Answer:
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
Explanation:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
3H₂O → 3H₂ + 3O₂
This equation do not follow the law of conservation of mass because there are more oxygen atoms on right side so mass is not conserved.
C₂H₄ + 3O₂ → 2CO₂ + 2H₂O
This equation follow the law of conservation of mass because there are equal number of atoms of all elements on both side of equation.
C + 4H₂ → CH₄
This equation do not follow the law of conservation of mass because there are more hydrogen atoms on left side of equation so mass is not conserved.
2Na + Cl → NaCl
This equation also do not follow the law of conservation of mass because there are more sodium atoms on left side of equation so mass is not conserved.
If you observed a beam of particles being bent towards a negatively
charged plate, what might you conclude?
Answer:
The particles did not have a positive charge.
classify the following chemical reaction
2Li + Cu(No3)2 → Cu + 2 LiNO3
Answer:
im on this question i need help with it as well lol
Explanation:
PLEASE HELP MEEE!!!!!!!!!
-If you took a sample of Aluminum and reduced it to the smallest possible particles of pure aluminum, what would you be left with?
Answer:
It can be described as an atom
In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?
a. In, 49 protons, 49 electrons
b. Zn, 30 protons, 60 electrons
c. F, 19 protons, 19 electrons
d. Cs, 55 protons, 132.9 electrons
In the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly in In, 49 protons, 49 electrons. option A is correct.
What are protons and electrons?The protons contain the maximum mass of any atom or molecule they are present at the nucleus of the atom as the mass is focused at the center only they are positively charged species and greater in mass as compare to electrons.
Electrons are the negatively charged species and they rotate at the given shells or orbits around the nucleus they are negligible in mass as compare to protons but can effect the size of any element.
To specifies the size of an atom the number of protons and electrons of every atom in the periodic table is same.
Therefore, the number of protons, and the number of electrons given correctly in In, 49 protons, 49 electrons. option A is correct.
Learn more about protons and electrons, here:
https://brainly.com/question/1421805
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What type of organic molecule is this?
Answer:
It's a lipid
Explanation:
have a good day, good luck!
At standard pressure, the total amount of heat required to completely vaporize a 100. gram sample of water at its boiling point is
Answer:
The heat of vaporization relates the amount of heat required to transform a certain phase of a certain amount of substance from liquid to gas. The heat of vaporization of substances can be expressed in terms of joules per gram or joules per mole.
ExplanaDetermine the total amount of heat, q, that is required to evaporate the given amount of water at its boiling point. For this problem, we simply apply the equation,q
=
m
Δ
H
v
a
p
where m is the mass and
Δ
H
v
a
p
is the enthalpy of vaporization of water. We use the following values:
m
=
100
g
Δ
H
v
a
p
=
2.26
k
J
/
g
We proceed with the solution.
q
=
m
Δ
H
v
a
p
=
(
100
g
)
(
2.26
k
J
/
g
)
=
226 k
j tion:
I need help with this
Answer:
To fulfill the octet rule
Explanation:
.
Which of these halogens is the least reactive
on the Period Table?
1) I 2) Br 3) CI 4) F
Answer:
Chlorine I guess.
Explanation:
none
How many molecules of carbon dioxide are found in 2.50 moles of carbon dioxide?
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
There are 1.51 x 1024 molecules of carbon dioxide in 2.50 moles of carbon dioxide.
Explanation:
Which substance has the highest density at room temperature?
a.
Hydrogen
c.
Water
b.
Oxygen
d.
They are all the same
The correct answer is Water
Water is the most dense compound of all the mentioned ones. Hydrogen and Oxygen are gasses.
What is a chemical bond?
A. An attractive force between 2 molecules
B. A gravitational force holding electrons in their orbits
C. An intramolecular force holding 2 atoms together
D. An electrostatic force betwipen a proton and an electron
Answer:
your answer is (C)
I hope it's helps you
Answer:
[tex]c)intermolecular \: force \: holding \: \\ two \: atom \: togather \\ thank \: you[/tex]
When using a dichotomous key, it is ok to start wherever you want.
True
O False
Answer:
False
Explanation:
Pay attention to the specimens you are trying to identify with your dichotomous key. List down the characteristics that you can notice. For example, say you are trying to classify a group of animals. You may notice that some have feathers whereas others have legs, or some have long tails and others don’t.
What is the atomic number of zirconium?
