Answer:
Ver explicacion
Explanation:
La capacidad de un elemento de existir en diferentes formas en el mismo estado físico se conoce como alotropía.
No es solo el carbono el que exhibe alotropía. También se sabe que el azufre y el fósforo exhiben alotropía.
Hay dos alótropos cristalinos de azufre; grafito y diamante. El grafito y el diamante difieren en la disposición de los átomos de carbono y la naturaleza de los enlaces entre los átomos de carbono en ambas sustancias.
Por lo tanto, el grafito y el diamante tienen propiedades físicas y químicas observadas completamente diferentes debido a las diferencias en la disposición de los átomos de carbono en cada sustancia, así como a las diferencias en la naturaleza de los enlaces entre los átomos de carbono en ambas sustancias.
water will boil when...
Answer:
C
Explanation:
Which choices are uses of electrical energy?
Choose all that apply.
A. creates useful gases
B. supplies energy for heat
C. provides power to lights
D. creates a magnetic force
Answer:
option A,B and C.
are the options I chose.
The electrical devices include those that are needed to power appliances and those that are used in daily life. In order to make things operational, they need power or energy.
Electrical energy is taken from the movement of electronically charged particles. These when collide produce energy that can be used for heating, lighting, etc.Hence the option C is correct.
Learn more about the choices are uses of electrical energy.
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Please answer all of the examples below!
Answer:
The first one is balanced. The second one is not.
Explanation:
The first one is balanced because there are the same amount of elements on the reactant side as there are on the product side. The second one is not balanced because there are not the same amount of elements on the reactant side as there are on the product side. Therefore, it is not balanced
More Detailed: first example
Reactant side (left of arrow)
H: 2
C: 1
O: 3
Product side (right of arrow)
H: 2
C: 1
O: 3
More detailed: second example
Reactant side:
Na: 1
O: 1
H: 1
C: 1
Product side:
Na: 2
O: 4
H: 2
C: 1
the variables needed to balance this equation is 2,1, 1, 1.
Which model could represent a neutral atom of nitrogen
Answer:
The answer is c.1. The atomic number of nitrogen is 7.
The electron arrangement of nitrogen is 2.5. With that said, atom 1 resembles the neutral atom of nitrogen because the innermost shell of the atom contains 2 electrons while the outermost shell of the atom contains 5 electrons.
The model that could represent a neutral atom of nitrogen is the first one. Thus, the correct option is C.
What is a Nitrogen atom?A nitrogen atom may be defined as a chemical element with an atomic number of 7 and an atomic mass of 14. It contains seven protons in its nucleus.
Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table. Being neutral, the number of protons that it has in its nucleus must be equal to that of the surrounding electron. Hence, the number of electrons are seven.
These seven electrons are only visible in the first model. Thus, the correct option for this question is C.
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• Create a stoichiometry problem. It can be a problem using moles, grams, enthalpy, solutions, or acids and bases. Make
sure there is an equation to balance
Answer:
All I can give you is The steps for it.
Explanation:
Almost all stoichiometric problems can be solved in just four simple steps:
: Balance the equation. Convert units of a given substance to moles.
Using the mole ratio, calculate the moles of substance yielded by the reaction.
Convert moles of wanted substance to desired units.
What is the measure of the indicated angle? 37∘ 53∘ 180∘ 127∘
Answer:
53∘
plz mark me as brainliest.
After getting a cut, you should wash it, even though it hurts. Why is it important to do this?
Answer: It is important to wash it becasue that way you can disinfect the cut and protect the cut from any infections.
Answer:
This will reduce the risk of infection and help stop the bleeding. It gets rid of the bacteria that may have been there. But, it is very important to disinfect it and clean it properly after the bleeding stops.
The geometry of a ______________ makes it a very stable shape.
Answer:
triangles
Explanation:
A 1.0 liter flask contains 90.1 moles of water vapor at 27.0 oC. What is the pressure of the gas?
