.A solution that serves as a pH indicator may be made using red cabbage, which is frequently available in homes. In essence, the color of the cabbage depends on the acidity of the solution and a pigment molecule called flavin or anthocyanin.
To determine whether a material is an acid or a base, red cabbage indicator is a purple-colored solution
Vinegar is an acid and its pH value is less than 7 and hence
Red color is produced
Baking soda is base and its pH value is greater than 7 and between 8-9
and the color produced is sky blue
Bleach is the green which is also a basic and because the pH value is 10-11
Householder cleaner is having pH 11-13 which is basic and hence the yellow is the color of household cleaner .
A basic solution goes away from being basic and toward the center of the pH scale when an acid is introduced. The base is "neutralized" in this manner.
Learn more about pH value here
https://brainly.com/question/19584961
#SPJ10
The ideal gas law only approximates the behaviour of real gases. The conditions
under which the ideal gas law is MOST accurate are
a. Low pressure and high temperature
b. Low pressure and low temperature
c. High pressure and high temperature
d. High pressure and low temperature
anyone? got an answer
(a) write the net acid-base reaction that occurs when hi is added to water. (use the lowest possible coefficients. omit states-of-matter in your answer.)
The net acid-base reaction that occurs when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
What is an acid base reaction?A acid base reaction involves the transfer of a proton in the Bronsted- Lowry sense. In this case, the acid is the lone pair donor while the base is the lone pair acceptor.
Thus;
HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq). This the net acid-base reaction that occurs when HI is added to water.
Learn more about acid base reaction:https://brainly.com/question/15220646?
#SPJ11
The net acid-base reaction that takes place when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
What is an acid-base reaction?
An acid-base reaction involves the shift of a proton in the Bronsted Lowry sense. The acid is the lone pair giver while the base is the lone pair acceptor(takes the lone pair). The acid and base reaction will rely upon the strength of the acid and base. This eventually means if the reaction is between a strong acid and a weak base then its result will differ from the reaction between a strong acid and a strong base or a weak acid and a weak base.
Therefore; HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
The above-mentioned equation is the net acid-base reaction that occurs when HI is added to water.
Learn more about the acid-base reaction here:
https://brainly.com/question/1056445
#SPJ10
Which of the following reactions depicts a decompostion reaction?
Answer:
B it is decomposition reaction
Explanation:
In decomposition reaction compound is broken into two or other elements
a serving of a particular fruit dessert contains 20.0 g of sugar. if all the sugar is sucrose, c12h22o11, how many molecules of sugar are present in this serving?
Taking into account the definition of Avogadro's number and molar mass, 3.49334×10²² molecules of sucrose are present.
Definition of molar massThe molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Avogadro's NumberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Molecules of sugar in this caseIn first place, the molar mass of sucrose is 342 g/mole. So, you can apply the following rule of three: If by definition of molar mass 342 grams of the compound are contained in 1 mole, 20 grams of the compound are contained in how many moles?
[tex]amount of moles=\frac{20 gramsx1 mole}{342 grams}[/tex]
amount of moles= 0.058 moles
Now, considering the Avogadro's number, you can apply the following rule of three: If 1 mole of the compound contains 6.023×10²³ molecules, 0.058 moles contains how many molecules?
amount of moleculas= (6.023×10²³ molecules × 0.058 moles)÷ 1 mole
amount of molecules= 3.49334×10²² molecules
Finally, 3.49334×10²² molecules of sucrose are present.
Learn more about
molar mass:
brainly.com/question/5216907
brainly.com/question/11209783
brainly.com/question/7132033
brainly.com/question/17249726
Avogadro's Number:
brainly.com/question/11907018
brainly.com/question/1445383
brainly.com/question/1528951
#SPJ12
Please Answer!!!!
Which equation is balanced?
A) H₂+ O2 → H₂O + O2
B) 4H2₂+ O2 → H₂O + O
C) 2H₂ + O2 → 2H₂O
D) H₂ + O2 → H₂O
Option C is the correct answer
2H₂ + O2 → 2H₂OIn LHSNo. of hydrogen atoms is 4No. of oxygen atoms is 2In RHS No. of hydrogen atoms is 4No. of oxygen atoms is 2Hence , LHS = RHS
A balanced equation obey the law of conservation of mass. According to this law mass can neither be created nor be destroyed. Among the given options, the balanced equation is 2H₂ + O₂ → 2H₂O. The correct option is C.
