Answer:
[tex]{\rm Zn^{2+}}\, (aq) + {\rm 2\; OH^{-}}\, (aq) \to {\rm Zn(OH)_2}\, (s)[/tex].
Explanation:
Ionic Equation for this reactionRewrite only the species that exist as ions. Those species typically include:
soluble salts,strong acids, and soluble bases.In this reaction, both [tex]{\rm ZnBr_2}\, (aq)[/tex] and [tex]{\rm NaBr}\, (aq)[/tex] are salts. The state symbol "[tex](aq)[/tex]" suggests that both of these salts are soluble. Hence, both of these salts exist as ions and should be rewritten:
Each [tex]{\rm ZnBr_2}\, (aq)[/tex] formula unit would exist as one [tex]{\rm {Zn}^{2+}}\, (aq)[/tex] and [tex]2\; {\rm Br^{-}}\, (aq)[/tex]. Notice how there are twice as many [tex]{\rm Br^{-}}[/tex] ions as [tex]{\rm {Zn}^{2+}}[/tex] ions.Each [tex]{\rm NaBr}\, (aq)[/tex] formula unit would exist as one [tex]{\rm Na^{+}}\, (aq)[/tex] and one [tex]{\rm Br^{-}}\, (aq)[/tex].Similarly, the state symbol "[tex](aq)[/tex]" suggests that the base [tex]\rm NaOH[/tex] is also soluble:
Each [tex]{\rm NaOH}\, (aq)[/tex] formula unit would exist as one [tex]{\rm Na^{+}}\, (aq)[/tex] and one [tex]{\rm OH^{-}}\, (aq)[/tex].On the other hand, the state symbol "[tex](s)[/tex]" suggests that the base [tex]{\rm Zn(OH)_2}\, (s)[/tex] is a precipitate and is not soluble. Rather, the bonds within [tex]{\rm Zn(OH)_2}[/tex] stay mostly intact, and this species would not exist as ions. Hence, do not rewrite [tex]{\rm Zn(OH)_2}\, (s)\![/tex] when deriving the ionic equation for this reaction.
Hence, the ionic equation for this reaction would be:
[tex]\begin{aligned}&\underbrace{{\rm Zn^{2+}}\, (aq) + 2\, {\rm Br^{-}}\, (aq)}_{\text{from ${\rm ZnBr_2}\, (aq)$}} + \underbrace{2\, {\rm Na^{+}}\, (aq) + 2\, {\rm OH^{-}}\, (aq)}_{\text{from $2\, {\rm NaOH}\, (aq)$}} \\ & \to \underbrace{{\rm Zn(OH)_2}\, (s)}_{\text{precipitate}} + \underbrace{2\, {\rm Na^{+}}\, (aq) + 2\, {\rm Br^{-}}\, (aq)}_{\text{from $2\, {\rm NaBr}\, (aq)$}}\end{aligned}[/tex].
Net Ionic Equation for this reactionEliminate species that are present on both sides of the ionic equation to obtain the net ionic equation. A species should be eliminated if only if an equal number of this species are found on both sides of the ionic equation. Otherwise, subtract from the side with a larger number of that species.
For this reaction, the net ionic equation would be:
[tex]{\rm Zn^{2+}}\, (aq) + {\rm 2\; OH^{-}}\, (aq) \to {\rm Zn(OH)_2}\, (s)[/tex].
Calculate the mass of 4 moles of CuCl2.
Pleas help with 2 and 4 for brainliest
mass of pentane : = 30.303 g
moles of Al₂(CO₃)₃ : = 0.147
Further explanationGiven
1. Reaction
C₅H₁₂+8O₂→6H₂O+5CO₂.
45.3 g water
2. 2AlCl₃ + 3MgCO₃ → Al₂(CO₃)₃ + 3MgCl₂
37.2 MgCO₃
Required
mass of pentane
moles of Al₂(CO₃)₃
Solution
1. mol water = 45.3 : 18 g/mol = 2.52
From equation, mol ratio of C₅H₁₂ : H₂O = 1 : 6, so mol pentane :
= 1/6 x mol H₂O
= 1/6 x 2.52
= 0.42
Mass pentane :
= mol x MW
= 0.42 x 72.15 g/mol
= 30.303 g
2. mol MgCO₃ : 37.2 : 84,3139 g/mol = 0.44
mol Al₂(CO₃)₃ :
= 1/3 x mol MgCO₃
= 1/3 x 0.44
= 0.147
Although chemical digestion occurs throughout the digestive system, it mostly occurs in the A esophagus and stomach
B
liver and gall bladder
C
liver and pancreas
D
stomach and intestines
How is agriculture depended on industries
Answer:
The interdependence of agriculture and industry helps the development of both the sectors. The most important aspect of this inter dependence is that the products of one serve as important inputs for the other. Growth of one sector, thus means ample supply of inputs for the other.
