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3 years ago

Which statement is true about the properties of the majority of the elements in the far left column of the periodic table?

Chemistry

2 answers:

Vadim26 [7]3 years ago

7 0

A bdbdhdhdhdbsbdbdbdbdbd

Sonbull [250]3 years ago

3 0

I believe the answer is A

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In a 0.737 m solution, a weak acid is 12.5% dissociated. calculate ka of the acid.

r-ruslan [8.4K]

Hello! Let me try to answer this :)

Thanks and please correct if there are any mistakes ^ ^

8 0

4 years ago

The thermochemical equation for the reaction of carbon dioxide with sulfur dioxide is shown below. How can the reaction be descr

prisoha [69]

Answer: d. has high activation energy

Activation energy is the energy that a system requires to start a certain process. Also, it is the minimum energy necessary for a given chemical reaction to occur. For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy equal to the activation energy.

As the molecules approach, their electron clouds repel, so energy is required for the collision to occur and therefore the reaction. The activation energy comes from the heat of the system, that is, the translational, vibrational energy, etc. of each molecule. However, if this energy is not enough, the reaction will not be spontaneous.

A reaction between two molecules can be favored by supplying energy to the system. In the case raised in the question, energy equal to 1104 kJ is provided to the system to favor the next reaction

CO2 (g) + 2SO2 (g) → CS2 (g) + 3O2 (g)

Since the energy equal to 1104 kJ is included in the reactants, it can be deduced that it is the energy that is provided to the system for the reaction to occur. However, from the value of this energy it can not be said whether the system is endothermic or exothermic since it is a kinetic variable and the variables of this type do not allow predicting the thermodynamic behavior of a system.

Furthermore, it can be seen that the value of this energy is considerably high, therefore the reaction described has a high activation energy.

3 0

3 years ago

PLEASE HELP ME Which of the following is a Brønsted-Lowry base but not an Arrhenius base?

never [62]

Ur answer is going to be NH 3 or D AND PLEASE MARK ME AS BRAINLIEST CAUSE IVE NEVER GOT BRAINLIEST BEFORE AND HAVE A GOOD DAY !

4 0

3 years ago

Please help me on this!!

Fudgin [204]

Answer:

Explanation:

7 0

3 years ago

The concentration of hydronium ions is greater than 1 × 10–7 for basic solutions. True False

Nataly [62]

Answer : The given statement is, false.

Explanation :

Ionic product of water : It is defined as the product of the concentration of hydrogen ion and the concentration of hydroxide ion.

The mathematical expression will be,

$[H^+][OH^-]=10^{-14}$

When the concentration of hydrogen ion and hydroxide ion are equal then the solution is neutral and the value will be, $1\times 10^{-7}$ . And the pH of the solution is, 7.

When the concentration of hydrogen ion is greater than $1\times 10^{-7}$ then the solution is acidic in nature. And the pH of the solution is, less than 7.

When the concentration of hydrogen ion is less than $1\times 10^{-7}$ then the solution is basic in nature. And the pH of the solution is, greater than 7.

Hence, the given statement is false.

5 0

3 years ago