Answer: energy is transferred, but it can go to the products or the reactants.
Explanation: in a chemical reaction, the atoms and molecules that interact with each other are called reactants.
How many elements, compounds and atoms are in CH3COOH
How does the electron arrangement change moving vertically down a group?
Answer:
Electrons arrangement change is almost constant down the group, hence nuclear charge is almost constant.
But the energy levels on which electrons are arranged increase down the group, hence shielding or screening effect increases.
In a reaction, 2mol of oxygen reacts with 8g of ethane to produce carbon dioxide and water, calculate the mass of carbon dioxide formed in this reaction. 2C2H6 +7O2 > 4CO2 +6H2O
Answer:
The mass of carbon dioxide formed in the reaction is 23.47 grams.
Explanation:
The balanced reaction is:
2 C₂H₆ +7 O₂ ⇒ 4 CO₂ + 6 H₂O
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
C₂H₆: 2 moles O₂: 7 moles CO₂: 4 molesH₂O: 6 molesBeing the molar mass of the compounds:
C₂H₆: 30 g/moleO₂: 16 g/mole CO₂: 44 g/moleH₂O: 18 g/moleBy reaction stoichiometry, the following mass amounts of each compound participate in the reaction:
C₂H₆: 2 moles* 30 g/mole= 60 gO₂: 7 moles* 16 g/mole= 112 gCO₂: 4 moles* 44 g/mole= 176 gH₂O: 6 moles* 18 g/mole= 108 gThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: if by stoichiometry of the reaction 7 moles of O₂ react with 60 g of C₂H₆, 2 moles of O₂ will react with how much mass of C₂H₆?
[tex]mass of C_{2}H_{6} =\frac{2 moles of O_{2}* 60 grams of C_{2}H_{6} }{7 moles of O_{2}}[/tex]
mass of C₂H₆= 17.14 grams
But 17.14 grams of C₂H₆ are not available, 8 grams are available. Since you have less moles than you need to react with 2 moles of O₂, ethane C₂H₆ will be the limiting reagent.
Then, it is possible to determine the amount of mass of CO₂ produced by another rule of three: if by stoichiometry 60 grams of C₂H₆ produce 176 grams of CO₂, how many mass of CO₂ will be formed if 8 grams of C₂H₆ react?
[tex]mass of CO_{2} =\frac{8 grams of C_{2}H_{6}* 176 grams of CO_{2} }{60 grams of C_{2}H_{6}}[/tex]
mass of CO₂= 23.47 grams
The mass of carbon dioxide formed in the reaction is 23.47 grams.
What are two uses of sulfur?
Answer:
It's used in the vulcanisation of black rubber, as a fungicide and in black gunpowder and a production of sulfuric acid.
Explanation:
Please select the word from the list that best fits the definition.
Science lab, bring water and sodium
a) term calendar
b) weekly schedule
c) daily organizer
Answer:
C. Daily Organizer. Also called an agenda. We usually write notes in them for school related things so the answer is pretty self explanatory.
WHICH OF THE FOUR COMPOUNDS HAS BONDS WITH THE GREATEST DEGREE OF POLARITY (MOST POLAR)?
Answer:
I NEED TO KNOW THIS TOO
Explanation:
IVE BEEN LOOKING FOR THE ANSWER
Why does forming bonds release energy? *
Mole Conversions
What is the mass in grams of
0.625 mol Ba(NO3)2?(please show work)
Answer:
Explanation:
Using the formula as follows: mole = mass/molar mass
Molar mass of Ba(NO3)2
= 137 + (14 + 48)2
= 137 + 124
= 261g/mol
Mole = mass ÷ molar mass
0.625 mol = mass/261g/mol
mass = 0.625 × 261
mass = 163g
Which material has been recycled for over 3,000 years?
Answer:
plastic
Explanation:
5. __HCl + __NaOH-> __NaCl + __H2O
6. __FeS + __HCl-> __H2S + __FeCl2
7. __C2H4 + __O2-> __CO2 + __H2O
What are the balanced equations?
