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4 years ago

Which of the following statements is true about the specific heat capacity of a substance?

Chemistry

1 answer:

Ludmilka [50]4 years ago

6 0

Answer:

Option A

Explanation:

An intensive property is a bulk property, meaning that it is a local physical property of a system that does not depend on the system size or the amount of material in the system. Examples of intensive properties include temperature, T; refractive index, n; density, ρ; and hardness of an object,specific heat, η.

Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, specific heat and many others.

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Consider the calculation of the pressure in kilopascals exerted by 1.25 g of nitrogen gas in a flask of volume 250 mL (0.250 dm3

Harrizon [31]

The amount of the nitrogen gas, N₂ molecules present is 2.68×10²² molecules

<h3>Avogadro's hypothesis </h3>

1 mole of N₂ = 6.02×10²³ molecules

<h3>How to determine the mole of N₂</h3>

We'll begin by calculating the number of mole of N₂. This can be obtained as follow:

Mass of N₂ = 1.25 g
Molar mass of N₂ = 28.02 g/mol
Mole of N₂ =?

Mole = mass / molar mass

Mole of N₂ = 1.25 / 28.02

Mole of N₂ = 0.0446 mole

<h3>How to determine the molecules of N₂ present</h3>

From Avogadro's hypothesis,

1 mole of N₂ = 6.02×10²³ molecules

Therefore,

0.0446 mole N₂ = 0.0446 × 6.02×10²³

0.0446 mole N₂ = 2.68×10²² molecules

Thus, the molecules of N₂ present is 2.68×10²² molecules

Learn more about Avogadro's number:

brainly.com/question/26141731

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6 0

2 years ago

A cell created by cloning is genetically A identical to its parent. B identical to its stem cell. C unique because it is a mixtu

stiks02 [169]

Answer: Identical to its parent.

Explanation:

The cloning can be defined as the process by which genetically identical individuals of an organism is produced either artificially or naturally.

The cloning in case of biotechnology refers to the creating the clones of organisms or copies of cells or DNA of the parent cell that is being used in the process.

The parent cell is cloned and numerous copies is made just like that of the asexual reproduction in the nature.

Example: Dolly the sheep.

8 0

3 years ago

How many lone pairs are in SO4 2-

s344n2d4d5 [400]

Answer:

None

Explanation:

There are two S=O. bonds and two S-O bonds in sulfate ion lewis structure. Sulfur atom is the center atom and four oxygen atoms are located around sulfur atom. There are no lone pairs in the last shell of sulfur atom.

7 0

3 years ago

How many grams of calcium carbonate were used if you drew the periodic table on the sidewalk using

german

Based on the data provided, there are 25 g of calcium carbonate in 1.505 × 10^23 atoms.

<h3>What is the moles of calcium carbonate in 1.505 × 10^23 atoms of calcium carbonate?</h3>

The mole of a substance can be calculated as follows:

Moles of substance = number of particles/6.02 × 10^23

Moles of calcium carbonate = 1.505 × 10^23/6.02 × 10^23

Moles of calcium carbonate = 0.25 moles

The mass of calcium carbonate in 0.25 moles is calculated as follows:

mass = moles × molar mass

molar mass of a calcium carbonate = 100 g/mol

mass of calcium carbonate = 0.25 × 100 = 25 g.

Therefore, there are 25 g of calcium carbonate in 1.505 × 10^23 atoms.

Learn more about molar mass and mass at: brainly.com/question/15476873

8 0

2 years ago

The map below shows areas on Earth that show evidence of once have glaciers.

never [62]

Yes it is C. Plate tectonics have little to no coo riparian with glaciers and global temperatures.

3 0

3 years ago

Read 2 more answers