Answer: The energy of the products exceeds the activation energy threshold.
Explanation:
In the reverse reaction, the reactants of the forward reaction are now the products of the reverse reaction and vice versa.
This means that normally since you would need the energy of the reactants of the forward reaction to exceed the activation energy threshold, in the reverse reaction, the energy of the products would need to exceed the activation energy threshold.
The magnet below is cut in half. What will be the result
the cut pieces will have their own north and south pole
Name one similarity and one difference between visible light and sound.
Answer:
Light and sound both are waves, but sound requires a material medium to travel, and hence cannot travel in empty space while light can travel through vacuum but not through opaque materials. Both undergo refraction, diffraction and interference.
Explanation:
Please help!
Given the equation representing a reaction
Which statement explains the energy term in this reaction?
Answer: 3. Mass is lost due to the conversion of mass to energy.
Heat that flows by conduction is the transfer of thermal energy between substances in contact. What must occur for this to happen? A. The two systems must be the same temperature.
B. The two systems must not be touching each another.
C. One system must have higher kinetic energy than the other system.
D. The thermal energy of one system must be the same as the thermal energy of the other system.
Answer:
c. one must have a higher kinetic energy than the other system
Given the unbalanced equation which represents aluminum metals reacting with an acid:
Al + H+ → Al+3 + H₂
What is the total number of moles of electrons lost by 1 mole of aluminium?
There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.
What is cation?When an atom loses electron, positive charge appears on the atom this is called cation. In this reaction we can see that aluminium has +3 charge which means that it loses 3 electrons.
So we can conclude that There are three number of electrons lost by 1 mole of aluminium because aluminum has +3 charge on it.
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The element __ is the most similar to oxygen in chemical and physical properties.
Answer:
the element air is the most similar to oxygen in chemical. and physical properties
what effect does a catalyst have on a reaccion rate an the products formed in a reaccion
chemistry can someone solve this?
eimetchuinsumuleavtubronAnswer:
Explanation:
what type of solution forms when 25g of NaCI are dissolved in 100g of water at 30 degrees c
An unsaturated solution is formed when 25g of NaCI are dissolved in 100g of water at 30 degrees Celsius.
What is an unsaturated solution?A solution is formed as a result of the dissolution of a solute in a solvent.
However, based on the capacity of the solvent to take in more solute, a solution can be of three types namely;
Unsaturated solutionSaturated solutionSupersaturated solutionAn unsaturated solution is a solution whose solvent can dissolve more solute at a particular temperature.
According to this question, 25g of NaCI are dissolved in 100g of water at 30°C, hence, the solvent can take in more solute at 30°C.
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Give the postional isomers of 2 halopropane
(CH3)2CH
Give the positional isomers of 2 halopropane
(CH3)2CH
answer:
is in file download it
0.58 mol of Mg contains how many atoms? please show work
The number of atoms present in 0.58 mole of magnesium, Mg is 3.49×10²³ atoms
Avogadro's hypothesis1 mole of Mg = 6.02×10²³ atoms
How to determine the atoms in 0.58 mole of Mg1 mole of Mg = 6.02×10²³ atoms
Therefore,
0.58 mole of Mg = 0.58 × 6.02×10²³
0.58 mole of Mg = 3.49×10²³ atoms
Thus, 3.49×10²³ atoms are present in 0.58 mole of Mg
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What reaction is 2KCLO3 2KCI + 3O2
Answer: Decomposition
Explanation:
of an investigation, students were asked to prepare a sodium hydroxide solution of a certain molarity. The students were given a
of procedures. Which procedure will result in 750 mL of 1.5 M NaOH solution?
issolving 1.13 g of NaOH in enough water to make up to 750 mL of solution
ssolving 45 g of NaOH in enough water to make up to 750 mL of solution
ssolving 40 g of NaOH in 1 L of water
solving 1.13 g of NaOH in 0.750 L of water
The correct procedure is:
Dissolving 45 g of NaOH in enough water to make up to 750 mL of solution
What is molarity?This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:
Molarity = mole / Volume
How to determine the mole of NaOH Volume = 750 mL = 750 / 1000 = 0.75 L Molarity = 1.5 MMole of NaOH =?Mole = Molarity x Volume
Mole of NaOH = 1.5 × 0.75
Mole of NaOH = 1.125 mole
How to determine the mass of NaOH Mole of NaOH = 1.125 moleMolar mass of NaOH = 40 g/mol Mass of NaOH =?Mass = mole × molar mass
Mass of NaOH = 1.125 × 40
Mass of NaOH = 45 g
Thus, to obtain 750 mL of 1.5 M NaOH solution, 45 g of NaOH will be dissolved in enough water to make up to 750 mL of solution
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a mole of pennies would fill up how many 32oz cups?