What is a balanced equation?A chemical equation in which the number of atoms of reactants and products are equal on both sides of the equation is defined as the balanced chemical equation. The numbers which are used to balance the equation are called the coefficients.
The coefficients are generally placed in front of the formulas. The substances on the left hand side are called the reactants and the substances on the right hand side are called the products.
Here the balanced equation is:
2H₂ + O₂ → 2H₂O
The number of 'H' and 'O' atoms are equal on both sides.
Thus the correct option is C.
To know more about balanced equation, visit;
https://brainly.com/question/29769009
#SPJ5
Calculate the root mean square velocity of I2(g) at 373 K.
From the calculations, the root mean square speed is 6.1 m/s.
What is the root mean square speed?The root mean square speed of a gas is obtained by the use of the formula;
V rms = √3RT/M
Where;
R = gas constant
T = temperature
M = molar mass
V rms =√3 * 8.314 * 373/254
V rms =6.1 m/s
Learn more about root mean square speed:https://brainly.com/question/7213287?
#SPJ1
pls help
1.
when a magnet spins within a coil of wires, what is produced?
-blue sparks
-glowing light
-nuclear energy
-an electric current
2.
when an electric current flows through a wire:
-a gravitational field is created around the wire
-the wire becomes very cold
-the wire begins to spin
-a magnetic field is created around the wire
help pls
Answer:
1d and 2d is the answer. Hope it helps
What are the environmental impacts of chemical industries using distillation to separate chemical solutions?
Answer:
The production process often produces offensive odours and may also create by-products that can contaminate air and ground water. Many industrial separation processes have requirements and consequences that influence where they are located.
Explanation:
hope it's helpful to you
Task 2. Protecting Your Model Village from Tsunamis In this task, you will design a model village to withstand the effects of a tsunami. Estimated time to complete: 1 hour You will need the following materials: 2 pieces of printer paper, 8 inches × 11 inches 2 pieces of card stock, 8 inches × 11 inches 1 piece of cardboard, 8 inches × 11 inches a long, shallow plastic container, around 30 inches long, 15 inches wide, and 5 inches deep tape or glue a small plate or tray water a ruler a small bag of sand, about 2 pounds Hypothesis and Data Collection
Part A Before you design your model village, write down the problems you observed in task 1. What were the largest risks to the community? What happened to the homes?
Part B Design a model village that addresses the problems you identified. Consider the following questions: Does elevation play a factor? If so, can the elevation be changed to protect the homes? Could the residents build a structure that would prevent a tsunami from reaching the community? What would this structure look like? How would the residents build it? What could limit the erosion of the beach?
Part C After you design your model, build your homes and place them in the same positions as they were in task 1. Build any additional structures you think will help protect these homes. Repeat the tsunami experiment from task 1, pushing the waves three to four times.
Analyze and Extend Part A Did your results match your predictions about the additional structure protecting the homes?
Part B To prevent damage from natural hazards, scientists must consider the best ways to keep people safe while also considering practicality in terms of cost, interference of new structures in day-to-day life, and other such factors. If your plan worked, was it a practical solution for the community? Can you think of any downsides to your plan? If it didn’t work, how would you improve your plan? Can you foresee any problems with executing your plan?
Part C. Tsunami evacuation plans often consider the elevation of the community and its distance from the shoreline when deciding which towns to evacuate. How could this data help in building new homes and communities along coastal areas that are prone to tsunamis?
Part D
The home in the picture below is from a tsunami-prone area. Based on the results of your experiment, do you think the structure of this home would protect against tsunamis? I'LL GIVE BRAINLIEST TOO.
The structure of this home would protect against tsunamis due to its height and hard structure.
Does the structure of this home would protect against tsunamis?Yes, in my opinion, the structure of this home would protect against tsunamis because of 8 foot tall wall that is present around the house. This wall is enough to protect the house from tsunamis due to its long height and hard composition.
So we can conclude that the structure of this home would protect against tsunamis due to its height and hard structure.
