Answer:
V = 10.3 L
Explanation:
Given data:
Mass of methane = 6.40 g
Volume of CO₂ produced = ?
Temperature = 35°C (35+273 = 308 K)
Pressure = 100.0 KPa (100.0/101 = 0.98 atm)
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of CH₄:
Number of moles = mass/molar mass
Number of moles = 6.40 g/ 16 g/mol
Number of moles = 0.4 mol
Now we will compare the moles of CO₂ with CH₄.
CH₄ : CO₂
1 : 1
0.4 : 0.4
Volume of CO₂:
Formula:
PV = nRT
0.98 atm ×V = 0.4 mol ×0.0821 atm.L/mol.K × 308 K
0.98 atm ×V = 10.11 atm.L
V = 10.11 atm.L /0.98 atm
V = 10.3 L
If you have a bottle with Helium & Nitrogen at room temperature, how do the speed of the particles compare?
Answer:
The Helium particles will be faster than the Nitrogen particles
Explanation:
This is because the particles of both elements have the same average kinetic energy (they are at the same temperature), but Nitrogen atoms are heavier than Helium atoms, and therefore they move slower in accordance to Newton's second law of motion, f=ma. The larger massed Nitrogen atoms take more energy to move so they are slower because both particles have the same energy.
Look at the periodic table in number 1. Boron (B), Aluminum (Al), Silicon (Si), Germanium (Ge), Arsenic(As), what can be said about these elements that border the zigzag line on the table? They are _____________ *
A.) Noble Gases
B.) Metals
C.) Nonmetals
D.) Metalloids
Answer: Metalloids
Explanation:
covalent compound formula for hydrogen monochloride
Answer:
HCl
Explanation:
1 hydrogen 1 chlorine
Please hurry i really need it fast
True or false during reactions or light is needed carbon dioxide is converted to glucose
Answer:
True
Explanation:
The atomic mass unit is based on which element?
Carbon-12
Carbon-12 is the reference for all atomic mass calculations. An atomic mass unit is defined as a mass equal to one twelfth the mass of an atom of carbon-12.
A block with a volume of 24 cm3 has a mass of 1200 g. What is the density of this block
Answer:
The answer is 0.02 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{24}{1200} = \frac{1}{50} \\ [/tex]
We have the final answer as
0.02 g/cm³Hope this helps you
What are some chemical changes in hydrogen?
Hydrogen changes from a gas to a liquid at a temperature of -252.77°C (-422.99°F) and from a liquid to a solid at a temperature of -259.2°C (-434.6°F). It is slightly soluble in water, alcohol, and a few other common liquids.
Evaluating Lewis Structures
Explain what is wrong with the following structure.
An upper H is single-bonded to a H to the right, which is single bonded to an upper O with pairs of dots above, to the left, and below.
Answer:
Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time.There are too many electrons in the final structure.
Explanation:
Answer:
Explanation:
Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time. There are too many electrons in the final structure.
Question 6 (1 point)
How much heat, in calories, is necessary to boil 55g of ice at 100 Celcius?
Heat of Vaporization: 540 cal/g
Heat of Fusion: 80 cal/g
a
OO
С
8000
54000
5500
4400
29700
OC
e
Answer:
The correct option is;
d 4400
Explanation:
The given parameters are;
The mass of the ice = 55 g
The Heat of Fusion = 80 cal/g
The Heat of Vaporization = 540 cal/g
The specific heat capacity of water = 1 cal/g
The heat required to melt a given mass of ice = The Heat of Fusion × The mass of the ice
The heat required to melt the 55 g mass of ice = 540 cal/g × 55 g = 29700 cal
The heat required to raise the temperature of a given mass ice (water) = The mass of the ice (water) × The specific heat capacity of the ice (water) × The temperature change
The heat required to raise the temperature of the ice from 0°C to 100°C = 55 × 1 × (100 - 0) = 5,500 cal
The heat required to vaporize a given mass of ice = The Heat of Vaporization × The mass of the ice
The heat required to vaporize the 55 g mass of ice at 100°C = 80 cal/g × 55 g = 4,400 cal
The total heat required to boil 55 g of ice = 29700 cal + 5,500 cal + 4,400 cal = 39,600 cal
However, we note that the heat required to vaporize the 55 g mass of ice at 100°C = 80 cal/g × 55 g = 4,400 cal.
The heat required to vaporize the 55 g mass of ice at 100°C = 4,400 cal
How does friction play a role in acceleration?
Answer:
Friction always acts in the direction opposing motion. This means if friction is present, it counteracts and cancels some of the force causing the motion (if the object is being accelerated). That means a reduced net force and a smaller acceleration. ... More friction and the puck slows to a stop faster.
Explanation: LET ME IF IM WRONG!!!!! HAVE A NICE DAYYYYYY
Sugar water tastes sweet but is still colorless. Physical or chemical property?
How many electrons does the Lewis structure for phosphorus trifluoride have?
Answer:
In the Lewis structure for PF3 there are a total of 26 valence electrons. Three pairs will be used in the chemical bonds between the P and F.
Explanation:
Which of the following is a balanced equation for the reaction described below?
Aqueous copper (II) chloride reacts with solid aluminum to produce aqueous aluminum chloride and solid copper.
A) CuCl2(aq) + Al(s) = AlCl3(aq) + Cu(s)
B) 3Cu2 Cl(aq) + Al(s) = AlCl3(aq) + 6Cu(s)
C) CuCl(aq) + Al(s) = AlCl(aq) + Cu(s)
D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
From the question,
We are to determine which of the given equation for the described reaction is balanced.
The described reaction is the reaction between aqueous copper (II) chloride and solid aluminum to produce aqueous aluminum chloride and solid copper.
That is,
CuCl₂(aq) + Al(s) = AlCl₃(aq) + Cu(s)
Now, we will balance the above equation, using the smallest whole number coefficients
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s)
Hence, the balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
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Which equation describes a reduction?
A- Upper M g (s) right arrow Uper M g superscript 2 plus (a q) plus 2 e superscript minus.
B- 2 upper C l plus 2 e superscript minus right arrow 2 upper C l superscript minus.
C- Upper N a (s) right arrow upper N a superscript plus (a q) plus e superscript minus.
D- Upper A l (s) right arrow upper A l superscript 3 plus (a q) plus 3 e superscript minus.
Answer:
b
Explanation:
Reduction is the process of gaining of electron. The equation that describes a reduction is option b, Cl reduces Cl- by accepting an electron.
What is reduction ?Reduction is the process of reaction with hydrogen or accepting one or more electrons. In reduction, a species reduces to its lower oxidation state. The process of losing electron is called oxidation. Elements forms their higher oxidation states in oxidation state.
Mg metal loses its two electron giving Mg²⁺ , Na metal loses its one electron giving Na+ are all oxidation. Similarly Al metal giving Al³⁺ ions is oxidation.
Atoms when gain electron, they acquire negative charges. Cl have 7 valence electrons and it need one more electron to achieve octet. Hence it gains an electron forming its lower oxidation state Cl⁻. Here, oxidation state decreases from 0 to -1.
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WILL GIVE BRAINLIST IF RIGHT
While visiting Thor's Hammer in Bryce Canyon National park, you observe red coloring on the landform. What natural process most likely caused the red coloring? (4 points)
Chemical weathering
Deposition
Erosion
Mechanical weathering
Answer:
Chemical weathering because the landform changed color
Explanation:
Answer: A) Chemical Weathering
Explanation:
I took the test :)
Which element below would have a 3+ charge as an ion?
Answer:
Al3+
Explanation:
Aluminium has an electronic configuration of 2, 8, 3 and the outermost valence electrons is +3 since it is a metal
Elements acquire positive or negative charges by losing or gaining electrons. The element which have 3+ charge among the options is boron (B) Hence, option B is correct.
What is boron?Boron is 5th element in periodic table and it is classified into 13th group. Boron is a metalloid and shows properties intermediate to metals and non metals.
The electronic configuration of boron is K =2, N =3. Atoms lose or gain electrons as per their valency to become stable. According to octet rule atoms become stable when their valence shell get completely filled.
Boron have 3 electrons in its valence shell. If it donate these three electrons into an electronegative atom, its K shell become its valence shell and it is completely filled. Thus boron becomes stable.]
When atoms loses electrons they acquire positive charge and this charge is numerically equal to the number of electrons lost. Thus boron acquire 3 unit of positive charge by donating its 3 electrons. Hence, option B is correct.
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Your question is incomplete. But your complete question probably was :
Which element below would have a 3+ charge as an ion?
answer choices.
nitrogen (N).
boron (B).
silicon (Si).
argon (Ar)
schroedinger thought that electrons
Answer:
In Niels Bohr's theory of the atom, electrons absorb and emit radiation of fixed wavelengths when jumping between fixed orbits around a nucleus. The theory provided a good description of the spectrum created by the hydrogen atom, but needed to be developed to suit more complicated atoms and molecules.