Answer:
4 cups?
Explanation:
All of the following reactions are described as decomposition reactions except
O CuSO4.5H₂O(s) CuSO4(s) + 5H₂O(g).
O 2PbO₂ (s)
2PbO(s) + O₂(g).
O Fe(CO)(I)
Fe(s) + 5CO(g).
O H₂SO3(aq)
SO₂(g) + H₂O(l).
O NO₂(g) + H₂O(l) 4 NO(g) + 2HNO3(aq).
The reaction NO₂(g) + H₂O(l) 4 NO(g) + 2HNO3(aq) is not a Decomposition Reaction , Option E is the correct answer.
What is a Decomposition Reaction ?A reaction in which a substance break down into two or more substances is called a Decomposition Reaction.
In the given question
the reactions
CuSO4.5H₂O(s)--> CuSO4(s) + 5H₂O(g).
2PbO₂ (s) --> 2PbO(s) + O₂(g).
Fe(CO)(I)-->Fe(s) + 5CO(g).
H₂SO3(aq)-- >SO₂(g) + H₂O(l)
These are all Decomposition Reaction.
The only reaction which is not is the Reaction E
NO₂(g) + H₂O(l) 4 NO(g) + 2HNO3(aq)
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okay so if i fail the first time do i repeat the class? or can my teacher still pass me even if i pass the class but fail the test?
Answer:
It depends on what type of test your speaking of, is it a state exam?
If you are passing a class and fail a test you will still pass. If you fail a class you do not need to take it again if you don't want to but you would have to take another class instead.
In the following acid-base reaction
H₂O is the _
HCI(g) + H₂O(l) →H3O*(aq) + Cl-(aq)

Answer: base
Explanation:
The water accepted another hydrogen ion, making it a base.
In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.
What is an acid- base reaction ?An acid-base reaction is a chemical reaction in which an acid reacts with a base to form a salt and water. In such a reaction, the acid donates a proton (hydrogen ion) to the base, which accepts the proton. The transfer of a proton from the acid to the base leads to the formation of the conjugate base of the acid and the conjugate acid of the base.
In general, an acid is a substance that donates a proton (H+) and a base is a substance that accepts a proton. When an acid and a base react, the resulting products are a conjugate acid-base pair, where the acid is the product that has gained a proton and the base is the product that has lost a proton.
In the given acid-base reaction, H₂O (water) is the base because it accepts a proton (H+) from the hydrogen chloride (HCl) molecule and forms hydronium ion (H₃O+) by gaining an extra proton.
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How many grams are there in 9.6 x 1025 molecules of H2? Round your final answer to two decimal places.
Answer:
there are 310.64 grams in 9.40×10²⁵ molecules of H₂.
Explanation:
Amount of moles of H₂= (9.6 × 10²⁵ atoms × 1 mole) ÷ 6.023 × 10²³ atoms
amount of moles of H₂ = 155.32 moles
On the other hand, molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of H₂ is 2 .
Then the mass that 155.32 mole of compound contains is calculated as:
155.32 moles × 2 = 310.64 grams
Finally, there are 310.64 grams in 9.40×10²⁵ molecules of H₂.
Moles of H_2
[tex]\\ \rm\Rrightarrow \dfrac{No\:of\: molecules}{Avagadro\:no}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{9.6\times 10^{25}}{6.023\times 10^{23}}[/tex]
[tex]\\ \rm\Rrightarrow 1.594\times 10^{2}[/tex]
[tex]\\ \rm\Rrightarrow 159.39mol[/tex]
Mass
[tex]\\ \rm\Rrightarrow Moles\times molar\:mass[/tex]
[tex]\\ \rm\Rrightarrow 159.39(2)[/tex]
[tex]\\ \rm\Rrightarrow 318.78g[/tex]
How many moles of aluminum oxide (Al2O3) are produced by reacting 5 moles of iron oxide (FeO)?
