Answer:
The reactants for rust are iron ,water and oxygen while the products are hydrated iron oxide
Explanation:
4Fe+3O2+2H2O---->2Fe2O3.H2O
Isobutane (C4H10) is one of the components of natural gas. Which equation
shows the balanced combustion reaction for isobutane?
A. C4H10 + O2 + 4CO2 + H2O + heat
B. C4H10 + O2 + CO2 + H2O + heat
C. C4H10 + O2 + 4C02 + 5H20 + heat
D. C4H10 +6.502 → 4002 + 5H20 + heat
SUBMIT
Answer:
D. C₄H₁₀ + 6.5O₂ → 4CO₂ + 5H₂O + heat
Explanation:
The reaction of the combustion of isobutane with oxygen is presented as follows;
C₄H₁₀ + 6.5O₂ → 4CO₂ + 5H₂O + heat
In the above reaction, the number of elements on the reactant side are;
4 carbon, C, atoms, 10 hydrogen, H, atoms, and 13 oxygen, O, atoms
The number of elements on the product side of the above chemical reaction are;
The number of carbon atoms, C = 4
The number of hydrogen atoms, H = 10
The number of oxygen atoms, O = 13
Therefore, the number of atoms on the reactant side of the chemical equation are equal to the number of atoms on the product side, and the combustion reaction for isobutane is balanced.
A 240g hydrated sodium sulphide contains 162g of water of crystallisation. What is the correct molecular formula for this compound?
What is the answer and working
Answer:
Explanation:
First of all, 1 mol of Sodium Sulphide has molecular mass of
S = 32
Na2 = 2*23 = 46
The formula of NaS is actually Na2S. It's molecular mass = 78
How many grams of Na2S are present
Grams present = 240 - 162 = 78 which is exactly 1 mol.
The remainder is water.
The molecular mass of water = 2 + 16 = 18
162 grams of water = 162/18 = 9 mols of water.
So the correct formula is Na2S*9H20
which best describes nuclear energy?
A the energy that matter has due to the vibrations of its particles
B the energy an object has due to its chemical bonds
C the energy generated by a flow of electrons
D the energy stored inside the center of an atom
Answer:
The correct answer is - D. the energy stored inside the center of an atom.
Explanation:
Each atom has a small center in it called the nucleus and the energy that holds the nucleus or center of the atom together in the atom is known as nuclear energy.
It is the energy that is stored in the center of the atom and normally does not come out, however, in some radioactive atoms the sends some part of the energy as radiation.
Thus, the correct answer is - D. the energy stored inside the center of an atom.
Which of the following elements will most likely not form an ion at all?
Br
Na
O
Ar
Mg
Answer:
О
because it has the fewest number of electrons
Unknown # 29
Flame Test Color: Green
Addition of HCl(aq): Bubbles
Addition of HCl(aq) and BaCl2(aq): NR (No Reaction)
Addition of HNO3(aq) and AgNO3(aq): White precipitate
What is the unknown ionic compound molecular formula?
Answer:
I think it's a sulphate ion, because when you add hydrochloric acid to it it produces bubbles and when you add barium chloride it then produces a white precipitate.its formula is SO4
I hope this helps
tính chất hoá học của Cu
Answer:
các oxit đồng khi nó tiếp xúc với không khí. nó phản ứng đặc biệt với oxy trong không khí (không phải hơi ẩm), và tạo ra nấm mốc
Answer:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Explanation:
i dont know 8th and i am not sure baout carbonic acid in 10 th but they are balanced
Precipitate WILL form if Silver Nitrate reacts with Iron (III) chloride
-true or false
Answer:
yes
Explanation:
3Ag(No3) (aq) +FeCl3(aq) -->Fe(NO3)3(aq)+3AgCl(s)
difference Between phenol and dettol
How is kilo gram is related to gram
Answer:
i know you think that they are just related because kg has kilo but they are related because
Explanation:
1000g makes 1 g.You see how much there is a difference in the solution because how is one=one thousand,well that is all i can help you from here.bye panta
Answer:
1 g=1000kg
Explanation:
They are related in mathematical way
Name the property of salt investigated in the above experiment
which experiment please involve a clip
We have two surfaces A and B where same amount of Force is acting. Area of Surface A is greater than Area of Surface B. which of the following will be true *
1 point
Pressure on Surface A > Pressure on Surface B
Pressure on Surface B > Pressure on Surface A
Pressure does not depend on area
Pressure on Surface A= Pressure on Surface B
Answer:
Pressure on Surface A > Pressure on Surface B
Explanation:
Pressu
re on Surface B > Pressure on Surface A
what quantities will you need to measure to determine the specific heat of one of these liquids? (pivot)
Answer:
Specific heat capacity is measured by determining how much heat energy is needed to raise one gram of a substance one degree Celsius. The specific heat capacity of water is 4.2 joules per gram per degree Celsius or 1 calorie per gram per degree Celsius
Explanation:
Aluminum reacts with a certain nonmetallic element to form a compound with the general formula AlX. Element X is a diatomic gas at room temperature. Element X must be __________. Group of answer choices oxygen fluorine chlorine nitrogen sulfur
Answer:
It's nitrogen
Explanation:
cuz it has valence 3 and a diatomic gas at room temperature
Element X must be nitrogen.
