Name the following chemical compound. NaBra. sodium bromite
b. niobium bromite
c. sodium bromide
d. niobium bromide

Answer: Option (3) is the correct answer.

Explanation:

Gram formula mass or molar mass is the sum of mass of all the individual  atoms present in the compound or formula.

For example, gram formula mass of is calculated as follows.

                            = g/mol

                             = (14.00 + 4.00 + 35.45) g/mol

                             = 53.45 g/mol

                             = 53.5 g/mol (approx)

Thus, we can conclude that the gram formula mass of is 53.5 g/mol (approx)

The gram formula mass of NH₄Cl is 53.5 g/mol (3rd option)

How to determine the gram formula mass?

The gram formula mass of a compound is simply the molar mass of the compound.

The gram formula mass of NH₄Cl can be obtained as illustrated below:

• Molar mass of N = 14 g/mol
• Molar mass of H = 1 g/mol
• Molar mass of Cl = 35.5 g/mol
• Gram formula mass of NH₄Cl = ?

Gram formula mass of NH₄Cl= 14 + (4 × 1) + 35.5

= 14 + 4 + 35.5

= 53.5 g/mol

Thus, we can conclude that the gram formula mass of NH₄Cl is 53.5 g/mol (3rd option)

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Most metals are not liquid at room temperature. They are typically solid and have a crystalline structure. Therefore, the correct option is option 3.

Metals are known for their high thermal and electrical conductivity, as well as their malleability and ductility. These properties allow metals to be shaped into various forms, such as wires and sheets, and conduct heat and electricity efficiently.

However, the majority of metals have a solid state at room temperature, with exceptions such as mercury, which is a liquid metal. The solid nature of metals is due to the metallic bonding between atoms, which involves the sharing of electrons within a sea of delocalized electrons.

Thus, the ideal selection is option 3.

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The complete question is -

Most metals are NOT-

Ductile

good conductors of heat and electricity,

liquid at room temperature,

malleable.

Answer:

The answer to your question is below

Explanation:

Question 2.

Answer: The molar mass is found by taking 2 x the molar mass of K, plus 1 x the molar mass of sulfur, plus 4 x the molar mass of oxygen.

Question 3.

molar mass H₂O₂ = (1 x 2) + (16 x 2)

                             = 2 + 32

                             = 34.02 g

Use proportions to find the number of moles

                         34.02 g of H₂O₂ ----------------- 1 mol

                            4 g                    ------------------ x

                            x = (4 x 1)/34.02

                            x = 4/34.02

                            x = 0.1175 ≈ 0.118 moles              

Answer: 0.118 moles

Answer:

FALSE

Explanation:

Final answer:

The claim that ancient philosophers did not conduct experiments or detailed observations is false. Philosophers like Aristotle made extensive contributions to biology through observation, and Hellenistic scholars conducted early forms of experimental research.

Explanation:

The statement that ancient philosophers discussed the world around them but did not do any experiments or detailed observations is FALSE. While it is true that some ancient philosophers, particularly in the early stages of Greek philosophy, were more speculative in nature, others, such as Aristotle, engaged in detailed observations and can be considered early scientists. For example, Aristotle conducted extensive studies on biology, classifying a vast number of species and making observations on their life cycles, habits, and anatomy.

Throughout history, methodologies have varied, and while the ancient philosophers didn't conduct experiments in the modern sense, they did employ various forms of inquiry to understand the world. Furthermore, in the Hellenistic period, scholars at institutions like the Library of Alexandria did indeed conduct forms of research that could be seen as experimental, such as Eratosthenes estimating the Earth's circumference.

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