Which substance can act as an arrhenius base in an aqueous solution

Answers

Answer 1

Answer: The substance that can act as an Arrhenius base in aqueous solution is sodium hydroxide since NaOH dissociates in water giving the sodium ions and the hydroxide ions. An Arrhenius base is a substance that is characterized by forming hydroxide ions in an aqueous solution.

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What is the value of 100 ºC on the Kelvin scale? 100 K

Answers

Answer : The temperature on the Kelvin scale is, 373 K

Solution :

As temperature is given $100^oC$ . Now we have to determine the temperature in Kelvin scale.

Formula used :

$K=273+^oC$

K = temperature in kelvin = ?

$^oC$ = temperature in degree Celsius = $100^oC$

Now put the value of 'K' in the above formula, we get the temperature in kelvin scale.

$K=273+100\n\nK=373$

Therefore, the temperature on the Kelvin scale is, 373 K

0 C = 273 K . . . . 100 C = 373 K

Which two elements have the most similar chemical properties?(1) Be and Mg (3) Cl and Ar
(2) Ca and Br (4) Na and P

Answers

Elements in the same groups shows similar chemical and physical properties. The elements having similar chemical properties are Be and Mg.

What are groups?

A group in periodic table is a column with elements of similar physical and chemical properties.

Both beryllium (Be) and magnesium are in group two with two valence electrons and both are metals. They have similar chemical and physical properties.

Cl is in 17th group and Ar is a 18th group element. They do not show any similarity in chemical properties. One is halogen which is unstable and the second one is noble gas which is stable. Thus no similarity.

Ca is a 2nd group element and Br is 17th group and they are different in chemical properties. One is metal and the second one is halogen with higher electronegativity.

Similarly, Na is in first group and P is 15th group element in periodic table in periodic table and does not show chemical similarities.

Therefore, the elements showing similar chemical properties are Be, Mg thus, option 1 is correct.

To learn more about groups in periodic table, refer the link below:

brainly.com/question/13219625

#SPJ5

atoms are made of 3 types of sub atomic particles- protons, neutrons and electrons

from these 3 particles, electrons are responsible for participating in chemical bonds. therefore chemical properties of elements are based on the number of electrons present.

valence electrons are the number of electrons in the outermost energy shell that are involved in chemical bonds.

atoms with same number of valence electrons are grouped in to columns called groups.

therefore elements of the same group have same number of valence electrons, hence similar chemical properties.

from the options given

only Be and Mg belong to the same group they both belong to group 2 with 2 valence electrons

therefore Be and Mg have similar chemical properties

answer is

1) Be and Mg

What do alkaline earth elements have in common

Answers

The alkaline earth metals are all of the elements in the second column (column 2A) of the periodic table. This group includes beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra). Alkaline earth metals have only two electrons in their outermost electron layer

The right answer is B

Why is the total mass always conserved in a chemical reaction? Be sure that your explanation includes the discussion of atoms and bonds.

Answers

Conservation of mass means that mass can not be created and even destroyed. This hold true with energy. During a chemical reaction, atoms were never created during the process. Also, during the process they were not destroyed. Atoms just change in form, connect to a different configuration or made into smaller or larger molecules but never created or destroyed.

Calculate the molar solubility of calcium hydroxide in a solution buffered at each of the following pH's. pH 5, pH 7, pH 10

Answers

Calcium hydroxide dissolves and dissociates according to:
Ca(OH)₂(s) ⇄ Ca²⁺(aq) + 2 OH⁻(aq) therefore the answer is PH7

Which substance is an example of an element?A) bronze
B) copper
C) methane
D) rust

Answers

Copper is an element. An element is a substance that is entirely made from one type of atom.

It is B. I took the test!!

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