CHEMISTRY HIGH SCHOOL

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Hi can someone help me with this question! First one - 1

Answers

Answer 1
Answer:

Answer:

Test 2

Explanation:

............................................
Answer 2
Answer:

Answer:

(B) Test 2

Explanation:

The entire substance changed, and turned into a liquid.

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Which property is true for metals
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When dissolved in water, an Arrhenius base yields(1) hydrogen ions (2) hydronium ions(3) hydroxide ions (4) oxide ions

Answers

Answer:

               Hydroxide Ions

Explanation:

                   Acid and Bases are defined according to three different theories and concepts.

                      A)  Arrhenius Concept

                      B) Lowry Bronsted Theory

                       C) Lewis Theory

According to Arrhenius Concept of Acid and Base, "Acid is any specie which when dissolved in water ionizes to produce H⁺ ions".

Examples:

                                  HNO₃   →    H⁺  +  NO₃⁻

                                  H₃PO₄    →    3 H⁺  +  PO₄³⁻

While, "Bases are those species which when dissolved in water produces Hydroxyl Ions (OH⁻)".

Examples:

                                  KOH    →  K⁺  +  OH⁻

                                  Ca(OH)₂    →     Ca²⁺  +  2 OH⁻

Final answer:

When an Arrhenius base dissolves in water, it yields hydroxide ions (OH-).

Explanation:

When an Arrhenius base is dissolved in water, it yields hydroxide ions, which have a chemical formula of OH-. The formula for an Arrhenius base is usually represented as BOH, where B represents a cation (positive ion) and OH- represents the hydroxide ion. Some examples of Arrhenius bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH).

Learn more about Arrhenius bases and hydroxide ions here:

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Identify the chiral carbon in amphetamine (benzedrine)

Answers

Chiral Carbon is a carbon atom that is attached to 4 different types of atoms or group of atoms

In Amphetamine, there is only 1 carbon that have 4 different types of atoms, so there is only 1 Chiral Carbon in it which have 2 optical isomers :

PhCH2CH(NH2)CH3

Which of the following is not part of daltons atomic theory

Answers

Different elements are composed of different atoms.

At higher elevations, the boiling point of water decreases, due to the decrease in atmospheric pressure. As a result, what conclusion could be drawn from the boiling egg?a.At higher elevations, it would take less time to hard boil an egg, because there is less atmospheric pressure.
b.
At higher elevations, it would take longer to hard boil an egg, because there is a lower boiling point, so the egg is boiling in water at a lower temperature.
c.
At higher elevations, it would take less time to hard boil an egg, because there is a lower boiling point. Therefore it would take less time to achieve the boiling point.
d.
At higher elevations, it would take longer to hard boil an egg, because it would take longer to achieve the boiling point.

Answers

I believe the correct response is A. At higher elevations it would take less time to hard boil an egg, because there is less atmospheric pressure.

He accepted value for the density of liquid mercury is 13.5336 g/mL. Four scientists measure the density of liquid mercury in their individual laboratories. The most accurate measurement is made by

Answers

Answer;

-The most accurate measurement is made by;

C. Dr. Smith, who measures 13.54 g/mL.

Explanation;

-The absolute density (how much a given volume of the substance weighs) of mercury is 13593 kilograms per cubic meter. It can also be stated as 13.56 g/cm^3. Accuracy measures the nearness of a calculation to the true value.

-In this case; the measurement by Dr. Smith is near the true value 13.56 g/cm^3, as compared to the measurements by other scientists.That is Dr. Chopra, who measures 13.487 g/mL. Dr. Thompson, who measures 13.5 g/mL. and Dr. Tyler, who measures 13.9336 g/mL.

The most accurate measurement is made by Dr. Smith. He measures this as 13.54 g/ml.

A substance with a definite shape and volume is a ___ phase of matter

Answers

Explanation:

Matter in which molecules have strong force of attraction are held tight together. Therefore, to break this force of attraction strong force is required.

This type of matter is know as solid. Also, it is known that solid substances have definite shape and volume.

Thus, we can conclude that a substance with a definite shape and volume is a  solid phase of matter.
I would say solid shape of matter.
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