Explanation:
A heavily wooded area needs additional solar collectors to meet energy demand. Which statement describes a possible environmental consequence of adding these collectors?
A.
The amount of air pollution will increase.
B.
The amount of water pollution will increase.
C.
More trees will need to be planted to insulate the solar collectors.
D.
Trees will need to be cleared for the solar collectors to work efficiently.
Answer:
C
I think not positive good luck tho
A heavily forested area is one that has a dense and large number of trees. The areas like mountainous tracks or the protected frosts areas of wildlife.
In order to have solar collectors that meet the demands of energy generation. Some parts of the forests may have to clear off. As for collecting the sunlight, there needs to be clear ground. As trees and forests absorb insolation.Hence the option D is correct, trees need to to be cleared for working efficiently.
Learn more about the area that needs additional solar collectors to meet energy demand.
brainly.in/question/40583530.
What will be the mass of 9.95 liters of propane gas (C3H8) at STP?
Answer:
19.5g
Explanation:
Given parameters:
Volume of propane gas = 9.95L
Unknown:
Mass of propane gas = ?
Solution:
To solve this problem, find the number of moles first.
At STP;
22.4L of gas makes up 1 mole
9.95L of gas will have a [tex]\frac{9.95}{22.4}[/tex] = 0.44mole
So;
Mass of propane gas = number of moles x molar mass
Molar mass of propane = 3(12) + 8(1) = 44g/mol
Mass = 0.44 x 44 = 19.5g
a container with a volume of 2.5L contains air at a pressure of 0.5 atm. if the volume is reduced to 1.5L at constant temperature, what will be the resulting pressure of the air inside
Answer:
Final pressure of the air inside is 0.83atm
Explanation:
Boyle's law is the gas law that relates the change in volume when pressure change at constant temperature and vice versa. The equation is:
P₁V₁ = P₂V₂
Where P is pressure and V is volume of 1, initial state and 2, final state of the gas
Replacing:
P₁ = 0.5atm
V₁ = 2.5L
P₂ = ?
V₂ = 1.5L
P₁V₁ = P₂V₂
0.5atm*2.5L = P₂*1.5L
0.83atm = P₂
Final pressure of the air inside is 0.83atm
A metal ion (X) with a charge of 2+ is attracted to a nonmetal ion (Z) with a charge of 3-.Which formula represents the resulting compound?
Answer:
X₃Z₂
Explanation:
A metal ion (X) with a charge of 2+ = X²⁺
nonmetal ion (Z) with a charge of 3- = Z³⁻
In a neutral compound, the charges but balance each other to remain neutral. However in this case, the charges are not balanced.
A simple way to make the charges balance is by tweaking the number of the ions present in the compound.
We do this by multiplying the metal ion with 3 and the non metal ion by 2.
That way we have;
Metal ion = 3X2⁺ (Total charge - 6⁺)
Non metal ion = 2Z3⁻ (Total charge - 6⁻)
The charges are now balanced. The formular of the compound is;
X₃Z₂
Low, gray, layered clouds that cover the sky and bring steady rain are O A. cumulus O B. cirrus O C. cumulonimbus OD. nimbostratus
Answer:
D Nimbostratus
Explanation:
Which statement below is TRUE about COMPOUNDS? *
a) Compounds are made up of the same type of atoms.
b) Compounds are made up of only 1 atom.
d) Compounds are made up of different atoms stuck together.
d) Compounds can only contain 2 atoms.
I'll give brainliest for a legitimate answer
Can someone give me a legitimately good idea for a chem honors project. It's due May or something so no rush at all but like maybe just an idea. It needs to take at least ten hours total. So if you ever had to do one maybe I could get the idea for it? Something nature related. I live in a super nature-y environment so anything to do with analyzing some sort of chemistry in nature, I don't know, I just need an idea. Thanks.
Answer:
I don't know if this is what you are looking for but maybe making paints out of things you find outside??? sry if this isn't what you were looking for
The citizens of a town are aware of climate change, and they want to make changes to control it. One change they consider is replacing the nearby thermal power plant with a hydroelectric plant. If they want to make sure this change will help to slow climate change, which question should they ask?
Answer: How hydroelectric plant is better over thermal power plant in creating less pollution?
Explanation:
The thermal power plant utilizes the coal as a fuel. The heat energy so produce after burning coal is used for generating electrical energy. The burning of the coal results in the production of pollutants. The carbon dioxide is also a chief pollutant of coal burning. This can pollute the air.