Learn more about tsunamis here: https://brainly.com/question/7697233
#SPJ1
Which are correct statements about the emission spectrum of hydrogen in the visible region
The statement that is correct about the emission spectrum of hydrogen in the visible region is that the line corresponding to the greatest emission of energy is in the ultraviolet region.
What is hydrogen spectrum?Hydrogen spectrum is defined as the dissociation of hydrogen atom upon action of electric current into spectral lines that can be seen in that visible light.
These lines falls under the electromagnetic wave of ultraviolet and infrared regions. But the lines of greatest emission is found in the ultraviolet region.
Learn more about electromagnetic wave here:
https://brainly.com/question/13874687
#SPJ12
What is the noble gas configuration for tellurium (Te)?
The Periodic Table
OA. [Kr] 5s²4d105p4
O B. [Kr] 5s25p65d8
O C. [Xe] 5s25065
O D. [Xe] 5s24d1¹05p4
The correct answer to this question is option A.
6. How many grams are present in 13.2 moles of O₂?
Answer:
422.3868 Grams
Explanation:
13.2 (MOLES) * 31.999 (Dioxygen's Molar Mass) = 422.3868 (Grams Present)
Calculate the bond length (in picometers) of a chemical bond between bromine and sulfur.
Bromine—atomic radius: 119 pm; covalent radius: 114 pm; ionic radius: 182 pm.
Sulfur—atomic radius: 109 pm; covalent radius: 102 pm; ionic radius: 184 pm.
The bond length of a chemical bond between bromine and sulfur is 216 picometers.
Explanation:Bromine and sulfur reacts with each other to form Sulfur dibromide.Sulfur dibromide is a covalent compound which means that a chemical bond exist between them is covalent bond.So, for finding a bond length of a covalently bonded compound we need to add the covalent radiuses of the two atoms.Given,
Covalent radius of bromine is 114 pm;
and covalent radius of sulfur is102 pm.
∴ Bond length of the sulfur dibromide= Covalent radius of bromine + covalent radius of sulfur
∴ Bond length = 114 + 102
∴ Bond length = 216 pm.
Learn more about Covalent bond here...
https://brainly.com/question/3447218
#SPJ10
How many moles of na2so4 are present in 284.078 grams of na2so4?
a. 2
b. 3
c. 5
d. 6
The liquids having same boiling point cannot be seperated from its mixture by distillation, why?
Answer:
Explanation:
They cannot be separated by distillation since it depends on a liquid's ability to boil at a certain temperature. If you have two liquids with the same boiling temperatures, the proportion of each in the vapor phase will be about equal, making it impossible to separate them. Although they presumably do not have the same freezing point, you might use a different method like chromatography or work with their freezing points instead. You could then selectively crystallize one component while leaving the other as a pure liquid.
____________
Definitions:
Distillation:
#1: The volatilization or evaporation and subsequent condensation of a liquid, as when water is boiled in a retort and then the steam is condensed in a cool receiver.
Answer:
Because different compounds often have different boiling points, the components often separate from a mixture when the mixture is distilled. The boiling point is the temperature at which the vapor pressure of the liquid phase of a compound equals the external pressure acting on the surface of the liquid.
Explanation:
Solve the given division and express the answer in terms of scientific notation. 4.8
x 104 by 1.6 × 10³ =
How many grams of nitrogen,
N2, would be required to create 9.3
moles ammonia, NH3?
Answer:
Explanation:
Hi there!
N₂+3H₂⇋2NH₃
The molecular mass of NH₃ is 34
The mass of N₂ is 28 and mass of H₂ is 2.
Then,
2 moles of NH₃ is created by 28 g of N₂
1 moles of NH₃ is created by 28/2 g of N₂
9.3g of NH₃ is created by (28/2)*9.3 moles of N₂
Therefore, 130.2 g of N₂ is required to create 9.3 moles of NH₃.
Hope it helps!
N₂+3H₂⇔2NH₃
moles N₂ = 1/2 x 9.3 = 4.65
mass N₂ = 4.65 x 28 g/mol = 130.2 g
All of the following are physical properties except a. density b. colour c. reaction with oxygen d. melting point
Answer:
C
Explanation:
a, b and d are physical properties ..... the compound or element in question has not changed its identity
c when combined with oxygen, it has changed to a different compound via CHEMICAL property.
