CHEMISTRY HIGH SCHOOL

Which two physical properties allow a mixture to be separated by chromatography?(1) hardness and boiling point
(2) density and specific heat capacity
(3) malleability and thermal conductivity
(4) solubility and molecular polarity

Answers

Answer 1
Answer:

Answer:

The correct option is: (4) solubility and molecular polarity

Explanation:

Chromatography is an analytical technique which is used for the separation of various components in a given mixture.

In this process, the mixture to be separated is first dissolved in the mobile phase, which carries it through the stationary phase, thus leading to separation of the various components.

This differential separation is the result of the differential migration which is based upon the solubility and polarity of the individual components of of the given mixture.
Answer 2
Answer:  solubility and molecular polarity 

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The electron configuration 1sÆ 2sÆ2pÒ 3sÆ3pÒ represents which noble gas?

Answers

This noble gas is argon (Ar), because its third energy level is full.

Which of the following chemical agents is used for sterilization? a. chlorine b. ethylene oxide c. soap d. phenolics e. alcohol

Answers

Answer:

Ethyleneoxideisthechemicalagentsusedforsterilization.

Final answer:

Ethylene oxide is the chemical agent used for sterilization amongst those listed in the question. This gas sterilizes by disrupting the DNA of microorganisms. Other agents listed, such as chlorine, alcohol and phenolics are generally considered disinfectants, not sterilants.

Explanation:

Out of the chemical agents listed, ethylene oxide is the one commonly used for sterilization. Ethylene oxide is a gas that sterilizes by penetrating and disrupting the DNA of microorganisms, preventing them from reproducing. It is frequently used to sterilize medical and laboratory equipment, particularly items that cannot be sterilized by high heat such as plastic, electrical equipment, and delicate instruments.

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Learn more about Chemical Sterilization here:

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Which substance yields H+(aq)as the only positive ion in an aqueous solution

Answers

According to the Bronsted-Lowry Theory, that is an Acid.

PLEASE HELP ME!!! AAHH IM TRAPPED

Answers

what exactly do you need help with?Your question is quite open ended.

Answer:

you got out?

Explanation:

Which statement is true about an empirical formula?1. It is the true ratio of atoms in a formula unit.
2. It is the simplest ratio of atoms in a formula unit.
3. It represents the true molecular mass of a chemical formula.
4. It represents the highest ratio of coefficients in a chemical formula.

Answers

The statement that is true about an empirical formula is it is the simplest ratio of atoms in a formula unit. The answer is number 2. The rest of the statements do not answer the question above.

Answer:

2. It is the simplest ratio of atoms in a formula unit.

Explanation:

The empirical formula refers to how to provide the minimum proportion in which chemical elements combine into one substance. Sometimes it may happen that the minimum formula is equal to the molecular formula of the compound; However, this is not always true.  In short, the empirical formula refers to the simplest ratio of atoms in a unit of formula.

For example, the empirical or minimal formula of water is H2O, indicating that there is a 2: 1 ratio between the elements that make up water molecules. And, coincidentally, this is also the molecular formula of water.

What is the density of a substance with a mass of 1.8 kg and a volume of 0.2 L? Hurry Quick for 10 points
giveaway

Answers

Answer:

The answer is 9.0 kg/L

Explanation:

The density of a substance can be found by using the formula

density = (mass)/(volume) \n

From the question

mass = 1.8 kg

volume = 0.2 L

We have

density = (1.8)/(0.2) \n

We have the final answer as

9.0 kg/L

Hope this helps you

Answer:

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Explanation:
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