The hydroelectric plant is better than thermal power plant in the sense no fuel is required for this purpose the energy from water currents are used for generating electrical energy.
So, the citizens should research about hydroelectric plant and try to know how it is efficient in providing routine energy supply and impact it exerts on the environment if used as a source of energy generation.
Energy of motion is called ________energy *
Answer:
Kinetic - Kinetic energy is the energy of motion
Explanation:
Thermal energy - heat energy
Potential energy - energy that is stored
Hope this helped!
Have a supercalifragilisticexpialidocious day!
name a metal that would be magnetic
help me pleeeeeeeaaaaassseeeeee
Answer:
okay
Explanation:
I can help u u can ask question .....
how many grams of NH3 can be prepared from 77.3 grams of N2 and 24.2 grams of H2?
Answer:
how many grams of NH3 can be prepared from 77.3 grams of N2 and 24.2 grams of H2?
=80.4 g
Explanation:
I think.
How to calculate the number of molecules in 18g of H2O
We, know molecular mass of water is, M = 16 g/mol .
Given mass of water, m = 18 g.
We know, number of moles is given by :
[tex]n = \dfrac{18\ g}{16 \ g/mol}\\\\n = 1.125\ moles[/tex]
Now, 1 mole of any compound contains 6.022 × 10²³ molecules.
So, number of moles in 1.125 moles of water is 1.125 × 6.022 × 10²³ =
6.77 × 10²³ molecules.
Hence, this is the required solution.
Which instrument is used to measure mass?
Answer:
Balance
Explanation:
hope i helped
Which of the following is true about homogeneous mixtures?
They consist of two or more phases; They are always liquids; They are known as solutions; They have compositions that never vary
Answer:
Option 3: They are known as solutions
Explanation:
Examples of homogenous mixtures include:
soapy watertea or coffee that's breweda mixture of water and alcoholbloodairquartznitrogenI hope this helps :)
If 50.0g of kcl reacts with 50.0 g of 02 to produce KCLO3 according to the following equation, how many grams of kclo3 will be formed
Answer:
Mass = 82.11 g
Explanation:
Given data:
Mass of KCl = 50.0 g
Mass of O₂ = 50.0 g
Mass of KClO₃ produced = ?
Solution:
Chemical equation:
2KCl + 3O₂ → 2KClO₃
Number of moles of KCl:
Number of moles = mass /molar mass
Number of moles = 50.0 g/ 74.5 g/mol
Number of moles = 0.67 mol
Number of moles of O₂:
Number of moles = mass /molar mass
Number of moles = 50.0 g/ 32 g/mol
Number of moles = 1.56 mol
Now we will compare the moles of oxygen and KCl.
O₂ : KClO₃
3 : 2
1.56 : 2/3×1.56 = 1.04 mol
KCl : KClO₃
2 : 2
0.67 : 0.67
Number of moles of KClO₃ formed by KCl are less thus, it will act as limiting reactant.
Mass of KClO₃:
Mass = number of moles × molar mass
Mass = 0.67 mol ×122.55 g/mol
Mass = 82.11 g
How much light would be absorbed by the different drinks?
Drink A would absorb more light than Drink B.
what is another name for producer why are they called this
Answer:
Autotrophs
Explanation:
They are responsible for the production of food. Root words "auto" for self and "troph" for food.
Need help balancing equations please.
Answer:
A, 4,3,2
B, 1,1,2
C, 1,1,1,2
help ? if yk the answer ? please help k
Answer:
1: X and Y
2: A
Explanation:
What are the main organs of the muscular system?
The muscular system is an organ system consisting of skeletal, smooth and cardiac muscles. It permits movement of the body, maintains posture and circulates blood throughout the body.
Answer:
Skeletal, cardiac muscles.
Explanation:
It helps move the body around. Your welcome :)
What type of compound is AIN?
Answer:
aluminum nitride
Explanation:
i think
why do astronauts on the moon seem like they're "Walking on springs" while on earth we are firmly attached to the ground
If I have one mole of sulfur, how many grams would it weigh?
Answer:
32.06 grams
Explanation:
One mole of sulfur is equal to 32.06 grams of sulfur.
Answer:ok
Explanatio
heres the answer 32.065 grams because 1 mole is equal to 1 moles Sulfur
60\15A=
help help help help help help help help help help
this is just 60 divided by 15, which is 4
so your answer is 4A :)
Answer:
60 divided by 15? That's 4 if that's what you're asking
In an experiment, potassium chlorate decomposed according to the following chemical equation.
2 KClO3 → 2 KCl + 3 O2
If the mass of potassium chlorate was 240 grams, what is the mass of oxygen gas formed?
Answer Choices:
A)
94.03g
B)
1378g
C)
41.8g
D)
612.5g