39
40
41
4
Answer: 40
Explanation: On your periodic table the number above the element(the number is still inside the box) is the atomic number. It is also the protons for that element. This applies to every element
Which statements best describe the first stage of cellular respiration? Check all that apply.
The stage happens in cytoplasm.
The stage happens in mitochondria.
Oxygen combines with small molecules.
Glucose is broken down.
Energy is released.
( 20 points) HELP ME QUICK IM TIMED
Answer:b
Explanation:
Answer:
The correct answer is The stages happens in the cytoplasm.
Explanation:
Explanation:Cellular respiration helps in the complete breakdown of carbohydrates basiclly glucose to form carbon dioxide,water and ATP molecules as energy source.Aerobic respiration consist of 3 principle steps
The first step is called glycolysis which deals with the catabolism of glucose into pyruvate by 10 enzymes catalyzed reactions.
Glycolysis occurs in the cytoplasm as many of the glycolytic enzymes are present in the cytoplasm of the cell in which the glycolysis is occuring.
About two centuries ago Ben Franklin showed that 1 teaspoon of oil would cover about 0.5 acre of still water. If you know that 1.0x10^4 m^2 = 2.47 acres, and that there is approximately 5 cm^3 in a teaspoon, what is the thickness of the layer of oil?
Answer:
Explanation:
2.47 acre = 10⁴ m²
.5 acre = .2024 x 10⁴ m²
= 2024 m²
volume of oil = 5 x 10⁻⁶ m³
If thickness be t
volume of oily layer = area x thickness
= 2024 x t = 5 x 10⁻⁶
t = 5 x 10⁻⁶ / 2024
= 2.47 x 10⁻⁹ m
= 2.47 nm .
A gas is composed of individual particles which are in constant?
Answer:
Gases consist of particles (molecules or atoms) that are in constant random motion. Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions.
Explanation:
hope it helps
Which object has the most potential energy? A ball resting on the ground. A ball being thrown at 100 miles per hour. A ball on top of a refrigerator. A ball resting on the edge of a cliff.
Answer:
The correct option is a ball resting on the edge of a cliff.
Explanation:
A ball resting on the edge of a cliff is the correct option because it has the most potential energy and this is because potential energy is the energy stored by an object or energy posses by an object due it is position. It is the energy at rest.
A ball resting on the edge of a cliff indicate that the ball is a t rest, and it's possess energy base on its position relative to it's zero position.
Answer:A ball resting on the edge of a cliff.
Explanation:
1s2 2s2 2p6 3s2 3p6 Atoms of an element, X, have the electronic configuration shown above. The compound most likely formed with magnesium, Mg, is..... (a) MgX (b) Mg2X (c) MgX2 (d) MgX3 (e) Mg3X2
The question is incorrect, the correct question is:
1s2 2s2 2p6 3s2 3p3
Atoms of an element, X, have the electronic configuration shown above. The compound most likely formed
with magnesium, Mg, is
a. MgX
b. Mg2X
c. MgX2
d. Mg2X3
e. Mg3X2
Answer:
e. Mg3X2
Explanation:
Let us reexamine the electronic configuration of atom X; 1s2 2s2 2p6 3s2 3p3 .
This implies that it is a member of group 15 whose outer electronic configuration is ns2 np3. Members of group 15 have a valency of 3.
Therefore, during exchange of valence, the subscript of X becomes 2 (valency of magnesium) and the subscript of Mg becomes 3(valency of X).
Hence the formula is Mg3X2 as shown in the answer.
The branch of science which deals with chemicals and bonds is called chemistry.
The correct option is D.
The representation of electrons in their shell is called electronic configuration. To find the element we have to count the electrons in it.
The total number of electrons is 2+2+6+2+6 = 18 which is argon a noble gas element.
The valency of the magnesium is 3, Hence the compound they will make is[tex]MgAr_3[/tex].
Hence the correct option is D that is MgX3.
For more information, refer to the link:-
https://brainly.com/question/25026730
Which of the following is/are TRUE about heat transfer?
w. heat energy can never be transferred.
x. heat flows from cooler to hotter object.
y. heat travels from hotter to cooler object.
z. heat can transfer through convection, conduction, and radiation
Group of answer choices
x and y
y and z
w and z
w and x
A gas has an initial volume of 2.4 L at a pressure of 1.5 atm and a temperature of 273 K. The pressure of the gas increases to 4.5 atm, and the temperature of the gas increases to 313 K. What is the final volume of the gas? 0.70 L 0.92 L 6.3 L 8.3 L
Answer:
Final volume of the gas v2 = 0.92 L (Approx.)