Chemical reactionThe general formula AlX indicates that aluminum (Al) is reacting with a nonmetallic element represented by X to form a compound.
Since the compound AlX is said to be a diatomic gas at room temperature, it aligns with nitrogen (N2), which is a diatomic gas and a nonmetal.
Among the given options, nitrogen is the diatomic gas that best fits this description.
More on nitrogen can be found here: https://brainly.com/question/16711904
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By which process aqua fortis is manufactured
1) Haber's process
2) Ostwald process
3) Contact process
4) Deacon's process
Answer: Aqua fortis is also known as Nitric Acid
Explanation: and the process in making aqua fortis is THE OSTWALDS PROCESS
detailed explanation by me
ammonia is also used in this process, which is reacted with oxygen and water and a catalyst platinum.
HOPE THIS HELPSS!!!
What is Halo form reaction?
Answer:
Explanation:
I willl go into a bit of detail on the haloform reaction. So the first few steps involve forming an enolate using the base, typically NaOH. THe enolate and go on to do alpha halogenation 3 times. After that, is leaves a trisubstituted alpha methyl carbon with a specific halogen. This is a good leaving group in itself and can carbonyl nucleophillic substitution and turn into a carboxylic acid with a CHZ3- byproduct where Z represents a halogen.
A student was given a 2.850-g sample of a mixture of potassium nitrate and potassium bromide and was asked to find the percentage of each compound in the mixture. She dissolved the sample and added a solution that contained an excess of silver nitrate, AgNO3. The silver ion precipitated all of the bromide ion in the mixture as AgBr. It was filtered, dried, and weighed. Its mass was 1.740 g. What was the percentage of each compound in the mixture
Answer:
See explanation
Explanation:
The reaction occurs as follows;
KBr(aq) + AgNO3(aq) ----> AgBr(s) + KNO3(aq)
Number of moles of AgBr formed = mass /molar mass =1.740 g/187.77 g/mol = 0.0093 moles
From the reaction equation;
1 mole of KBr yields 1 mole of AgBr
Hence the number of moles of KBr reacted = 0.0093 moles
Mass of KBr present = 0.0093 moles × 119g/mol = 1.11 g
Mass of KNO3 = 2.850 g - 1.11 g = 1.74 g
Percentage of KBr = 1.11 g/2.850 g × 100 = 38.9%
Percentage of KNO3 = 1.74 g/2.850 g × 100 = 61.1%
A car of 1200 kg is moving with a speed of 36 Km/hr. It is stopped by applying brakes withion with in 5 seconds. Calculate the amount of force required to stop the car.
Answer:
–2400 N
Explanation:
This is a physics question. However, the answer to the question is given below.
We'll begin by converting 36 Km/hr to m/s. This can be obtained as follow:
3.6 Km/hr = 1 m/s
Therefore,
36 Km/hr = 36 Km/hr × 1 m/s / 3.6 km/hr
36 Km/hr = 10 m/s
Thus, 36 Km/hr is equivalent 10 m/s.
Next, we shall determine the acceleration of the car. This can be obtained as follow:
Initial velocity (u) = 10 m/s
Final velocity (v) = 0 m/s
Time (t) = 5 s
Acceleration (a) =?
a = (v – u) / t
a = (0 – 10) / 5
a = – 10 / 5
a = –2 m/s²
Finally, we shall determine the force required to stop the car. This can be obtained as follow:
Mass (m) = 1200 Kg
Acceleration (a) = –2 m/s²
Force (F) =?
F = ma
F = 1200 × –2
F = –2400 N
NOTE: The negative sign indicate that the force is in opposite direction to the motion of the car.
describe the process to electroplating with the help of an activity
Answer:
process of depositing a thin layer of any superior metal over an object of a cheaper metal, with the help of electric current
Explanation:
I hope this help have an great day and stay health
Một hỗn hợp A gồm nahco3, na2co3, k2co3 có khối lượng 46,6 g chia A làm 2 phần bằng nhau Phần 1: tác dụng với dung dịch CaCl2 dư thu được 15 gam kết tủa Phần 2 :tác dụng với dung dịch ca(oh)2 ư thu được 20 gam kết tủa Tính khối lượng mỗi muối trong hỗn hợp A
Answer:
anA IL
Explanation:
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how is soda made?
this includes sprite, coca cola, dr pepper, exd.
Answer:
Soda all start with watered down corn syrup. To get the carbonation companies have different ways of doing this all of which are very different. The last step is to add artificial and natural flavors like lemon and lime, this is also the step in which sugar and preservatives are added.
