Answer:
121 aprox.
Explanation:
mass/molar mass = Q/CF
where mass=?
molar mass of Al=27
Q=It = 15×24×60×60
C=3
F=96500
What is a natural disaster?
Answer:
Explanation:
A natural disaster is a major adverse event resulting from natural processes of the Earth; examples include floods, hurricanes, tornadoes, volcanic eruptions, earthquakes, tsunamis, storms, and other geologic processes
Answer:
A natural disaster is a natural, major harmful event resulting from natural processes of the Earth such as floods, earthquakes, or hurricanes, tornadoes, volcanic eruptions, tsunamis, storms, and other geologic processes that causes great damage or loss of life.
Calculate the total energy, in kilojoules, that is needed to turn a 46 g block
of ice at -25 degrees C into water vapor at 100 degrees C.
Answer: The total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.
Explanation:
Given: Mass = 46 g
Initial temperature = [tex]-25^{o}C[/tex]
Final temperature = [tex]100^{o}C[/tex]
Specific heat capacity of ice = 2.05 [tex]J/g^{o}C[/tex]
Formula used to calculate the energy is as follows.
[tex]q = m \times C \times (T_{2} - T_{1})[/tex]
where,
q = heat energy
m = mass
C = specific heat capacity
[tex]T_{1}[/tex] = initial temperature
[tex]T_{2}[/tex] = final temperature
Substitute the values into above formula as follows.
[tex]q = m \times C \times (T_{2} - T_{1})\\= 46 g \times 2.05 J/g^{o}C \times (100 - (-25))^{o}C\\= 11787.5 J (1 J = 0.001 kJ)\\= 11.787 kJ[/tex]
Thus, we can conclude that the total energy, in kilojoules, that is needed to turn a 46 g block of ice at -25 degrees C into water vapor at 100 degrees C is 11.787 kJ.
En términos de energía, ¿a qué se debe que sea más difícil detener un camión en comparación a una bicicleta?
Answer:
hola
Explanation:because si
Why is it important for scientist to be repeatable?
Answer:
It is important for scientists to be repeatable so it lets them see patterns and trends in their results. This is affirmative for their work, making it stronger and better able to support their claims. This helps maintain The integrity of data.
Repeating an experiment more than once helps determine if the data was a fluke, or represents the normal case. It helps guard against jumping to conclusions without enough evidence. The number of repeats depends on many factors, including the spread of the data and the availability of resources
Explanation:
Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant? (3 points)
Select one:
a. FeS2
b. Fe2O3
c. O2
d. SO2
If 8 moles of FeS2 react with 15 moles of O2, the limiting reactant is O2.
WHAT IS LIMITING REACTANT:A limiting reactant is reactant that is totally consumed when the chemical reaction is completed.According to this question, the following reaction was given: 4FeS2 + 11O2 → 2Fe2O3 + 8SO2.4 moles of FeS₂ reacts with 11 moles of O₂
This means, 8 moles of FeS₂ will react with (8 × 11/2) = 22 moles of O₂15 moles of O₂ is available. In comparison with 22 moles, O₂ is in short supply .
Therefore, If 8 moles of FeS2 react with 15 moles of O2, O₂ is the limiting reagent.
Learn more about limiting reactant at: https://brainly.com/question/14225536
Answer:
They are right it's O2
Explanation:
I accidently rated it low but it's 100% right
What role do stomach enzymes play in digestion? A They transfer food out of the esophagus. B They break down food into smaller parts. C They move food down into the intestines. D They physically mix food with stomach acid.
Answer:
b
Explanation:
Answer:
b
Explanation:
b
Which of the following are equal to 32°F?
A. 0°C
B. 273 K
C. 100°C
D. 373 K
Answer:
A. 0°C............... sorry, the anwser has to be 20 characters long
what is the state of matter that takes shape of a container???
Answer:
Liquid and gas is the matter that takes shape of a container
It can also be called fluid since fluid is distributed into liquid and gas
Explanation:
I hope that is enough for your answer, hope this will help
The bond between which two atoms is most polar
H-O
C-H
F-H
F-F
Because of heredity, members of the same species do not have the same traits.
True or false
Answer:
false
Explanation:
use the rapid quark for a explain
Which term refers to energy stored within the center of an atom?
A. Thermal energy
B. Nuclear energy
C. Chemical energy
D. Light energy
Answer: i'm pretty sure it's b if i remember correctly.
Explanation:
i learned this a while ago so i'm not completely sure.
Identify all of the gas law equations that relate to the ideal gas law.
**Check for the proof photo at the bottom.**
**Answers are in bold.**
__________________________________________________________
Answers on the left:Identify all of the gas law equations that relate to the ideal gas law.
