Answer: 46.875%
the moles of C2H6 is 32/(12.2+6) = 16/15 (mol)
the moles of CO2 is 44/(12 + 16.2) = 1 (mol)
have:
2C2H6 + 7O2 ⇒ 4CO2 + 6H2O
0,5 <= 1
=> C2H6 reacts 0.5 mol
=> H = [tex]\frac{0.5}{\frac{16}{15} }.100=46.875[/tex]%
Explanation:
may we met again !
i love you,ella
Answer: When I see you again!
Explanation:
7)
Mg(s) + 2 HCl(aq) + MgCl2(aq) + H2(g)
What type of reaction is shown above?
A)
decomposition
B)
double replacement
C)
synthesis
D)
single replacement
Answer:
D) single replacement
Explanation:
Given reaction:
Mg + 2HCl → MgCl₂ + H₂
The reaction shown above is a single displacement reaction.
In a single displacement reaction, a more reactive atom displaces another from a given compound.
The comparison here is between Mg and H.
On the activity series, Mg is higher and more reactive, it will displace H from the solution of HCl. This
This reaction type is called a single replacement reaction.
Given a balanced chemical equation it is always possible to determine
A)
the physical state of the products and reactants
B)
whether a reaction will or will not take place
C)
the relative number of moles taking part in the reaction
D)
the conditions necessary for the reaction to take place
Answer:
C) the relative number of moles taking part in the reaction
Explanation:
From a balanced chemical equation, it is always possible to determine the relative number of moles taking part in a chemical reaction.
The number of moles is the amount of the reacting specie that makes up a chemical reaction.
In balanced chemical equation, the number of moles of reactants and products must be the same. From this understanding, we can determine the amount of reactants and products needed for a chemical reaction to take place.Please help I really need but this time I'm fr I don't have much time ill mark brainliest
Answer:
i fi am not wrong the correct answer is D
Explanation:
Answer:
The answer is D
Explanation:
More height= more potential energy
Calculate the wavelength of radiation with a frequency of 4.9 ×1014 per second.
Answer in units of meters.
The wavelength-λ = 6.12 x 10⁻⁷ m
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸ m/s
λ = wavelength
The wavelength of radiation with a frequency of 4.9 ×10¹⁴/s :
[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{4.9\times 10^{14}}\\\\\lambda=6.12\times 10^{-7}~m[/tex]
What was J.J. Thomson's Model known as?
A. The Pizza Model
B. The Chocolate Chip Model
C. The Mint Chocolate Chip Model
D. The Butterscotch Model
Answer:
B.The Chocolate Chip Model
Explanation:
Which is an alkaline earth metal?
Answer:
actually there are 6 of them
Explanation:
heres the list:
They are beryllium, magnesium, calcium, strontium, barium, and radium.
hope it helpssss :)
Answer/Explanation:
Alkaline earth metals are similar to Alkali Metals, but they tend to to be harder, denser, and less reactive. However it is too reactive to be found in nature. It is commonly found in batteries, fireworks, flashlights, and cameras. It has Valence Electrons of 2 and the elements in this category are:
Beryllium BeMagnesium MgCalcium CaStrontium SrBarium BaRadium RaIn the reaction 2AgI + Na2S → Ag2S +2NaI, calculate the number of moles of AgI needed to react with 85.0 g
Answer:
8.5gNaI × 1molNaI/78gNaI × 234.7g AgI / 1 MOL AgI × 2Mol Ag I / 1mol Na2S=51.2 g of AgI reacts with Na2 SExplanation:
conversion factor is used to make sure that all the units cancels with the other units and we only remain with the mass of Ag I which is 51.2g but since the number of moles can be calculated by dividing with the relative molecular mass therefore 51.2g/234.7gmol=0.22mol
What are three physical properties that could be used to identify gold?
Answer:
solid ,hard, not see through
Explanation:
Answer:
There are many properties out there, so three include bright yellow color, luster shine, and the maleability that determines the durability.
what type of weather forecasting can forecast from 3-7 days? I NEED ANSWERS FAST!!!
Answer:
WPC medium range forecasting
Explanation:
can you pls help me with this question
Answer:
probably c
Explanation:
Answer: I feel like the correct answer is choice C but I really don’t know how to explain it..
PHYSICAL SCIENCE PLEASE PLEASE HEP DUE TODAY AT 11!! will give brainly if its correct!! <3333 thank you so muchh!!