Answer:
The pressure of the gas is 224839.8 atm
Explanation:
As we know
PV = nRT
Substituting the given values, we get -
P * 1 L = 90.1 moles * 8.314 4621(75). J K−1 mol−1 * 300
P = 224839.8 atm
The pressure of the gas is 224839.8 atm
Which of the following statements describes how humans would be affected if the ozone layer of Earth’s atmosphere were very damaged?
A. People would not spend as much time indoors.
B. The amount of food people eat each year would increase.
C. Human skin would burn much faster even with less exposure to sunlight.
D. Plants and flowers would grow much larger and produce more oxygen for people to breathe.
i thank its B my big brother helped me we thank its b
there is 115 mL of a gas is at 45.8 kPa and 57.2°C. What is the volume of the gas at 99.3 kPa and 112.3°C?
Answer:
115 mL of a gas is at 45.8 kPa and 57.2°C. What is the volume of the gas at 99.3 kPa and 112.3°C?[5] 11. ... What is the pressure of 62.76 g of carbon dioxide (CO2) gas if it occupies a volume of 35,000 mL at standard temperature?
Explanation:
By using gas law , the volume will be 61.9 mL .
What is gas law?
According to the gas law, the pressure of a gas generally directly proportional to its temperature at a fixed volume.
Gas law can be represented as:
[tex]P_{1} V_{1}/ T_{1} = P_{2} V_{2} / T_{2}[/tex]
Calculation of volume with the aid of gas law:
It is given that, [tex]P_{1}[/tex] = 45.8 kPa, [tex]P_{2}[/tex] = 99.3 kPa , [tex]T_{1}[/tex] = 57.2°C, [tex]T_{2}[/tex] = 112.3°C, [tex]V_{1}[/tex] = 115 mL .
Now, put the values of given data in gas laws equation.
(45.8kPa)(115mL)/(330K)= (99.3kPa)([tex]V_{2}[/tex])(385.3K)
[tex]V_{2}[/tex] = 61.9 mL
Therefore, the volume will be 61.9 mL .
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1pt which blood vessel carries waste-rich blood from the capillaries back to the healt?
O A. vein
OB. neuron
O C. vena cava
OD. aorta
What are some facts about Radon something that is unique and relatively unknown by the general population???? Helpppppp helpppppp
Answer: Radon is radioactive
Explanation: thats all i know
Which of the following is true of squalene, a hexa-unsaturated hydrocarbon
with a formula of C₃₀H₅₀, which melts at – 5°C and boils at 285 °C?
Answer: The alkyne
Explanation:
Answer:
the alkyne
Explanation:
Hope it helps u
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how can a chemical reaction be compared to shuffling a deck of cards?
Answer:
The cards (matter) can be rearranged constantly, placed with others, the total or resent amount remains constant.
Explanation:
A chemical reaction be compared to shuffling a deck of cards then the cards can be rearranged constantly, the total amount remains constant.
What is chemical reaction ?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.
We can learn about a substance's qualities by studying chemical reactions. We can learn about a substance's chemical characteristics by looking at how it interacts with other substances. These characteristics can be utilized to recognize an unidentified sample.
When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
Thus, A chemical reaction be compared to shuffling a deck of cards then the cards can be rearranged constantly, the total amount remains constant.
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How is a water wave similar to a pendulum?
Answer:
side to side?
Explanation:
help help help help help
What is an action your citizens can take to prevent water waste?
How can genetic mutations be passed to offspring?
A. In sex cells
B. In body cells
C. Through environmental factors
D. Through animal transmission factors
Answer:
I think the answer is b
Explanation:
I hope this helps
A gas sample has a volume of 300.0 L when under a pressure of 3atm. What is the
new volume iſ the pressure is increased to 4 atm while the temperature is held
constant?
200L
225L
300L
900L
Answer:
V1P1=V2P2
300*30=x*40
900=40x
decide both side by 40to be left by volume x
900÷40=x
x=225L
Which indicator would tell scientists the most about future climate change
Speed is the rate of change of position expressed as _____ traveled per unit of time. A. direction B. meter C. displacement D. distance
Answer. Speed is the rate of change of position expressed as distance travelled per unit of time
give brainliest if right
Answer:
distance
Explanation:
A block of aluminum occupies a volume of 15.0 mL and weighs 45 grams.