2AI+ 3FeO --> 3Fe + 1Al₂O3
Answer:
1.67 moles Al₂O₃
Explanation:
To find the amount of aluminum oxide produced, you need to start with 5 moles FeO and multiply it by the mole-to-mole ratio displaying the relationship between moles FeO and moles Al₂O₃. This ratio incorporates the coefficients from the equation. Remember, make sure to write the ratio in a way that allows for the cancellation of moles FeO.
2 Al + 3 FeO ---> 3 Fe + 1 Al₂O₃
5 moles FeO 1 mole Al₂O₃
-------------------- x ---------------------- = 1.67 moles Al₂O₃
3 moles FeO
An atom of an element is shown by the model.
How is the model useful
Answer:
I believe it is useful as it shows how electrons are distributed in the shells (energy levels) of an iron atom. An atom is the smallest particle of an element that can take part in a chemical reaction. It contains the nucleus and the shells (energy levels). the nucleus contains protons and neutrons while the shells contain electrons.
Explanation:
What is the mass of a cube that has a density of 45g/ml and a volume of 15 ml?
Answer:
675g
Explanation:
The equation that relates mass, density and volume is:
Density = mass ÷ volume
By rearranging the equation we can find the mass of the cube.
Mass = density × volume
Mass = 45 × 15
∴ Mass = 675 grams
Determine the mass of hydrogen gas collected in a container if the gas occupies
44.8 L at STP.
Answer:
Hope this helps kinda got confused mid way
Explanation:
So the hydrogen sulphide is H2S for the molecular formula. Then the mass of hydrogen sulphide would be 1×2+32= 34g/mol At STP.
does hot ice have to be cold or hot?
Answer:
hot
Explanation:
You'll need to boil the solution, though, to reduce the amount of water so that it is concentrated enough to form crystals. Cook your solution over low to medium heat for about an hour. You want to reduce it down to 1 cup or less.
b. The sedative Demerol hydrochloride has the formula
C15H22CINO2. How many grams are in 0.025 mole of
Demerol hydrochloride?
Dinitrogen oxide (or nitrous oxide), N₂O, also known as
laughing gas, is widely used as an anesthetic in dentistry.
The number of grams present in 0.025 mole of Demerol hydrochloride is 7.094 grams.
What is Demerol hydrochloride?It is a drug used in treating severe or moderate pain.
The moles are given = 0.025
The formula is C₁₅H₂₂CINO₂
The elements that present are C, H, Cl, N, O.
The molecular weight are given:
Carbon: 12.0107
Hydrogen: 1.00784
Chlorine: 35.453
Nitrogen: 14.007
Oxygen: 15.999
Multiply the molecular weight with moles and add them
(15 x 12.0107) + (22 x 1.00784) + (1 x 35.453) + (1 x 14.007) + (2 x 15.999) = 283.79098 grams per mole.
Now, multiply the number of moles given with the total molecular weight
283.79098 x 0.025 = 7.094
Thus, the number of grams are 7.094.
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When water, oxygen, and iron
combine, what is produced?
A. rust
B. carbon
C. carbon dioxide
D. carbon monoxide
Answer:
When we combine oxygen, and iron rust is produce.
Explanation:
The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.
Why we use cotton cloth to mop the floor?
Answer:
because cotton have a good absorbing quality and can absorb water more which is used to mop the floor
Explanation:
The mass of ethylene glycol (molar mass 62.1 g / mol), the main component of the antifreeze, must be added to 10.0 L of water to obtain a solidified solution at -23 ° C. Assume a water density of 1 g / mL.
What is the density of helium at 0.975 atm and 27.0 C?
Answer:
0.158g/L.
Explanation:
MM of helium gas or He =4 g/mol
P = 0.974 atm
T = 27 °C, but we need absolute temperature.
TK = TC + 273
T = 27 + 273 = 300 K
m/V = (4 g/mol · 0.975 atm) / (0.0821 L·atm/mol·K · 300 K)
m/V = 0.975/6.1575 g/L
m/V = 0.158g/L
Answer: The density of the helium is 0.158g/L.
Which of the following items represents a chemical change?
melting
evaporation
freezing
burning
You have now identified whether crabs are able to see plankton they eat near the ocean floor. Based on your answer, explain how this information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor (what other organisms live at the bottom? How are these able to see their food/ attract food to survive?
They are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.
How this information can be used to help to understand the environment of the ocean floor?This information can be used to help the Australian Institute of Marine Biology further to understand the environment of the ocean floor because they are able to see the seas floor and can find out other creatures as well.
So we can conclude that they are able to find out more organisms which are present at the bottom of the sea due to their accomplishment.
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