CHEMISTRY HIGH SCHOOL

A hydrogen ion, H+, in aqueous solution may also be written as(1) H2O (3) H3O+
(2) H2O2 (4) OH–

Answers

Answer 1
Answer:

Answer: Option (3) is the correct answer.

Explanation:

In an aqueous solution, a compound exists in the form of ions that is in the form of protons and electrons.

Protons are positively charged and electrons are negatively charged. A proton (usually hydrogen ion, H^(+)) in water (solvent) also exists as H_(3)O^(+).

For example, H_(2)O + HCl \rightleftharpoons H_(3)O^(+) + Cl^(-)

This shows that the conjugate acid of H_(2)O is H_(3)O^(+).

Thus, we can conclude that a hydrogen ion, H+, in aqueous solution may also be written as H_(3)O^(+).
Answer 2
Answer: The answer is (3) H3O+. In solution, H+ exists interchangeably bound to H2O (as the hydronium ion) and as a free ion. Some books represent strong acids in net ionic equations as simply H3O+

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In which block of the periodic table is chromium (Cr) found?

1. You were tasked to check if the liquid sample you have is a substance or a mixture.Which among these tasks is the BEST way to do so?
1. Color comparison
Il. Taste comparison
III. Boiling Test
iv.
Melting Test

Answers

Answer:

boiling test or melting test

Explanation:

Explain how much risk you think your area has for water scarcity????

Answers

Not very much because half the time the water is purified but just normal water in my area probably has serious levels of scarcity.

Answer:

Explanation: Over pumping refers to pumping fresh water and reducing the level of an underground layer of water. In coastal areas, the lower underground layer of water is infiltrated with salt water, eventually increasing the salinity of the underground layer of water to the point that it is not drinkable. The scarcity of water in the coastal areas because the water in the coastal areas is not drinkable.

How many milliters of a 0.171 solution contains 1.00 g of NaCl

Answers

:  Molar mass of NaCl: 35.4+22.9 = 58.3 g/mol

X milliliters (=X/1000 liters) of a 0.171M solution contain 0.171*X/1000 moles of NaCl.
0.171*X/1000 moles of NaCl = 58.3*0.171*X/1000 g = 1 g (as given)
58.3*0.171*X/1000 = 1
X = 100.3

The process of a material going through a change of state from a gas to a liquid is called _____. melting freezing condensation vaporization

Answers

Condensation is the change in state of matter from gas to liquid.

The process of a material going through a change of state from a gas to a liquid is called _____.

condensation

Regular copyright is more restrictive than any other kind of license. true or flase

Answers

The correct answer is true

Examine the graph below.Choose which of the following is NOT true.

Absolute zero on Kelvin scale is -273°C.
Liquefaction of the gas occurs at approximately -155°C.
Condensation occurs at 0°C.
The gas follows a linear relationship between volume and temperature.

Answers

Answer : The incorrect option is, Condensation occurs at 0^oC.

Explanation :

Absolute zero on Kelvin scale is -273^oC.

This statement is correct because at 0K the temperature in degree Celsius will be, 0K=0-273=-273^oC

Liquefaction of the gas occurs at approximately -155^oC.

This statement is correct. From the given graph the liquification of gas occurs at -155^oC.

The gas follows a linear relationship between volume and temperature.

This statement is correct. According to the Charles law, the volume of gas is directly proportional to the temperature of the gas. So, gas follow the linear relationship between the volume and temperature.

Condensation occurs at 0^oC.

This statement is incorrect because condensation occurs at 100^oC. and the condensation is a process in which the phase changes from the gaseous state to liquid state at constant temperature.

As we know that condensation is a reverse process of vaporization. Both the process occurs at constant temperature 100^oC.

Hence, the incorrect option is, Condensation occurs at 0^oC.
Obviously from the graph, the relationship is linear. Charle's laws also say that so that one can be eliminated. Also using the points on the graph, abolute 0 is -273 and liquefication occurs around -155. That sets the answer to Condensation occurs at 0
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