Answer:
5. balanced (1,1,1,1)(double replacement)
6. 1,2,1,1 (double replacement)
7. 1,3,2,2 (combustion)
Explanation:
please make me brailiest
Which statement describes a physical property to the particles that make up a material
Answer:
Gold is a relatively dense metal because its atoms have more
protons than atoms of many other metals.
Explanation:
what percent of the sun's energy is used by the living organism on earth
a. 1%
b. 10%
c. 20%
d. 35%
e. 50%
The temperature of a city during a week was 35° C, 36°C, 34°C, 38°C, 40°C, 39°C and 44°C. What was the average daily temperature of the town for the week?
Answer:38°
Explanation:
Which particle diagram represents a mixture?
( i hope you can read it)
The diagram of the mixture is the third diagram
Explanation:
A substance that only has one kind of atom is known as an element.The element cannot be broken down further into simple substances by any physical means.A substance that only has more than one kind of atom is known as a compound.The compound can be broken down further into simple substances by chemical means.The compound has a fixed proportion of atoms of different elements.A substance that only has more than one kind of element or compound is known as a mixture.The mixture can be separated by physical means.So, from this, we can conclude that from the given particle diagrams, the diagram of the mixture is the third diagram as it has one compound molecule and two atoms of a different element.
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Which kind of worm has a closed circulatory system?
a planarian
a fluke
a pinworm
an earthworm
An earthworm has a closed circulatory system.
The earthworm has a closed circulatory system. An earthworm circulates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm.
As important as they are alive for distributing nutrients and organisms and decomposing matter, worms are also very important in the food chain. They provide a crucial protein-rich source of food for other important species like birds, hedgehogs and frogs.
They may live up to eight years, though one to two is more likely. Full size for an earthworm varies among species, ranging from less than half an inch long to nearly 10 feet.
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Dinitrogen pentoxide is used in the preparation of explosives. If 7.93 mol of
dinitrogen pentoxide undergoes simple decomposition, what volume of Oz(9) is
produced at 48.0 °C and 125 kPa?
The volume of O₂ produced: 84.6 L
Further explanationGiven
7.93 mol of dinitrogen pentoxide
T = 48 + 273 = 321 K
P = 125 kPa = 1,23365 atm
Required
Volume of O₂
Solution
Decomposition reaction of dinitrogen pentoxide
2N₂O₅(g)→4NO₂(g)+O₂ (g)
From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :
= 0.5 x mol N₂O₅
= 0.5 x 7.93
= 3.965 moles
The volume of O₂ :
[tex]\tt V=\dfrac{nRT}{P}\\\\V=\dfrac{3.965\times 0.082\times 321}{1.23365}\\\\V=84.6~L[/tex]
my cat just said HELL should i be concerned.
( i am dead serious not hello just HELL)
Answer:
Oh my. Just make sure that your cat isn't possessed by a demon or something. You never know if it's satan watching your back
Answer:
Explanation:
^^Shoyo hinata here!!!!!
welll that’s scary…!!! ♡(.◜ω◝.)♡
Awwwwwe I love cats when they talk! have u wached anime near your cat????? Maybe it’s possessed!!?!?!?
Given a force of 100.00 N and an acceleration of 5 m/s2, what is the mass of the object?
Answer:
20 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{100}{5} = 20 \\ [/tex]
We have the final answer as
20 kgHope this helps you
Define Mole Concept give 3 Significance of Mole concept
Answer:
The mole is important because it allows chemist to work with a subatomic world with macro world units and amount. Atoms molecules and formula units are very small and very difficult to work with usually. However the mole allows a chemist to work with amount large enough to use.
In the International System of Units, the mole is the unit of substance quantity. How many elementary entities of a certain substance are present in an item or sample is determined by the quantity of that material.
Three significance of Mole concept are:
1) Since atoms and molecules are so tiny, we can count them using the mole idea by weighing extremely little quantities of material.
2) It sets a benchmark for figuring out the stoichiometry of reactions.