Select the correct answer.
Which of the following is true for a heating curve?
Ο Α.
It shows how the pressure of a substance changes when heated.
OB.
It shows how the temperature of a substance changes when heated.
OC.
It shows how the volume of a substance changes when heated.
It shows how the mass of a substance changes when heated.
OD
Reset
Next
Answer:
the answer is b: it shows how temperature of a substance changes when heated
What is the difference between a cup of tea at 95°C, and a drop of tea at 95°C?
Answer:
See the explanation below
Explanation:
Both the cup of coffee and drop of coffee have the Same temperature of 95°C.
Although the difference is the cup of coffee has more heat contained in it than the drop of coffee. An explanation is when we heat a cup of coffee it will take more time to Attain in 95°C while the drop of coffee will take less time
How long does it take for fruit flies to develop from embryos to adults?
what is the name of the chemical used for bleach in sugar industries?
Answer:
Sulfur Dioxide
Explanation:
Sulfur dioxide is the chemical that, when released by factories using fossil fuels, combines with the atmosphere and can produce acid raid.
If I dilute 250 mL of 0.50 M lithium acetate solution to a volume of 750 mL, what will the concentration of this solution be?
Answer:
The right answer is "0.17 M".
Explanation:
The given values are:
Volume,
V₁ = 250 mL
V₂ = 750 mL
Molarity,
M₁ = 0.50 M
M₂ = ?
As we know,
⇒ [tex]M_1 V_1=M_2 V_2[/tex]
or,
⇒ [tex]M_2=\frac{M_1 V_1}{V_2}[/tex]
On substituting the values, we get
⇒ [tex]=\frac{0.50\times 250}{750}[/tex]
⇒ [tex]=\frac{125}{750}[/tex]
⇒ [tex]=0.17 \ M[/tex]
Sodium oxide reacts with water to make sodium hydroxide.
1. Write and balance the equation.
2. List all the mole ratios.
3. How many moles of water are needed to react with 18.4 moles of sodium oxide?
4. How many grams of sodium hydroxide are formed when 4.5 moles of sodium oxide react with excess water?
5. How many grams of water are needed to make 5.65 moles of sodium hydroxide?
6. How many grams of sodium hydroxide are formed when 23.7 g of sodium oxide react with excess water?
7. How many liters of water are required to form 93.4 g of sodium hydroxide?
Answer:
So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.
Explanation:
Cuando se trata Ca3P2 con agua, los productos son Ca(OH)2 y PH3. Calcular el peso máximo obtenido al reaccionar 2 g de Ca3P2 con 1 g de H2O.
Answer:
0.629 gramos de PH3 es la máxima de cantidad que puede ser producida.
Explanation:
¡Hola!
En este caso, dado que tenemos la siguiente reacción química, la cual se puede balancear directamente:
[tex]Ca_3P_2+6H_2O\rightarrow 3Ca(OH)_2+2PH_3[/tex]
Podemos calcular la masa máxima de cualquier producto, digamos PH3, al comparar la masa de este, que 2 g the Ca3P2 y 1 g de H2O producen por separado y de acuerdo a la estequiometría:
[tex]2gCa_3P_2 *\frac{1molCa_3P_2 }{182.18gCa_3P_2 }*\frac{2molPH_3}{1molCa_3P_2 } *\frac{34gPH_3}{1molPH_3 } =0.747gPH_3\\\\1gH_2O *\frac{1molH_2O }{18.02gH_2O}*\frac{2molPH_3}{6molH_2O} *\frac{34gPH_3}{1molPH_3 } =0.629gPH_3[/tex]
De este modo, infermos que solamente 0.629 gramos the PH3 pueden ser obtenidos al ser el agua el reactivo límite.
¡Saludos!
how many moles are in 37.5 g nitrogen