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Elenna [48]
3 years ago
11

Why is water and iodine different substances with different properties?

Chemistry
2 answers:
Lady bird [3.3K]3 years ago
4 0

Answer: Water has Hydrogen and Iodine has way more stuff than water in it to make that substance.

Explanation:

lions [1.4K]3 years ago
3 0
Water and Iodine are different substances with different properties because they are made of different molecules.
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The half-life of a positron is very short. It reacts with an electron, and the masses of both are converted to two gamma-ray pho
sp2606 [1]

Explanation:

(a)   It is known that relation between energy and mass is as follows.

            E = 2 \times mc^{2}

where,    E = energy

              m = mass

              c = speed of light = 3 \times 10^{8} m/s

As it is given that mass is 9.109 \times 10^{-31} kg. So, putting the given values into the above formula as follows.

             E = 2 \times mc^{2}

                       = 2 \times 9.109 \times 10^{-31} kg \times 3 \times 10^{8}m/s

                       = 1.638 \times 10^{-13} J

Therefore, we can conclude that the energy produced by the reaction between one electron and one positron is 1.638 \times 10^{-13} J.

(b) When gamma ray photons are produced then they will have the same frequency. Relation between energy and frequency is as follows.

                    E = h \times \nu   ..... (1)

where,     h = plank's constant = 6.626 \times 10^{-34} J.s

              \nu = frequency

Also,     E = 2 \times mc^{2} ........ (2)

Hence, equating equations (1) and (2) as follows.

                    h \times \nu = 2 \times mc^{2}        

So,    

6.626 \times 10^{-34} Js \times \nu = 1.638 \times 10^{-13} J

                           \nu = 1.236 \times 10^{20} Hz

Thus, we can conclude that the frequency is 1.236 \times 10^{20} Hz.

5 0
4 years ago
A 0.227 mol chunk of dry ice (solid CO2) changes to gas. What is the volume of that gas measured at 27 °C and 740 mmHg?
jeka57 [31]

Answer:

Explanation:3.2 ft 2 fti2 ft 4 ft ft2

4 0
3 years ago
What are stars made of? Group of answer choices
Alex787 [66]

Answer:

The correct answer is option A.

Explanation:

Stars are bundles of hot gases which primarily consists of  hydrogen gas and then helium. Their shine is due to thermonuclear fusion of hydrogen into helium or burning of hydrogen gas into helium in their cores which releases large amount of energy and later this process leads to formation of some heavier elements.

3 0
3 years ago
In the following reaction, how many liters of oxygen will react with 124.5 liters of propane (C3H8), at STP?
nexus9112 [7]

In the following reaction,76.616 litre of oxygen will react

8 0
3 years ago
What is the pH of a 2.2 M solution of HClO4?
agasfer [191]
Since HClO4 is a strong acid it will completely dissociate in solution. 

HClO4 + H2O --> H3O+ + ClO4-

Therefore, your concentration of HClO4 will be equal to your amount of H3O+, the conjugate acid in solution. 

The Ka expression is as follows:

Ka= [H3O+][ClO4-] / [HClO4] 

So you know that -log [H3O+] gets you pH, so just plug in [2.2] as your concentration of H3O+ and your answer should be -.34 pH


7 0
4 years ago
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