A 250.ml sample of water was
boiled to 97.0°C then placed on
the counter to cool. If the water
cooled to11.0°C, how much heat
did it lose? Remember the
specific heat of water is 4.184
J/g°C.
Answer: The solubility of this gaseous solute will be,
Explanation :
First, we have to calculate the concentration of solute.
Now we have to calculate Henry's law constant.
Using Henry's law :
where,
C = concentration of solute =
p = partial pressure = 27.59 kPa
= Henry's law constant =?
Now put all the given values in the above formula, and we get:
Now we have to calculate the solubility of this gaseous solute when its pressure is 79.39 kPa.
Therefore, the solubility of this gaseous solute will be,
Hello can someone help me please and thanksss
the equation of the parabola is given as [tex]y = 1/4 (x-6)^2 +1[/tex]. D
How to find the parabolaGiven the focus(6,2) and the directrix, y = 0
Use the formula
[tex]\sqrt{(x-6)^{2} + (y-2)^{2} } }[/tex] = (y - 0)
Find the square of both sides, square root is removed from the side with it and square added on the other side
[tex](x-6)^2 + (y-2)^2 = (y- 0)^{2}[/tex]
Expand the expression and bring all terms to one side
[tex]x^{2} - 6x - 6x + 36 +y^{2} -2y- 2y +4[/tex] = [tex]y^{2} - 0[/tex]
Collect like terms
[tex]x^{2} - 12x -4y + 40 = 0[/tex]
Make 'y' the subject of the formula
[tex]4y = x^{2} - 12x + 40[/tex]
Divide through by 4 and substrate 4 from 40 to give a perfect quadratic equation
[tex]y = 1/4( x^{2} - 12x + 36) + 4[/tex]
1/4 is dividing the quadratic equation [tex]x^2 - 12x +36[/tex]
Then divide factor by 4 to give 1, this is so because of the nature of the options given
[tex]y = 1/4( x^{2} -6x -6x +36) + 1[/tex]
Simplify the expanded quadratic equation
[tex]y = x (x -6) - 6 (x- 6)[/tex], we have [tex](x - 6) ^2[/tex]
Then insert in place into previous equation
[tex]y = 1/4 (x-6)^2 + 1[/tex]
Thus, the equation of the parabola is given as [tex]y = 1/4 (x-6)^2 +1[/tex]
Learn more about a parabola here:
https://brainly.com/question/4061870
#SPJ1
would mean alot to help
Answer:
n
Explanation:
nobody knows
Answer: O
Explanation:
Out of the given elements, oxygen has the highest electronegativity.
Select the correct answer.
Which substance in this redox reaction is the oxidizing agent?
Cu + 2AgNO3 → 2Ag + Cu(NO3)2
A.
N
B.
AgNO3
C.
Cu
D.
NO3−
E.
Cu(NO3)2
Reset Next
Post Test: Chemical Reactions
© 2022 Edmentum. All rights reserved.
Answer:
CU
Explanation:
Cu is the correct answer if I'm correct
An electron on an energy level has an energy of 16.32 x 10−19 J. It moves to another level by absorbing 5.4 x 10−19 J of energy. Which of the following descriptions most likely explains what occurred?
The electron moved down to an energy level and has an energy of 10.92 x 10−19 J.
The electron moved down to an energy level and has an energy of 21.72 x 10−19 J.
The electron moved up to an energy level and has an energy of 10.92 x 10−19 J.
The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
Answer:
The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
Explanation:
i know
Answer:
D) The electron moved up to an energy level and has an energy of 21.72 x 10−19 J.
Explanation:
I took the test and got it right.
When hydrated copper(II) sulfate crystals are heated, anhydrous copper(II) sulfate forms. A mass of 12.5 g of hydrated copper(II) sulfate crystals is heated in a crucible until all the water of crystallisation is removed.
A mass of 8.0 g of anhydrous copper(II) sulfate forms.
Calculate the formula of hydrated copper(II) sulfate CuSO4.nH2O
Show your working.
