living organisms all contain fats that are called .... protiens, lipids, carbohydrates, nucleic acids?

The elements that have the most similar chemical properties are .

Further Explanation:

Periodic table:

Elements are arranged in increasing order of their atomic numbers in various rows and columns. Such tabular arrangement is called a periodic table. The elements with the same chemical and physical properties lie in the same group. Horizontal rows are called periods and vertical columns are called groups. There are 18 groups and 7 periods in a periodic table.

Elements are also classified as metals, non-metals, and metalloids in this table. The elements placed at the left side of the table are metals while those placed at the right of the table are non-metals. Metalloids are elements that are placed between metals and non-metals.

Magnesium, strontium, and barium belong to group 2A of the periodic table. These have two valence electrons in their outermost shell. So these three elements have similar chemical properties. But the other given elements do not lie in same group so they have different chemical properties.

Therefore option B is the correct answer.

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Answer details:

Grade: High School

Subject: Chemistry

Chapter: Periodic classification of elements

Keywords: magnesium, strontium, barium, Mg, Ba, Sr, periodic table, elements, group, period, chemical properties, similar.

Chemical properties are characteristics of a substance that describe how it interacts or reacts with other substances, leading to changes in its composition or structure. The correct answer is C. N₂, O₂, and F₂.

These properties help define the chemical behavior of a substance and are determined by its chemical composition and atomic/molecular structure.

N₂ (nitrogen gas), O₂ (oxygen gas), and F₂ (fluorine gas) belong to the same group/family on the periodic table, known as group 16 or the oxygen family. Elements within the same group tend to have similar chemical properties because they have the same number of valence electrons, which are the electrons involved in chemical bonding.

In the case of N₂, O₂, and F₂, they all have six valence electrons. This similarity in electron configuration leads to comparable chemical behavior, including their tendency to form covalent bonds, their reactivity, and their ability to gain electrons to achieve a stable octet.

Therefore, the correct answer is C. N₂, O₂, and F₂.

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C₂H8 is Dimethocain-M. In C₂H₈ two atoms of carbon are present. Combustion of 6.40 mole C₂H₈ produced 12.8 moles of CO₂.                            

What is combustion ?

Combustion reaction refers to burning of compound in presence of oxygen. The reaction is accompanied by heat and light. One mole of burned carbon produced one mole of CO₂ gas.

Combustion is a chemical reaction between substances ,usually  including oxygen and usually accomplished by the generation of heat and light.

Here we see that in C₂H₈ there are there are two carbons present then 2 moles of CO₂ gas is produced i.e. 2 × 6.40 = 12.8 moles.

Hence, 12.8 moles of CO₂ produced in combustion of 6.40 mole  C₂H₈.

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Answer:

4.88 kg

Explanation:

Amount of energy generated in 1 hour of exercise = 5500 kJ

Thus,

Amount of energy generated in 2 hours of exercise = 5500*2 kJ

So,

Amount of energy generated in 2 hours of exercise = 11000 kJ

Heat of vaporization of water = 40.6 kJ/mol

40.6 kJ of energy is required to vaporize 1 mole of water

Also,

11000 kJ of energy is required to vaporize (1/40.6) * 11000 mole of water

Moles of water = 270.936 moles

Molar mass of water = 18 g/mol

Mass = Moles * Molar mass = 270.936 * 18 g = 4876.8473 g

Also,

1 g = 0.001 kg

So, mass of water = 4.88 kg

Answer: Compounds having the same empirical formula are:

Explanation:

Empirical formula tells us about the proportion of the elements present in the compound but it do not tells us about the actual numbers of atoms of the elements present in the compound.

In given empirical formula that is proportion of  C:H:O = 1:2:1

In the proportion of C:H:O =2:4:2= 1:2:1

In the proportion of C:H:O =3:6:3= 1:2:1

In the proportion of C:H:O =1:2:2= 1:2:2

In the proportion of C:H:O =5:10:5= 1:2:1

In the proportion of C:H:O =6:12:6= 1:2:1

Compounds having the given empirical formula are:

The chemical compounds that have the empirical formula are:

A.C2H4O2

B.C3H6O3

D.C5H10O5

E.C6H12O6

An empirical formula can be defined as a formula that gives the smallest and simplest whole number ratio of the atoms of a chemical element found in a chemical compound.

The simplest whole number ratio of the atoms of   is:

= 1:2:1

• 1 atom of carbon.

• 2 atoms of hydrogen molecule.

• 1 atom of oxygen.

For :

= 2:4:2 = 1:2:1

For :

= 3:6:3 = 1:2:1.

For :

= 1:2:2 = 1:1:1  (Incorrect)

For :

= 5:10:5 = 1:2:1

For :

= 6:12:6 = 1:2:1

Note:

• C is the chemical symbol of carbon.

• H is the chemical symbol of hydrogen.

• O is the chemical symbol of oxygen.

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