Which problem cannot be solved using the scientific method?
determining which student reads faster
discovering who invented the radio
discovering how much salt should be used to boil water faster
determining which laundry detergent works best
Answer:
I would say discovering who invented the radio.
Explanation:
The other ones can be solved by experiments and the "discovering who invented the radio" cannot be solved by an experiment.
hope this helps.
Answer:
I would say who invented the ratio
Explanation:
Well you dont need to use the scientific method to know WHO discovered it, you use it to determine HOW
Evaluate each statement and determine which statement is not a determining factor in the formation of intrusive igneous rocks? Group of answer choices Magma cools very fast beneath the Earth's surface None of these Slow cooling allows large crystals to grow The Earth's interior has very high temperatures
Answer: The statement that is not a determining factor in formation of intrusive igneous rocks is 'None of the above' and Magma cools very fast beneath the Earth's surface.
Explanation:
Rocks are naturally occurring solid materials that are made up of different types of minerals which affects it's texture and colours. The three main types of rocks are:
--> sedimentary rocks,
--> metamorphic rocks and
--> igneous rocks.
Igneous rocks are formed from the crystallization and solidification of hot molten rocks which originates from deep within the earth. Depending on where the molten rock solidifies, the igneous rock is divided into two, namely:
--> intrusive igneous rock and
--> extrusive igneous rock.
The INTRUSIVE IGNEOUS rocks are formed within or deep beneath the earth surface when the hot magma SLOWLY cools over millions of years until it solidifies. The slow cooling allows large crystals to grow.
Therefore the statements (None of the above and Magma cools very fast beneath the Earth's surface) are not a determining factor.
How many moles are there in 5.2x10^23 atoms of CO2?
Answer:
0.86 moles of CO₂
Explanation:
Given data:
Number of atoms of CO₂ = 5.2×10²³ atom
Number of moles = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
5.2×10²³ atom× 1 mol / 6.022 × 10²³ atoms
0.86 mol
Which is the correct Lewis dot structure for BeH2 ?
The correct Lewis dot structure for [tex]BeH_2[/tex] is Be : H : H
What does the Lewis dot structure show?The Lewis dot structure shows the valence electrons as dots. The valence electrons of beryllium are shown as 2 dots on the left side of the atom.
The central atom, beryllium, has 2 valence electrons where each hydrogen atom has 1 valence electron. To form a stable molecule, beryllium shares its 2 valence electrons with the 2 hydrogen atoms, each of which shares its 1 valence electron with beryllium which gives each atom a full outer shell of electrons.
Learn more about Lewis dot structure at:
https://brainly.com/question/28652824
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The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.
Answer:
Explanation:
While trying to write the chemical formula for a compound (a neutral molecule), one must identify and exchange the charge of the cation with that of the anion to become the subscript of one other. For example
Aluminium oxide has Aluminium (Al) and oxygen (O); since Al has a charge of 3+ (the cation) and O has a charge of 2- (the anion), the compound would have it's charges as Al³⁺O²⁻ and when the charges are exchanged to there subscripts, it would form Al₂O₃; thus there would be two cations of aluminium for every three anions of oxygen in order to have a neutral molecule.
This same explanation can be given to Aluminium sulfite. Aluminium sulfite has Aluminium (Al) and sulfite (SO₃). Al has a charge of 3+ (cation) while sulfite has a charge of 2- (anion), with the compound having it's charges as Al³⁺(SO₃)²⁻ and when the charges are exchanged to there subscripts, it would form Al₂(SO₃)₃ and would thus have 2 cations of aluminium (Al³⁺) for every 3 anions of sulfite (SO₃³⁻) in order to have a neutral molecule.
Convert 27 degrees Celsius to Kelvin
OOK
300 K
O 27K
327 K
Answer:
300 K
Explanation:
add 273 to change to kelvin
plz mark as brainiest
whats the formula for density
p =[tex]\frac{m}{V}[/tex]
p equals m over V
hope this helps!!
P = density
m = mas
V = volume
Explanation:
easy
Can someone pls help
Goodbye Everyone, i will not be on here for awhile because of some things that i really rather not discuss but if you ask why then i guess i'll tell you but if you wanna say goodbye to me then please do so now!
Sincerly,Arri
Answer:
Which nuclear force holds the nucleus together against the mutual repulsion of the protons in every nucleus larger than Hydrogen’s?