[Mr of CuSO4 = 159.5 Mr of H2O = 18]
Mass of water = g
Water of crystallization (n) =
Formula of hydrated copper(II) sulfate =
The formula of hydrated copper(II) sulfate is CuSO4.10H2O
What is the formula of the hydrated copper (ii) sulfate salt?The formula of the hydrated copper (ii) sulfate is determined as follows:
Mass of hydrated salt = 12.5 g
Mass of anhydrous salt = 8.0 g
Mass of water = 12.5 - 8 = 4.5 g
mole ratio of water and anhydrous salt is;
4.5/18 : 8.0/159.5
0.562 : 0.05
10 : 1
Water of crystallization (n) = 10.
Therefore, the formula of hydrated copper(II) sulfate is CuSO4.10H2O
Learn more about water of crystallization at: https://brainly.com/question/26146814
#SPJ1
How many grams Fe2O3 would be
required to make 187 g Fe?
Fe₂O3 + 3CO → 2Fe + 3CO₂
266.63g of Fe2O3 would be required to make 187 g Fe in accordance with the following equation: Fe₂O3 + 3CO → 2Fe + 3CO₂.
How to calculate mass?The mass of a product or reactant can be calculated using stoichiometry as follows:
According to this question, iron oxide reacts with carbon monoxide as follows:
Fe₂O3 + 3CO → 2Fe + 3CO₂
1 mole of Fe2O3 produces 2 moles of Fe
Moles of Fe = 187/56 = 3.34mol
3.34/2 = 1.67 moles of Fe2O3 will be required to produce 3.34 moles of Fe.
mass of Fe2O3 = 1.67 mol × 159.69 g/mol = 266.63g
Therefore, 266.63g of Fe2O3 would be required to make 187 g Fe in accordance with the following equation: Fe₂O3 + 3CO → 2Fe + 3CO₂.
Learn more about mass at: https://brainly.com/question/14122402
#SPJ1
You are trying to determine the
mass of sodium chloride required to
create a 0.875 m solution in 534 g of
water. How many moles of NaCl are
required?
Answer:
Answer:
Mass = 27.291 g
Explanation:
Given data:
Mass of sodium chloride = ?
Mass of water = 534 g
Molality = 0.875 m
Solution:
Molality:
It is the number of moles of solute into kilogram of solvent.
Formula:
Molality = number of moles of solute / kilogram solvent
Mathematical expression:
m = n/kg
Now we will convert the g into kg.
Mass of water = 534 g× 1kg/1000 g = 0.534 kg
Now we will put the values in formula.
0.875 m = n / 0.534 kg
n = 0.467 mol
Now we will calculate the mass of sodium chloride:
Mass = number of moles × molar mass
Mass = 0.467 mol × 58.44 g/mol
Mass = 27.291 g
Instructions: In this virtual lab, you will use a virtual spectrometer to analyze astronomical bodies in space. Record your hypothesis and spectrometric results in the lab report below. You will submit your completed report to your instructor.
The main function of using a virtual spectrometer in order to analyze astronomical bodies in space is to find the chemical composition of planets and stars.
What is a Virtual Spectrometer?This refers to the instrument that is used to observe the color separation of light in a controlled experiment.
Hence, we can see that another reason for the use of a virtual spectrometer to make an analysis of astronomical bodies is to indicate the speed and direction of a star or galaxy as it spreads incoming beams of light into different spectrums.
Read more about virtual spectrometers here:
https://brainly.com/question/21578855
#SPJ1
Changes in which measurements do not shift the equilibrium of a chemical system
Any Change in the amount of an inert gas into a gas-phase equilibrium at constant volume does not result in a shift of the equilibrium of a chemical system. This follows the equilibrium law.
What is Equilibrium law ?According to this principle, Adding an inert gas into a gas-phase equilibrium at constant volume does not result in a shift.
This is because the addition of a non-reactive gas does not change the partial pressures of the other gases in the container.
While the total pressure of the system increases, the total pressure does not have any effect on the equilibrium constant.
Learn more about chemical equilibrium here;
https://brainly.com/question/5537989
#SPJ1
Using a ph meter, you find the ph of an unknown solution to be 8. 0. How would you describe this solution?.
Answer:
Just Barely Base/Neutral
Explanation:
a pH of 8.0 is greater than Neutral (7.0) but is still neutral due to it being more neutral than a base