Explanation:
why gold is called inert metal
Gold has a heavy enough nucleus that its electrons must travel at speeds nearing the speed of light to prevent them from falling into the nucleus. This relativistic effect applies to those orbitals that have appreciable density at the nucleus, such as s and p orbitals. These relativistic electrons gain mass and as a consequence, their orbits contract. As these s and (to some degree) p orbits are contracted, the other electrons in d and f orbitals are better screened from the nucleus and their orbitals actually expand.
Since the 6s orbital with one electron is contracted, this electron is more tightly bound to the nucleus and less available for bonding with other atoms. The 4f and 5d orbitals expand, but can't be involved in bond formation since they are completely filled. This is why gold is relatively unreactive.
Hope it helps
Gold is relatively inert metal because, the one valence electron in 6s orbital is not available for bonding since it is more attracted by nucleus. The 4f and 5d orbitals are completely filled and does not involve in bonding.
What is inertness ?Some elements tends to be unreactive compared to the other by their extra stability factors. This unreactness is called inertness. The 18th group elements are all inert since they are highly stable due to completely filled electronic configuration.
Gold is 79th element in periodic table. It is a transition metal located in d-block. The electronic configuration of gold is [Xe] 4f¹⁴ 5d¹⁰ 6s¹. There is only valence electron which is in the 6s orbital.
The 4s orbital experience more nuclear pull which leads to the unavailability of the valence electron. The 4f and 5d orbitals are completely filled and does not involve in chemical bonding. That's why gold is called inert metal.
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Convert 45 mm to centimeters.
Answer:
4.5cm
Explanation:
Answer:
4.5 centimeters
Explanation:
1 mm = 0.1 centimeters
45 x 0.1 = 4.5
Why does the salt reappear when the water evaporates??
Answer:
Salt particles move about the water. Each particle is surrounded by water molecules.The water particles (molecules) keep the salt particles from rearranging themselves back into a salt crystal. Salt particles are carried throughout the solution surrounded by water particles.
As the water evaporates less and less water molecules are present to keep the salt particles apart. The salt therefore recrystalises and can be collected.
Explanation:
Hope this helped!
-B
Which bond has one sigma and two pi bonds?
a
b
c
Answer:
It is letter B.
Explanation:
believe my answer cause I answered this kind of question in ny exam
The octet rule states that the formula for a compound is derived by Group of answer choices having a net charge of magnitude 8. using a minimum of 8 atoms. using exactly 8 bonds in the formula unit. having all atoms or ions get noble gas electron configurations.
Answer:
Atoms bonds with 8 electrons
Explanation:
Octet rule is a chemical rule that shows elements in main group bond so that each atom have 8 valence electrons in the outmost shell which make them to have similar electronic configuration with Noble gases This is important because the sharing of electrons make atoms to have full shell. Atoms with electrons not up to 8 react with more stable compound.
halppp can anyone come up with a slogan for anti smoking
Answer:
"Your Choice: Liberation From Your Own Choices or Continue the Choice That Decreases Your Liberation."
Explanation:
Liberation is the freeing or release from something restraining you. In this case, smoking holds you back from doing the things you used to do.
It's not that creative, but I hope this is good enough for you! :D (don't smoke)
deposition examples?
The most typical example of deposition would be frost. Frost is the deposition of water vapour from humid air or air containing water vapour on to a solid surface. Solid frost is formed when a surface, for example a leaf, is at a temperature lower than the freezing point of water and the surrounding air is humid.
2 examples of foods fermented by yeast
A teacher wrote the following part of a balanced chemical equation: Cu+2AgNO 3 To show the conservation of matter in the chemical reaction , how many silver (Ag) atoms will be needed on the right-hand side of the balanced equation ?
What is the electron configuration silver, Ag? exeception
Answer
2,8,18,18,1
Explanation:
(PLSSS HEELP)Which landform is created by wind?
Delta
Desert gravel
Horns
Oxbow lake
Answer:
Desert gravel
Explanation:
A desert is an arid region where precipitation is very low all year round.
Wind action such as erosion, transportation and deposition is the most active denudation force in this sort of terrain.
Desert gravel is one of such feature pronounced in a desert area. They form by the gradual removal of the fines which are the sandy and clay sized particles. This now leaves the coarser particles behind. Desert gravel forms as a result of wind erosion.Answer: B
Explanation:
Sugar is dissolved in water but when the water is evaporated off, the sugar crystals reform again. Chemical change or physical change?
Answer:
chemical
Explanation:
physical change has to do with the five scenes