3. V₁/T₁=V₂/T₂
4. V₁/n₁=V₂/n₂
5. P₁V₁=P₂V₂
7. P₁/T₁=P₂/T₂
__________________________________________________________
Answers on the right:A balloon containing 0.0400 mol of a gas with a volume of 500 mL was expanded to 1.00 L. Answer the questions and round answers to nearest hundredth place. Which equation should you use to find the amount of gas added?
B. n₂=V₂n₁/V₁
What is the final number of moles?
0.08 mol
__________________________________________________________
Explanation:The ideal gas law is Boyle's law, Charles's law, Gay-Lussac's law, and Avogadro's law combined into one equation. Avogadro's law is V₁/N₁=V₂/N₂, Charles's law is V₁/T₁=V₂/T₂, Gay-Lussac's law is P₁/T₁=P₂/T₂, and Boyle's law is P₁V₁=P₂V₂.
For the balloon problem, B is the correct answer because we are looking for the final moles of gas added. Answer B gives the equation that equals n₂, n₂ means final number of moles. The problem gives us initial volume (500 mL), final volume (1 L), and initial moles amount (0.04 mol). Plug these numbers into the equation, n₂=V₂n₁/V₁, using consistent units. Note that V₁=initial volume, V₂=final volume, n₁=initial moles, and n₂=final moles
Here's a photo of Edge just incase.
What type of reaction happens inside a nuclear power plant?
A. A chemical reaction
B. A photoelectric reaction
C. A nuclear chain reaction
D. An acid-base reaction
Las sustancias ionicas y los metale sson electricamente neutros. ¿como es esto posible si estan formados por iones, que posen carga electrica?
Answer:
ver explicacion
Explanation:
Los iones se forman cuando las especies químicas pierden o ganan electrones.
Las sustancias iónicas consisten en un ión positivo y negativo cuyas cargas se equilibran exactamente entre sí, por lo que el compuesto iónico es neutro.
Los átomos de metal se mantienen unidos por el enlace metálico. Esto implica la interacción entre iones metálicos cargados positivamente y un mar de electrones negativos. Las cargas positivas de los iones metálicos están exactamente equilibradas por el mar de electrones cargados negativamente, por lo que el metal es neutro.
Which of the following is an acid?
Be(OH)2
HCl
LiBr
NH3
Answer:
HCL is your the answer of which is the acid
The acid should be considered as the HCL namely hydrogen chloride (HCl).
What is HCL acid?It is used for neutralization the alkaline agents that acted as the bleaching agent in terms of food, textile, metal.
It should be neutralized at the time of realization into the soil. And, hydrolyzed when it should be exposed to water.
hence, the second option is correct.
learn more about acid here: https://brainly.com/question/18887998
CH4 + O2 → CO2 + H2O what is the balacnced chemical reaction
Answer:
The combustion of methane or octane is exothermic; it releases energy. CH4 + 2 O2 → CO2 + 2 H2O + energy The energies of the products are lower than the energiies of the reactants
In two or more complete sentences explain how to balance the chemical equation and classify its reaction type.
___NaI + ___Pb(SO4)2 ⟶ ___PbI4 + ___Na2SO4
Which substance is a binary acid?
hydrochloric acid
phosphoric acid
nitrous acid
sulfuric acid
Answer:
A) Hyrdrochloric Acid
Explanation:
This is because binary acids are molecular compounds in which hydrogen is combined with a non-metal element. Hydrochloric acid has hydrogen present in it's compound, therefore identifying it as the only binary acid amongst the answer choices.
Porrrrrrffffffaaaaaavvvvvvooooorrrrrrr
Answer:
2.2)solido
2.3)Sólido cristalino
2.4)Sólido amorfo
4. Assign an oxidation state to the element whose atom is underlined in the following compound: AIH3
O Al: +5
O Al: -5
Ο Ο Ο
Al: -3
O Al: +3
Answer: The oxidation state of Al in [tex]AlH_{3}[/tex] is +3.
Explanation:
The number attained by an atom or substance due to loss or gain of electrons is called oxidation state.
For example, in [tex]AlH_{3}[/tex] it is known that the oxidation state of hydrogen is -1 as aluminum is a cation so it cannot have an oxidation state as 'minus'.
Whereas hydrogen has the property to act both as a cation and an anion.
Let us assume the oxidation state of Al is x in the compound [tex]AlH_{3}[/tex].
Hence, oxidation state of Al is calculated as follows.
[tex]x + 3(-1) = 0\\x - 3 = 0\\x = +3[/tex]
This means that the oxidation state of Al in [tex]AlH_{3}[/tex] is +3.
Thus, we can conclude that oxidation state of Al in [tex]AlH_{3}[/tex] is +3.
10 uses of non-metals
Answer: 10 uses
Explanation:
1] Oxygen is used for breathing.
2] Chlorine is used for purifying water.