Explanation:
Given:
Initial volume v1 = 2.4 L
Pressure p1 = 1.5 atm
Temperature t1 = 273 K
New pressure p2 4.5 atm
New temperature t2 = 313 K
Find:
Final volume of the gas v2
Computation:
p1v1 / t1 = p2v2 / t2
(1.5)(2.4) / 273 = (4.5)(v2) / 313
v2 = 0.9172
Final volume of the gas v2 = 0.92 L (Approx.)
Nickel is produced during stellar fusion.
O True
O False
El amoniaco se descompone en nitrógeno e hidrógeno, ambos en estado gaseoso. N=14 H=1 Calcula los moles de hidrógeno que se desprende en la descomposición de 68 g de amoníaco.
Answer:
Se desprenden 12 moles de hidrógeno.
Explanation:
Para saber la estequiometría de esta reacción, primero debemos escribir la ecuación y balancearla de tal modo que de ambos lados de la flecha de reacción haya la misma cantidad de átomos (ésta es la ley de conservación de la masa). Entonces tenemos:
[tex] 2 NH₃ (l) → N₂ (g) + 3 H₂ (g) [/tex]
Una vez que tenemos la reacción balanceada, pordemos observar que 2 moles de amoníaco se descomponen en un mol de nitrógeno y 3 de hidrógeno, respectivamente.
Sabiendo que la masa molar del amoníaco es 17 g, pasamos el valor de 68 g a moles de amoníaco:
17 g NH₃ ------- 1 mol
68 g NH₃ ------ x= 4 mol
Ahora que tenemos este valor en moles, podemos usar la estequiometría de la reacción para calcular cuántos moles de hidrógeno se desprenden:
1 mol NH₃ ------ 3 mol H₂ (dato teórico obtenido de la ecuación)
4 mol NH₃ ------ x= 12 mol H₂
Por ende, en la descomposición de 68 g de amoníaco (o lo que es lo mismo, 4 moles de amoníaco) se desprenden 12 moles de hidrógeno.
Complete the passage to describe velocity vs time graphs.
A velocity vs time graph is a graph that shows the relationship between the velocity of an object over time.
is plotted on the x-axis in seconds, and the
of the object is plotted on the y-axis in
meters per second.
Intro
Done
Answer:
20.6 kg
Explanation:
Answer:
20.6 kg
Explanation:
Balance the following equation: H2O(l) → H2 (g) + O2 (g)
Answer:
2 H2O(l) → 2 H2(g) + O2(g)
Explanation:
H2O(l) → H2 (g) + O2 (g)
Add 2 to both sides:
Reactants: Products:
H: 2+2=4 H: 2+2=4
O: 1+1=2 O:2
2 H2O(l) → 2 H2(g) + O2(g)
Therefore it is balanced, hope this helps.
plz choses one of the answer choices
Answer:
B
Explanation:
It adds so there are 4 aluminum on both sides as well as 6 oxygen on both sided.
Answer:
B. would be the correct option.
Explanation:
To balance the equation, both the reactant and product must have the same number so with 4Al+30 with two on the bottom, you would get a total of 4 Al atoms and 6 O atoms. Now, the other side must have 4 Al atoms and 6 O atoms, so multiply them by 2 and that would be your answer.
All of these elements are metals except?
Metals
1. Copper
IronGoldLeadAluminumSilverZincTinNon metals
CarbonSulfurOxygenHydrogenNitrogenExplanation:
Hope this helps!!!
Which of the following elements has the highest electronegativity?
A.
Boron (B)
B.
Carbon (C)
C.
Oxygen (O)
D.
Nitrogen (N)
Answer:
C. Oxygen
Explanation:
By looking at the periodic table.
As you look from left to right of the periods the electronegativity increases.
As well as from the bottom to the top of the groups it increases.
Which of these elements has stronger
metallic characteristics than aluminum?
1) He
2) Mg
3) Ga
4) Si
Answer:
Answer is 2) Mg
Explanation:
Mg has a some metallic characteristic that might be stronger than aluminum if you see it on the periodic table or on a computer
What mass does 2.41 moles of copper have?
A 632 g
B 280 g
C 153 g D 352 g
E 820 g
mark brainlest if right
Answer:
The answer is 1
Explanation:
I got this answer right.