(3) It explains the characteristics of gases.
The mole is specified as exactly 6.02214076×10²³ elementary entities.
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mg(oh)2
How many H atoms are there?
How many Mg?
What is the total number of atoms?
What type of chemical reaction occurs when more energy is released during a chemical reaction than is needed to start a chemical reaction
Answer:
exothermic reaction
Explanation:
your welcome :)
What is chemical potential energy?
A. Energy stored by atoms
B. Energy of motion
C. Energy stored in height differences
D. Energy from gravity
Answer:
the answer is A.
i think:/
Explanation:
Convert 31.82 grams of ca(oh)2 to moles Convert 3.2 moles of k2so3 to grams Convert 7.25x10^23 formula units of hcl to moles Convert 46.6L of cl2 gas to moles at stp
Answer:
See explanation
Explanation:
Number of moles = given mass/molar mass
For Ca(OH)2
n= 31.82g/74g/mol= 0.43 moles
n = mass/ molar mass
Molar mass of K2SO3 = 158g/mol
mass= 3.2 × 158 = 505.6 g
1 formula unit = 6.02 × 10^23
1 mole = 6.02 × 10^23
x moles = 7.25x10^23
x = 7.25x10^23/6.02 × 10^23
x= 1.2 moles
1 mole of Cl2 occupies 22.4 L at STP
x moles of Cl2 occupies 46.6L
x = 46.6/22.4
x= 2.1 moles
What needs to be known about an object in order to determine its kinetic energy.
P.S Please help I need to answer this question for my pendulum experiment.
Answer:
we need to know it's
mass and velocity
Explanation:
then use the formula of kinetic energy
Answer:
Mass and velocity (or motion).
Explanation:
KE=(1/2)mv^2.
The kinetic energy of an object is the amount of work (expended energy) that's required to move (or more accurately, to accelerate) the object to a specific velocity. So, if you know the mass of the object, and you know it's current velocity, you can determine it's kinetic energy with the formula above.
How many moles are in 43 grams of lithium (LI)?
Answer:
6.19507275608684
Explanation:
3. Which of the following claims do NOT a limitation of Bohr's model? *
Electrons in an orbital have constant energy
Electrons can exist in between energy levels
Electrons must absorb a quantum to move up an energy level
Electrons behave like particles
Answer:
B. Electrons can exist in between energy levels .
Explanation:
The value of energy for each energy level in an atom is quantized. Thus, electrons are not allowed to be found in between the energy levels.
When an electron absorbs energy, it becomes excited. And it would jump to a higher energy level whose energy is equal to the new energy of the electron. If the value of its new energy is less than the energy of higher levels but greater than the energy of it current energy level, the electron remains in its initial level. This is because, electrons do not exist in between energy levels .
You use a battery to power a small hand-held fan to keep cool in the summer what way is the energy transformed?
Answer:
Chemical to electrical to kinetic energy
Explanation:
In a battery-operated fan, first, the chemical energy stored in the battery is converted to electrical energy within the fan and then the electrical energy, in turn, is converted to kinetic energy which makes the blades of the fan rotate. The rotation of the fan creates a breeze that forces the evaporation of sweat molecules from the surface of the skin and causes cooling in return.
Calculate the pH after 0.13 mol NaOH are added to 1.00 L of 0.50M HC2H3O2 and 0.80M NaC2H3O2 buffer solution, Ka= 1.3 x 10^-5. I really need help, I'm struggling with this topic.
Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green
hoped I helped
PLEASE HELP WITH #3 I WILL GIVE BRAINLEIST!
Answer:
i thunk venus may be right or wrong tel7
Answer:
saturn:85 minutes
venus: 4.25 minutes
Can you help me balance the following chemical equation?!
Al(OH)3 + H2CO3 = Al2(CO3)3 + H2O
Answer: [tex]2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3+6H_2O[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants.
The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical equation will be :
[tex]2Al(OH)_3+3H_2CO_3\rightarrow Al_2(CO_3)_3+6H_2O[/tex]
