The atomic mass unit (amu) isa. the mass of a single atom of carbon
b. one millionth of a gram
c. approximately the mass of a proton
d. approximately the mass of an electron

Answers

Answer 1

Answer: That would be c. approximately the mass of a proton

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fluorine is a toxic, reactive gas. which representation (structural formula, electron dot structure, or three-dimensional model) would you use to explain why fluorine is so reactive, why?

Answers

I think the correct answer is to use its electron dot structure. Fluorine is the most electronegative element among the halogens. It has 5 electrons in its 2p shell wherein it should have 6 electrons.

A sample of Ca(OH)2 is considered to be an Arrhenius base because it dissolves in water to yieldA. Ca2+ ions as the only positive ions in solution
B. H3O+ ions as the only positive ions in solution
C. OH– ions as the only negative ions in solution
D. H– ions as the only negative ions in solution

Answers

Answer : The correct option is, (C) $OH^-$ ions as the only negative ions in solution

Explanation :

According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion $(H^+)$ and a bases is a substance that ionizes in the water to give hydroxide ion $(OH^-)$ .

A sample of $Ca(OH)_2$ is considered to be an Arrhenius base because when it dissolves in the water to yield $OH^-$ ions as the only negative ions in solution.

Hence, the correct option is, (C)

The answer is C. Arrhenius bases increase the concentration of OH- in solution.

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:

Is a force created by the water that is displaced by an object.

Answers

Answer:

Buoyancy.

Explanation:

Buoyancy is a force created by the water that is displaced by an object. It is directly proportional to the amount of water that is being displaced by an object.

Hence, the greater the amount of water an object displaces; the greater is the force of buoyancy pushing the object up.

The buoyancy of an object is given by the formula;

$Fb = pgV\n\nBut, V = Ah\n\nHence, Fb = pgAh$

Where;

Fb = buoyant force of a liquid acting on an object.

g = acceleration due to gravity.

p = density of the liquid.

v = volume of the liquid displaced.

h = height of liquid (water) displaced by an object.

A = surface area of the floating object.

The unit of measurement for the buoyancy of an object is Newton (N).

Which lists the elements in order from least conductive to most conductive?A. nitrogen (N), antimony (Sb), bismuth (Bi)
B. nitrogen (N), bismuth (Bi), antimony (Sb)
C. antimony (Sb), nitrogen (N), bismuth (Bi)
D. bismuth (Bi), antimony (Sb), nitrogen (N)

Answers

Answer: Option (A) is the correct answer.

Explanation:

Nitrogen is a non-metal and it is known that non-metals do not conduct electricity. Thus, it will be least conductive out of the given options.

Whereas antimony (Sb) is a metalloid. Metalloid are the substance that show properties of both metals and non-metals. Thus, antimony will conduct electricity.

On the other hand, bismuth (Bi) is a metal hence, it will conduct electricity.

Thus, we can conclude that the order from least conductive to most conductive will be nitrogen (N), antimony (Sb), bismuth (Bi).

Answer: The correct answer is Option A.

Explanation:

Conductivity of an element is defined as the tendency to conduct electricity. This property is shown mostly by metals and then by some metalloids and least by non-metals.

Metals are defined as the elements which loose electrons easily and thus can easily conduct electricity due to the presence of free electrons.

Metalloids are defined as the elements which show the properties of both metals and non-metals. Some metalloids are conductive, some are not.

Non-metals are defined as the elements which gain electrons easily and thus cannot conduct electricity easily and are considered as non-conductive.

From the given options:

All the three elements belong to same group but nitrogen is a non-metal, antimony is a metalloid and Bismuth is a metal.

Thus, the order of conductivity follows:

$\text{Nitrogen }<\text{Antimony }<\text{ Bismuth }$