What derived unit is usually used to express the density of liquids?

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Answer 1

Answer: Density refers to the measure of how much of the substance occupies a given volume at a given pressure and temperature
grams per milliliter or g/ml is the derived unit that is usually used to express the density of liquids.
In measuring the mass of a liquid, they use grams or kilograms, and uses liter, milliliters and cubic centimeters to measure the volume.
There are a lot of measuring tool that has been produced in the market. Like measuring cup, volume glassware commonly used in the laboratory.

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#1: Which of the following is an exothermic reaction? A. dissolving ammonium nitrate in water to cool the water B. condensation C. melting ice D. dissolving sugar in water. #2: Two objects (A and B) of the same temperature are in contact with each other. Which of the following statements is true? A. Heat transfers from object B to object A, because molecules from B collide with those from A. B. Heat transfers from object A to object B, because molecules from A collide with those from B. C. Although the molecules collide, no heat transfers because there is no temperature difference between the objects. D. No heat transfers, because there are no collisions between the molecules of the objects. #3: Which of the following parameters is kept constant in a coffee-cup calorimeter? A. temperature B. volume C. pressure D. kinetic energy #4: What type of substance would be best for use in a heating system? A. a liquid with a high specific heat B. a solid with a high specific heat C. a liquid with a low specific heat D. a gas with a low specific heat. #5: The reaction 2 NO(g) → N2(g) + O2(g) has a ΔH = -180.5 kJ. How much heat will be required to produce 44.8 L of NO by the reverse reaction? A. 644 kJ B. 180.5 kJ C. 301 kJ D. 322.3 kJ

Answers

These are the following answers to the five questions:
(1) (B) condensation. Condensation is exothermic, but it's not a reaction, it's a physical change.
(2) (C) Although the molecules collide, no heat transfers because there is no temperature difference between the objects.
(3) (C) pressure
(4) (A) a liquid with a high specific heat
(5) Supposing the NO is measured at STP:
(44.8 L) / (22.4 L/mol) x (180.5 kJ / 2 mol NO) = (B) 180.5 J

(1) (B) condensation. Condensation is exothermic, but it's not a reaction, it's a physical change.

(2) (C) Although the molecules collide, no heat transfers because there is no temperature difference between the objects.

(3) (C) pressure

(4) (A) a liquid with a high specific heat

(5) Supposing the NO is measured at STP:

(44.8 L) / (22.4 L/mol) x (180.5 kJ / 2 mol NO) = (B) 180.5 J

A cell created by cloning is genetically A identical to its parent. B identical to its stem cell. C unique because it is a mixture of DNA. D half like its father and half like its mother.

Answers

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.

A cell created by cloning is genetically identical to its parent. The correct answer is option A.

DNA (deoxyribonucleic acid) is a molecule that carries genetic information and instructions for the development and function of all living organisms.

When a cell is cloned, it is essentially a copy of the original cell. This means that the genetic material in the cloned cell is identical to the genetic material in the original cell.

The DNA in the cloned cell is exactly the same as the DNA in the parent cell, and there is no mixing or recombination of DNA from different sources.

In conclusion, the correct answer is A) identical to its parent. A cell created by cloning is genetically identical to its parent.

Learn more about DNA here:

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Earth’s layers are determined by their physical properties and chemical composition. In the lesson, you learned about each of Earth’s layers, what the layers are made of, and why they are important to the Earth. In the space below, write about how the atmosphere may be classified. Would it be part of the lithosphere, or a separate layer? Explain your answer.

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Answer:

The Atmosphere Is a separate layer And Also could be classified as the Closest layer

Explanation:

which of the following is not a mixture? a)antibiotic b)evaporated milk c)brewed coffee d)hydrogen chloride

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Answer:

d) Hydrogen chloride

Explanation:

Hydrogen chloride (HCl) is not a mixture. It is a chemical compound composed of two elements, hydrogen (H) and chlorine (Cl), combined in a fixed ratio. In contrast, the other options (antibiotic, evaporated milk, brewed coffee) all involve mixtures:

Antibiotics are typically mixtures of various chemical compounds used for medicinal purposes.

Evaporated milk is a mixture of milk and water with the water removed.

Brewed coffee is a mixture of water and coffee grounds, often with other components like sugar or cream added.

Hydrogen chloride, on the other hand, is a pure compound with a defined chemical formula (HCl) and consistent composition.

Which of the following types of radiation can be shielded by piece of paper or fabric

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There are 3 major types of radiation. The Alpha, Beta and Gamma radiation. It is the Alpha radiation that can be stopped by a piece of paper or fabric. Beta on the other hand can be stopped by plastic or a thin sheet of metal and Gamma by a piece of aluminum foil or lead.

Why is it incorrect to balance a chemical equation by changing the subscripts?

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