material. The LiCoO2 cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55g Li migrates. 100g of the LiMn2O4 cathode contain 3.84g of Li. The fraction of lithium in LiMn2O4 that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:
(3.55g/ 3.84g ) * 100% = 92.4%
From electrolysis, 92.4% would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode.
What is electrolysis?
Electrolysis is a technique that uses direct electric current (DC) to drive an otherwise non-spontaneous chemical reaction. Electrolysis is commercially important as a stage in the separation of elements from naturally occurring sources such as ores using an electrolytic cell. The voltage that is needed for electrolysis to occur is called the decomposition potential.
Assume 100 g of the cathode material. The LiCoO₂ cathode has 7.09 g of Li. If half of Li migrates during charging, 3.55 g Li migrates. 100 g of the LiMn₂O₄cathode contain 3.84 g of Li. The fraction of lithium in LiMn₂O₄ that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode:(3.55 g/ 3.84 g ) × 100% = 92.4%
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Help this is so confusing like
Answer: which of the following is qualitative?
A. 100-calorie apple
B. 1-liter soda
C. triangular crystal
D. 10-inch brick
answer is D
Explanation:
explain why it is necessary to change models as new information becomes available.
Answer:
Scientific models are not a replacement for experimentation. They can be used in conjunction with experimentation to further understanding of a concept, event, or process. They are based on current scientific knowledge and may have to be changed when new discoveries are made.
Explanation:
that's my answer
#carryonlearning
Which is the correct word equation for photosynthesis? *
Answer:
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
kinetic energy increases as velocity ___
Answer:
square of it's speed
Explanation:
Answer:
kinetic energy increases as the square of its speed.
What happens to the molecules that make up a chocolate chip as it is heated in the oven?
Answer:As thermal energy is transferred to the chocolate, its molecules vibrate faster and faster. Eventually they vibrate fast enough that they start to slide past each other and move around. As this happens, the chocolate changes from a solid to a liquid.
Explanation:
Answer:
it becomes
Explanation:
as a soggy liquid
that is how it becomes
liquid and little thick
as it is heated
hope it helps you
thank you
I need help with the question below
Answer:
the answer is Crystal structures
Consider the following chemical reaction.
3 Zn(C₂H₃O₂)₂(aq) + 2 Na₃PO₄(aq) → 6 NaC₂H₃O₂(aq) + Zn₃(PO₄)₂(s)
A chemist makes a solution of zinc acetate by dissolving 20.5 g Zn(C₂H₃O₂)₂ in 105 mL H₂O. What is the concentration of this zinc acetate solution?
The concentration of the zinc acetate, Zn(C₂H₃O₂) solution is 1.067 M
We'll begin by calculating the number of mole in 20.5 g of Zn(C₂H₃O₂)₂Mass of Zn(C₂H₃O₂)₂ = 20.5 g
Molar mass of Zn(C₂H₃O₂)₂ = 65 + 2[(12×2) + (3×1) + (16×2)]
= 65 + 2[59]
= 183 g/mol
Mole of Zn(C₂H₃O₂)₂ =?Mole = mass / molar mass
Mole of Zn(C₂H₃O₂)₂ = 20.5 / 183
Mole of Zn(C₂H₃O₂)₂ = 0.112 mole Finally, we shall determine concentration of Zn(C₂H₃O₂). This can be obtained as follow:Mole of Zn(C₂H₃O₂)₂ = 0.112 mole
Volume = 105 mL = 105 / 1000 = 0.105 L
Concentration of Zn(C₂H₃O₂)₂ =?Concentration = mole / Volume
Concentration of Zn(C₂H₃O₂)₂ = 0.112 / 0.105
Concentration of Zn(C₂H₃O₂)₂ = 1.067 MTherefore, the concentration of the zinc acetate, Zn(C₂H₃O₂) solution is 1.067 M
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