Explanation:
Hi Arri, this is my question, if you cannot answer that it is fine. I hope you are doing well though :) best of luck to you when you are gone. Stay safe, well wishes
using the model, what is the mass of the atom pictured?
A) 3amu
B) 5amu
C) 7amu
D) 9amu
Answer:
A) 3amu
Explanation:
____ Ca3(PO4)2(s) + ____ H3PO4(l) → ____ Ca(H2PO4)2(s) When the equation above is balanced and all coefficients are reduced to lowest whole-number terms, what is the coefficient for H3PO4(l)
The equation can be balanced using suitable integers multiplied either side and can be written as follows:
[tex]\rm Ca_{3} (PO_{4})_{2} + 4 H_{3}PO_{4} \rightarrow 3 Ca (H_{2}PO_{4})_{2}[/tex]
Thus the coefficient of H₃PO₄ is 4.
What is balanced reaction?A balanced chemical equation of a reaction represents all the reactants and products in the perfect stoichiometric ratios where, the number of each element have to be equal in both sides.
The given reaction is an example of combination reaction. The equation can be balanced by equating the number of calcium in the product side by multiplying with 3 and then making the phosphate group also balanced by multiplying by 4 with H₃PO₄.
Thus, the balanced chemical equation written above contains 3 calcium on both side and equal number of phosphate group (6) as well as hydrogens on both side where, the coefficient of H₃PO₄ is 4
To find more on balanced reactions, refer here:
https://brainly.com/question/14263388
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A photon has a wavelength of 299 nm. What is the frequency of this photon?
1. 1×10^16 Hz
2. 1×10^15 Hz
3. 6.65 × 10^−37 Hz
4. 6.65 × 10^−28 Hz
5. 0.00100 Hz
6. 1.98 × 10^−31 Hz
7. 8.97 × 10^10 Hz
8. 1×10^6 Hz
9. 6.65 × 10^−18 Hz
The frequency(f) of this photon : 1 x 10¹⁵ Hz
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
A photon has a wavelength of 299 nm.
λ = 299 nm = 299 x 10⁻⁹ m = 2.99 x 10⁻⁷ m
The frequency :
[tex]\tt f=\dfrac{3.10^8}{2.99\times 10^{-7}}\\\\f=\boxed{\bold{1\times 10^{15}~Hz}}[/tex]
In a lever,E×E.D.=L×__________
Answer:
LD is a answer okkkkkkkkkkkkkkkkk
The periodic table includes all of the known elements in the world. How are elements
arranged on the periodic table?
a. by the element's name
b. by their atomic mass
c. by the number of neutrons found in the element
d. by their atomic number
Answer: D: by their atomic number
Explanation:
Elements are arranged from left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The rows are called periods
The illustration below shows the human skeletal system. Use the illustration to any questions at follow
Skull
Facial Cranium
bones
Clavice
Scapula
Humerus
Vertebral
column
Sternum
Una
Ribs
Radius
Sacrum
Carpals
Metacarpals
Phalanges
Tarsels
-Femur
-Patella
-Tibia
Fibia
Metatarsels
Phalanges
Using the illustration, which function do the bones of the skull mainly perfom?
A. They allow movement
B. They produce proteins
C. They protect tissues and organs
D. They connect muscles to tissues
im pretty sure its C, if im right please give me brainlist
The function where the bones of the skull mainly perfom should be that they protected the tissue and organs.
What is tissue and organs?Here the tissue and organs should be considered as the basic structural units with respect to the bodies.
Here the tissues should be comprise of the cell collections that have the same kind of function while on the other hand, the organ should be the tissue collections.
Therefore, it protected the tissue and organs.
learn more about tissue here: https://brainly.com/question/19031918
PLEASE HELP ASAP I NEED THIS THANK YOU SOO MUCH
which of the two chemical equations follow the Law of Conservation of Mass
Equation A: Zn +2HCl —> ZnCl2+ 2H2
Equation B: Zn +2HCl —> ZnCl2 + H2
Equation A: Zn +2HCl —> ZnCl2+ 2H2
Identify the charges = Mg2+ F1
Answer:
its called drop and swap
Explanation:
Part A Read each sentence. Write the letter of the correct answer on the line.
1. Which of the following would result in a chemical change?
A boiling water
C tearing paper
B burning wood
D melting wax
Use what you know about endothermic and exothermic reactions to explain the differences in the graphs above
Answer:
yes I do
But I can't see the question very well
Explanation:
