Answer: Galvanising is a method of rust prevention. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water from reaching the metal underneath - but the zinc also acts as a sacrificial metal . Zinc is more reactive than iron, so it oxidises in preference to the iron object.
Explanation:
36. Write a balanced chemical equation for each chemical reaction. (a) Solid copper reacts with solid sulfur to form solid copper(I) sulfide. (b) Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas. (c) Aqueous hydrochloric acid reacts with solid manganese(IV) oxide to form aqueous manganese(II) chloride, liquid water, and chlorine gas. (d) Liquid benzene (C6H6) reacts with gaseous oxygen to form carbon dioxide and liquid water.
Answer:
a) 2Cu(s) + S(s) → Cu₂S(s)
b) 2SO₂(g) + O₂(g) → 2SO₃(g)
c) 4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)
d) C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)
Explanation:
First, we have to write the chemical formulas for reactants and products. Then, to identify which is the state of matter of each compound (liquid: l, solid: s, aqueous: aq, gas: g). Finally, we write the equation and balance the atoms.
a) Solid copper reacts with solid sulfur to form solid copper(I) sulfide.
Reactants: solid copper (Cu(s)) and solid sulfur (S(s)). Product: copper(I) sulfide (Cu₂S) because sulfur anion has two negative charges (S⁻²) and we need two copper ions with one positive charge (Cu⁺) to obtain the neutral compound.
The balanced requires a coefficient of 2 for Cu(s) to balance the 2 Cu atoms on the products side:
2Cu(s) + S(s) → Cu₂S(s)
(b) Sulfur dioxide gas reacts with oxygen gas to form sulfur trioxide gas.
Reactants: sulfur dioxide (SO₂) and oxygen gas (which is a diatomic molecule: O₂). Products: sulfur trioxide gas (SO₃(s)).
The balanced equation is:
2SO₂(g) + O₂(g) → 2SO₃(g)
We need a coefficient of 2 for SO₂ and SO₃ to balance O and S atoms.
(c) Aqueous hydrochloric acid reacts with solid manganese(IV) oxide to form aqueous manganese(II) chloride, liquid water, and chlorine gas.
Reactants: aqueous hydrochloric acid (HCl(aq)) and solid manganese (IV) oxide (MnO₂(s), because we need two oxygen anions O²⁻ to neutralize 4 positive charges in Mn IV). Products: aqueous manganese(II) chloride (MnCl₂, because we need two chloride ions Cl⁻ to neutralize two positive charges in Mn(II)), liquid water (H₂O), and chlorine gas (Cl₂, because it is a diatomic molecule).
The balanced chemical equation is:
4HCl(aq) + MnO₂(s) → MnCl₂(aq) + 2H₂O(l) + Cl₂(g)
(d) Liquid benzene (C₆H₆) reacts with gaseous oxygen to form carbon dioxide and liquid water.
Reactants: benzene (C₆H₆) and gaseous oxygen (O₂). Products: carbon dioxide (CO₂, because C has valence IV) and liquid water (H₂O).
The balanced chemical equation is:
C₆H₆(l) + 15/2 O₂(g) → 6CO₂(g) + 3H₂O(l)
In this case, we need a coefficient of 15/2 for O₂ because on the product side there are 15 atoms of O (12 in CO₂ and 3 in H₂O).
Question - Complete and balance the following chemical equations:
C8H18 + O2 --->
When you complete and balance the specific equation, give the following information:
State which type of chemical reaction this is.
Explain how you know which type of chemical reaction it is.
List the amount of each element you have when the equation is unbalanced. E.g. there is one mole of calcium on the reactants side.
Give the balanced chemical equation.
List the amount of each element you have when the equation is balanced.
The order of the elements that you balanced the equation with.
Explain how you know which coefficient to use for the specific compound.
Your Answer:
Answer:
2C8H18 + 25O2 -> 16CO2 + 18H2O
(16C, 36H, 50O)
H2O requires 2H per H2O, Meaning that you'd have 9H2O's from 1C8H18, but you still need that O2 for the CO2 and because the reactant side has 8C (within C8H18) You'd have to times the amount of required O2 from CO2 by 8. Even then you still don't have enough for both CO2 and H2O so you'll have to multiply MORE causing a bigger chain reaction resulting in 2C8H18 + 25O2 -> 16CO2 + 18H2O
How much heat is released if you produced 1.24 mol of Oz?
Chemistry question balance equations
Answer:
I don't understand this question
Propose a mechanism and predict the products for the solvolysis of 2-bromo-2,3,3-trimethylbutane in methanol.
Answer:
See explanation and image attached.
Explanation:
Solvolysis is a reaction in which the solvent is also the nucleophile. The reaction occurs by SN1 mechanism since it yields most stable carbocation. The SN1 mechanism predominates since a weak nucleophile/base is used.
The major product as shown is the image attached to this answer. The first step is the loss of the bromide ion followed by nucleophillic attack of the solvent. Loss of H^+ completes the mechanism.
1 interpret geochemistry in your words. 2. how can you explain that the solar system (sun, all planets and satellites) has all been formed from a special nebula ?
Explanation:
(I only know this thing vaguely lol)
1.) It's the study of the chemistry that is happening here on earth that is not bounded by a laboratory.
2.) The early gas clouds compressed and formed a star we now call the sun and the massive gravitational pull of this star grabbed nearby debris and the debris formed and compressed into the planets and moons that we know today.
Graphite is one of the allotropes of carbon
a) Define the term allotropy
b) Identify the other allotrope of carbon
c) State two uses of graphite
Answer:
When an element exists in more than one crystalline form, those forms are called allotropes; the two most common allotropes of carbon are diamond and graphite. Every carbon atom is covalently bonded at the four corners of the tetrahedron to four other carbon atoms.
How many liters is 3.3 moles of a gas?
Answer:
224.1
Explanation:
Show the work. Convert 150 mm Hg to psi.
pls help me, thanks
Answer:
2.9 psi
Explanation:
Pressure (mmHg) = 150 mmHg
Pressure (psi) =?
The pressure in pound per square inch (psi) can be obtained as follow:
51.715 mmHg = 1 psi
Therefore,
150 mmHg = 150 mmHg × 1 psi / 51.715 mmHg
150 mmHg = 2.9 psi
Thus, pressure in pound per square inch (psi) is 2.9 psi.
Which of the following is a homogenous mixture?
A. chicken noodle soup
B. Kool-Aid
C. water
Answer:
Kool- aid
Explanation:
because it is the same throughout and can be seperated
Answer:
C. water
Explanation:
observation made when lead oxide passes through hydrogen gas
Answer:
a gray substance and colourless liquid
Explanation:
lead oxide is reduced to lead while hydrogen is oxidized to water
Can you help with question 8
Answer:
pH = 9.4
Explanation:
With the given molarity of OH⁻ species we can calculate the pOH of the solution:
pOH = -log[OH⁻]
pOH = 2.6
Now we can use the pOH to calculate the pH of the solution, with the following formula:
pH = 14 - pOH
pH = 14 - 2.6
pH = 9.4
So a solution containing a OH⁻ concentration of 0.0025 M has a pH of 9.4.
Can you all go vote for Dacia Campbell for Brainly Educator of The Year!!!!!
It would mean a ton!!! Plus, I'll give your profile a big THANK YOU...I'll give Brainliest and you get 50 points! Please, please, please. Go vote for her!
Answer:
i voted her!!!!
Explanation:
Please help !!! (no links or ill report)
there is a large range of rock ages in the ocean floor due to seafloor spreading, where are the youngest rocks found?
A ) Underneath the continental plate.
B ) Far from the plate boundary/ridge
C ) On the plate boundary/ridge
D ) In the subducton zone
if a lake has excess levels of phosphates and nirates in its water what will most likely result ?
Answer:
Eutrophication
Explanation:
Eutrophication results when there is excess levels of phosphates and nitrates in its water of lake.
When there is high level of nutrition level in the water body of lake, then the productivity of water plants increases thereby leading to algal boom and hence Eutrophication.
How many moles of BaS would be used to make 1200 mL of a 10.OM solution?
Look at the diagram. Which shows the correct arrangement of electrons in water?
Answer:
Option 4
Explanation:
In water molecule, oxygen has -2 charge on it while the hydrogen has +1 charge and one atom of oxygen combines with two hydrogen atoms. A hydrogen need only two electrons to complete its octet (one electron is its own the second electron is shared by oxygen) and a oxygen needs 8 electrons (It has six of its own and two are shared by two hydrogen atom).
Hence, option 4 is correct
Answer:
Option 2
It's more balanced than the others
Last time I'm asking this, answer, this time, 50 points.
Think about a single cell and its parts; for example, think about a cell inside the human body. Now, select an everyday object that could be used as a model for a cell and its parts. In words and/or pictures, describe your model and how it is like the cell.
Explanation:
Well i mean clothes so cells make tissues which help organs clothes can technically help you if you fall it has layers so it woulf be as a cell?
help asap please, What does Newton's law of gravitation state that two masses will do?
always fall
not have any affect on each other
attract each other
repel each other
Answer:
According to Newton's law of gravitation two objects attract each other
Answer: C. Attract each other!
Explanation:
12. Which organelle is found in plant and animal cells and is involved in making cellular energy from
respiration?
Answer:
The mitochondria is the organelle found in plant and animal cells and is involved in making cellular energy from respiration.
Explanation:
In the western U.S., ranchers aggressively killed wolves because they posed a threat to their cattle. As the wolf population declined, the deer population began increasing. As a result, the surrounding forest ecosystems experienced increasing damage. The large number of deer ravaged vegetation and destroyed young trees. The entire ecosystem became degraded until wolves became protected when they were determined to be an endangered species. Based on this information, what can you infer about the role of the wolves in this ecosystem? Please make it 3-5 sentences. Thank you so much
Answer:
Explanation:
You can make a couple of statements.
The wolves are preditors. They eat meat.The wolves hunt only 1 kind of food. They are not interested in young trees or grass (well not much anyway). If one species is allowed to get out of control, the entire ecosystem suffers because of it.This last statement only becomes true if man allows the hunted species that controlled the deer to regain good numbers. Man can be a blockhead sometimes; he learns slowly at times.Answer:
The wolves role in the ecosystem is to hunt/eat deer. In the question it states, "...ranchers aggressively killed wolves because they posed a threat to their cattle. As the wolf population declined, the deer population began increasing." It's clearly cause and affect, the wolves use to eat a lot of deer, then a large percentage of wolves died by the ranchers. The wolves role in the ecosystem is to hunt deer and help balance out animal to vegetation ratio.
Explanation:
Because i'm awesome lol
(Give me good ratings pleaseeeee.
A student placed a small piece of magnesium ribbon in a conical flask and added
60 mL hydrochloric acid. The student observed that when the hydrochloric acid
came into contact with the magnesium ribbon, bubbles formed indicating the
release of hydrogen gas. The magnesium dissolved and magnesium chloride
solution formed. Based on the student's observations, which type of reaction
occurred?
Answer:
Single replacement reaction
Explanation:
Let us try to write down the reaction equation for the reaction of a magnesium ribbon with hydrochloric acid.
Mg(s) + 2HCl(aq) ------> MgCl2(aq) + H2(g)
A single replacement reaction is a type of chemical reaction in which one element is replaced by another element in a compound.
In this reaction, magnesium replaced hydrogen to form the product. Hence it is a single replacement reaction.
i need help can someone help me
Answer:
Option D. The number of oxygen atom is the same before and after the reaction.
Explanation:
From the question given above, the following were obtained:
Robin's equation:
H₂ + O₂ —> H₂O
Alex's equation
2H₂ + O₂ —> 2H₂O
To know which equation better represents the reaction, we shall determine which of the equation is balanced.
For Robin:
H₂ + O₂ —> H₂O
Element >>> Reactant >>> Product
H >>>>>>>>> 2 >>>>>>>>>> 2
O >>>>>>>>> 2 >>>>>>>>>> 1
Robin's equation is not balanced because the number of atoms of each element in the reactant and product are not equal.
For Alex:
2H₂ + O₂ —> 2H₂O
Element >>> Reactant >>> Product
H >>>>>>>>> 4 >>>>>>>>>> 4
O >>>>>>>>> 2 >>>>>>>>>> 2
Alex' equation is balanced because the number of atoms of each element in the reactant and product are equal.
Thus, option D gives the right answer to the question.
5.Name the compound below
Answer:
There isn't anything below, but i can help if you edit the question and put it there
Explanation:
~Bre
A 15.0 mL solution of Sr(OH)₂ is neutralized with 21.1 mL of 0.350 M HCl. What is the concentration of the original Sr(OH)₂ solution?
Answer:
0.246 M
Explanation:
The reaction that takes place is:
Sr(OH)₂ + 2HCl → SrCl₂ + 2H₂OFirst we calculate how many HCl moles reacted, using the given volume and concentration:
0.350 M * 21.1 mL = 7.385 mmol HClThen we convert HCl moles into Sr(OH)₂ moles, using the stoichiometric coefficients of the balanced reaction:
7.385 mmol HCl * [tex]\frac{1mmolSr(OH)_2}{2mmolHCl}[/tex] = 3.692 mmol Sr(OH)₂Finally we calculate the concentration of the original Sr(OH)₂ solution:
3.692 mmol Sr(OH)₂ / 15.0 mL = 0.246 MA wavelength is traveling at 6,420m/s and has a frequency of 600Hz. What is the wavelength
Use mass-mass calculation, determine how many grams of sodium chloride SHOULD have been produced from the amount of sodium bicarbonate in mass (B.)
Answer:
where is the question???
How do you balance 3CaCl2+3Na(PO4)=Ca3(PO4)2+6NaCl
Answer:
[tex]3CaCl_2+2Na_3PO_4\rightarrow Ca_3(PO_4)_2+6NaCl[/tex]
Explanation:
Hey there!
In this case, according to the law of conservation of mass, it possible to balance the following reaction:
[tex]CaCl_2+Na_3PO_4\rightarrow Ca_3(PO_4)_2+NaCl[/tex]
By adding a 3 on CaCl2, a 2 on Na3PO4 and a 6 on NaCl in order to equal the atoms of calcium, chlorine, sodium, phosphorous and oxygen, as follows:
[tex]3CaCl_2+2Na_3PO_4\rightarrow Ca_3(PO_4)_2+6NaCl[/tex]
Best regards!
How is neutrophilia defined?
What is the name of the planet next to the label A?
Solar System
EARTH
SUN
A. Uranus
O ОО
B. Neptune
C. Jupiter
d
D. Saturn
Please help
Answer:
B. Neptune. Neptune is next to Uranus