CHEMISTRY HIGH SCHOOL

Explain the iodine clock reaction.

Answers

Answer 1
Answer: Iodine clock reaction is a combination of hydrogen peroxide and sulfuric acid. When these are poured together, there is no reaction at first, but after time, a colored reaction will happen to the liquid and may change back to the original color. This idea was discovered by Hans Landolt in the late 1800s.

Related Questions

#1. Which statement is a correct expression of the Law of Conservation of Mass? A. The total mass is unpredictable in a chemical reaction. B. The total mass remains the same during a chemical reaction. C. The total mass decreases during a chemical reaction. D. The total mass increases in a chemical reaction. #2. Which element(s) are not balanced in this equation?Fe2O3 + 3 CO → Fe + 3 CO2 A. Only the Fe is unbalanced. B. Only the O is unbalanced C. Fe and O are both unbalanced. D. C and O are both unbalanced
What is the volume of 2.1 moles of chlorine gas (Cl2) at standard temperature and pressure (STP)?
**98 POINTS** Given 1.00 gram of (NH4)2 CO3, how many grams of this sample would be due to hydrogen?
Which statement most accurately expresses themain idea of this passage? (1) Information technology will make it easier to buy and sell goods. (2) Information technology will make capitalism obsolete. (3) Government must regulate the information technology industry. (4) The costs of information technology will outweigh its benefits.
Water (H2O) is considered a mineral because it is inorganic and occurs naturally.a. True b. False

When you have ACT Chemistry exam What book, file, or where can I get something that I need to study to prepare for the exam? ​

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Answer:

  • The Official ACT Subject Guides are individual prep books perfect for students who want to practice a specific subject to improve their test scores.
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Explanation:

  • Kaplan's ACT Prep Plus: If you're looking for the most comprehensive guide, Kaplan's ACT Prep Plus strives to hit this goal.
  • To prepare for the exam, you'll definitely want to get your hands on a good ACT preparation book. A good preparation book provides all kinds of practice exam questions. It will provide answers to the questions with proper explanation. Furthermore, you will get in-depth details about the topics and much more.

What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution?1.81 M
201 M
5.52 M

Answers

1.       There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

 

Molarity = 612 g (1 mol / 110.96 g) / 3.04 L

Molarity = 1.81 M

1.81 M is the polarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution.

PLEASE HELP ME!!! AAHH IM TRAPPED

Answers

what exactly do you need help with?Your question is quite open ended.

Answer:

you got out?

Explanation:

Jams, jellies, preserves, honey, and other food with high sugar content hardly ever become contaminated by bacteria, even when the food containers are left open at room temperature. This is because bacteria that encounter such an environment ___________.

Answers

Answer:

undergo death as result of the water loss from cell

Explanation:

The ingredients such as honey, jellies, Jams, preserves and other food which have high sugar content are contaminated hardly by the bacteria because due to the presence of high amount of the sugar and carbohydrates, the solution of the them becomes hypertonic in nature and if a bacteria acts on such solution, the result is the loss of the water from their cell and ultimately the bacteria dies. So, they remain fresh even if their containers are left open at the room temperature.

Which nuclear decay emission has the weakest penetrating power?1. alpha particle
2. bera particle
3.gamma radiation
4. positron

Answers

Alpha particle is the nuclear decay emission that has the weakest penetrating power. The correct option among all the options that are given in the question is the first option or option "1". Gamma is a type of radiation and so can be negated as a particle. Alpha particles have the largest radiation and so the weakest penetrating power.

Decomposition of potassium chlorate (KClO3) produces potassium chloride (KCl) and pure oxygen (O2). The balanced equation for the reaction is as follows.mc017-1.jpg
What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g/mol.)

Answers

Molar mass :

KClO₃ = 122.55 g/mol
O₂ = 32 g/mol

2 KClO₃ = 2 KCl + 3 O₂

2 x 122.55 g KClO₃ ----------> 3 x 32 g O₂
10.0 g KClO₃ ------------------> ?

Mass of O₂ = ( 10.0 x 3 x 32 ) / ( 2 x 122.55 )

Mass of O₂ = 960 / 245.1

Mass of O₂ = 3.9167 g

number of moles O₂ => 3.9167 / 32 = 0.1223 moles 

1 mol -------------- 22.4 L ( at STP)
0.1223 moles ---- ?

V = 0.1223 x 22.4 / 1

V = 2.739 L

hope this helps!

Your answer is 2.74.
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Which term describes a substance that increases the concentration of hydroxide ions in solution?Lewis definition of an acid Arrhenius definition of a base Bronsted-Lowry definition of a base Bronsted-Lowry definition of an acid
A carbon-12 atom has a mass of 12.00000 amu. The mass of a proton is 1.00728 amu, and the mass of a neutron is 1.00866 amu. How many protons does the carbon-12 atom have? How many neutrons does the carbon-12 atom have? What is the mass defect of a carbon-12 atom? amu