3] Phosphorous is used in crackers.
4] Non - metals like nitrogen is used in fertilizers.
5] Graphite is used as a good conductor of electricity.
6] Pottassium is used in fertilizers.
7] Nitrogen is used by plants.
8] Graphite is used in making leads.
9] Carbon is used as a fuel.
10] Bromine is used in dyes and pesticides
What is created when electrons become detached from their local atom?'
a) An Atom
b) Cation
c) Anion
d) Delocalized electrons
Answer:
B. Cation
Explanation:
As an electron is removed from the atom it is then converted into a positively charged ion known as a Cation.
Hope this helps u
ASAAAP HURRRY PLS!!!
Where in aerobic respiration is the largest amount of energy produced?
A)
At the beginning of the cycle, when glucose is oxidized to pyruvate.
B)
At the end of the electron transport chain, when oxygen is reduced.
C)
At the end of the electron-transport chain, when oxygen is oxidized.
D)
At the beginning of the electron transport chain, when oxygen is oxidized.
How many liters of hydrogen (at 0.97atm and 24c) will produce 180 grams of water
I also need to know how to get the answer.
H₂ + ½O₂ → H₂O
2g → 18g
So, 18g water needs 2g H₂
So, 1g water needs 2/18g H₂
So, 180g water needs 2/18 x 180g H₂
→ 20 litres of H₂
Answer:
Explanation:
Molar mass of water, H2O = 2 + 16 = 18
So 180g of water contains 10M
H2 + O -> H2O
10M of Hydrogen is needed to produce 10M of water.
Molar volume at STP = 22.4L
So 10M of Hydrogen at STP = 224L
With Ideal Gas Law, P1V1/T1 = P2V2/T2
At STP, P1 = 1atm, T1=273K
At 0.97atm and 24c (273+24 = 297K), 10M of Hydrogen will take up:
1*224/273 = 0.97*V2/297
V2 = 224*297/273/0.97
= 251.23L
So the answer is 251.23L
Fill in the coefficients that will balance the following reaction:
what two factors affect the pressure in a solid
There are four main factors that can affect the reaction rate of a chemical reaction:
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
please make me brainlist answer
What type of substance is octane?
Answer:
don't know
Explanation:
Thanks❤ have a nice day
Answer:
Liquid
Explanation:
Octane is a straight chain alkane composed of 8 carbon atoms. It has a role as a xenobiotic. N-octane is a colorless liquid with an odor of gasoline.
238 U 92 write the following decay sequence.
Answer: The given decay sequence is [tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex].
Explanation:
An alpha-particle is a helium atom. Hence, when an alpha decay occurs in [tex]^{238}_{92}U[/tex] then the reaction equation is as follows.
[tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He[/tex]
Now, in sequence the equation for beta decay is as follows.
[tex]^{234}_{90}Th \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex]
Hence, the sequence will be as follows.
[tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex]
Thus, we can conclude that the given decay sequence is [tex]^{238}_{92}U \rightarrow ^{234}_{90}Th + ^{4}_{2}He \rightarrow ^{234}_{91}Pa + ^{0}_{-1}\beta[/tex].
Detecta cuál de las siguientes fórmulas estructurales no cumple con la tetravalencia del carbono (formar cuatro enlaces)
El ejercicio completo con las formulas es el siguiente:
cuál de las siguientes fórmulas no cumple con la tetravalencia del átomo de carbono.
a. CH3-CH2-CH2-OH
b. CH3-CH=CH2
c. CH3-CH2=CH2
d. CH3-CH2-CH3
Answer:
La respuesta correcta es la opción C
Explanation:
En la formula C, podemos ver claramente que no se cumple con la tetravalencia del carbono pues al sumar el total de las valencias del carbono nos da 5
CH3 - CH2 = CH2 = Total de valencias del carbono 5
1 + 2+ 2 = 5
Para que la formula sea correcta debe eliminarse un hidrogeno quedando la formula de la siguiente manera:
CH3 - CH = CH2
1 + 1 + 2 = 4
Determine which statement is true. A) Electrons travel around the nucleus in circular orbits. B) The Bohr atom is the model currently accepted for electrons in atoms. C) An electron's position and energy (momentum) can be know with certainty simultaneously. D) Currently, scientists know the energies of electrons but only approximate areas (orbitals) where the electrons are probably located.
Answer:
A. True
B. True
C. False
D. False
Explanation:
Electrons travel around the nucleus in circular orbits and moves from one orbit to another orbit when they absorb energy or lose energy. The Bohr atom is the model currently accepted for electrons in atoms because this model provides the right information about presence of electrons around the orbits. Scientists know the energies of electrons as well as the areas (orbitals) where the electrons are probably located with the help of new technology.
Answer:d
Explanationusa test prep