Explanation:
I hope this answer your question, srry I couldn't go into detail.
Which would increase the reaction rate?
O A. Decreasing the reactant concentrations
B. Removing heat from the system
O C. Adding a catalyst
O D. Lowering the value of k
Answer:
C
Explanation:
C. Adding a catalyst would increase the reaction rate.
What is a catalyst?A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy required for the reaction to occur.
A catalyst enhances the probability of successful collisions between reactant molecules, which raises the pace of the reaction by offering an additional avenue for the reaction to occur.
As there would be fewer reactant molecules accessible to react with one another, decreasing reactant concentrations would result in a slower pace of reaction.
Due to the fact that chemical reactions often require energy to take place, eliminating heat from the system would also slow down the reaction rate. A lower value for k would result in a lower rate constant, which would lower the response rate.
Learn more about catalyst at:
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In an exothermic reaction, heat is
released into the surroundings. How does this affect entropy?
particles in the surroundings move slower and have decreased entropy.
• B. The particles in the surroundings move faster and have increased entropy.
•C. The particles in the surroundings move
surroundings move slower and have increased entropy.
• D. The entropy is not affected by this.
Answer:
B. the particles in the surroundings move faster and have increased entropy
Explanation:
An exothermic process releases heat, causing the temperatures of the surroundings to increase. Entropy increases as temperature increases. Since an exothermic reaction releases heat to the surroundings, molecules in the surroundings will begin to move faster because they will absorb more energy, which increases their kinetic energy. An increase in temperatures means that the particles of the surroundings have greater kinetic energy. The faster moving particals have more disorder than particles that are moving more slowly at a lower temperature. Entropy is interpreted as the degree of disorder/randomness.
At the beginning of the reaction: N2 + 3H2 -> 2NH there is 1 mol of N. and 3 moles of H, and at the end of it is present a mixture formed by 2.5 moles in total, what is the performance for the reaction?
5.- Al comenzar la reacción: N2+ 3H2 -> 2NH existe 1 mol de N. y 3 moles de H, y al finalizarla está presente una mezcla formada por 2,5 moles en total, ¿cuál es el rendimiento para la reacción?
Answer:
75%
Explanation:
call realistic moles of N2 in the reaction is a
moles of H2 :3a
moles of NH3: 2a
the moles of residual N2 after reaction: 1-a
the moles of residual H2 after react: 3- 3a
the moles of mixture: 2a+1-a+3-3a=2.5
-> a=0.75
H=0.75/1=75%
Câu 9: 100 g dung dịch MgCl2 9.5 % tác dụng đủ với dung dịch KOH 5,6 % .được dung dịch A và chất rắn B. Lọc rắn B và nung đến khối lượng không đổi được chất C.
a) Viết pt .Tính khối lượng răn C
b) Tính nồng độ phân trăm của dung dịch A.
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I pls help me this is the question:
define the following terms below
Answer:
natural resources: materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
renewable resources: a natural resource that is unlimited or that is naturally replenished rather quickly, such as sunlight or water
non renewable resources: (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption.
ASAP
What happens to a glass of pure fruit juice when water is added to it?
A - The number of moles of fruit juice increases.
B - The number of moles of fruit juice decreases.
C - The molarity of the juice increases.
D - The molarity of the juice decreases.
D. The MOLARITY of the juice DECREASES when water is added to it.
MOLARITY refers to the amount of a substance (solute) in a certain volume of solution. It is a measure of the CONCENTRATION OF A SOLUTION. In chemistry, molarity is calculated by dividing the number of moles of a solute by the volume of the solvent i.e.
MOLARITY (mol/L or M) = number of moles (n)/volume of solvent (V)
* The above equation means that the molarity of a solution is inversely proportional to its volume i.e. as molarity increases, volume decreases and vice versa.
According to this question, water is added to a glass of pure fruit juice (dilution). This means that the volume of the juice will increase. As the volume increases via addition of water, the MOLARITY DECREASES.
Learn more: https://brainly.com/question/20899596
pentanitrogen heptachloride formula
Answer:
Explanation:
this is the answer hope it helps!(:
The chemical formula of pentanitrogen heptachloride is N₅Cl₇ as it has 5 nitrogen atoms and 7 chlorine atoms.
What is chemical formula?
Chemical formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols of elements. It also makes use of brackets and subscripts.
Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form is called empirical formula.
It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.
There are four types of chemical formula:
1)empirical formula
2) structural formula
3)condensed formula
4)molecular formula
Learn more about chemical formula,here:
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True or false, The universal gas constant, R, is . 0821 when we use mm Hg as our unit for pressure
Answer:
This is true.
Explanation:
R should be 0.0821
Good luck!
The process during which cells of the body harness energy from food consumed by a living organism is ______________________.
