CHEMISTRY HIGH SCHOOL

Which of these is NOT a physical property of matter?A)
odor
B)
boiling point
C)
melting point
D)
ability to rust

Answers

Answer 1
Answer: It would be the ability to rust because matter takes up space.
Answer 2
Answer:

Final answer:

The ability to rust is not a physical property of matter, but a chemical one, reflecting a substance's capacity to react with oxygen to form a new substance.

Explanation:

In the list provided, the ability to rust is NOT a physical property of matter. Physical properties include traits that can be observed or measured without changing the composition of the material. Examples include melting point, boiling point, odor, and density. The ability to rust, however, is a chemical property as it indicates a substance's ability to react with oxygen to form a new substance, which involves a change in composition.

Learn more about Physical and Chemical Properties here:

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Regardless of how it is prepared or where a sample is collected from, water is always composed of 88.8% oxygen and 11.2% hydrogen by mass. this is an illustration of the

Answers

Answer:- Law of definite proportions.

Explanations:- The chemical composition of a compound is always constant means it contains the same elements in exactly same proportions by mass. This is called "Law of definite proportions."

Molecular formula of water is H_2O . It has two hydrogen atoms and one oxygen atom. Atomic mass of H is 1.008 and that of oxygen atom is 15.999.

Molar mass of water = 2(1.008) + 15.999 = 18.015

mass percentage of H = ((2.016)/(18.015))100  = 11.2%

mass percentage of O = ((15.999)/(18.015))100  = 88.8%

These percentages are always fix, no matter from where the sample of water is collected.

Can the absolute energy states of the reactants (E1) and products (E2) be measured in a chemical reaction?

Answers

no it can not the absolute energy states of the reactants (E1) and products (E2) be measured in a chemical reaction
hope it helps

Answer:

No we cannot measure absolute energy states.

Explanation:

The absolute energy state means the internal energy of any molecule, either reactant or product. We cannot measure the internal energy of any reactant or product as internal energy or absolute energy is sum of all kind of energy including kinetic energy, vibration energy etc.

However we can measure the changes in these energy during any chemical process.

Why is tin foil a good insulator

Answers

Tin foil is a heat insulator because it can reflect radiation. When tin foil, for instance, is wrapped around an object, air can be trapped. Trapped air is a good insulator against convection.

How many grams of aluminum chloride are needed to react completely with 1.084g lithium sulfide?

Answers

Molar mass :

Li₂S = 45.947 g/mol

AlCl₃ = 133.34 g/mol

3 Li₂S + 2 AlCl₃ = 6 LiCl + Al₂S₃

3 * 45.947 g Li₂S ----------> 2 * 133.34 g AlCl₃
1.084 g Li₂S ----------------> ?

Mass Li₂S = 1.084 * 2 * 133.34 / 3 * 45.947

Mass Li₂S = 289.08112 / 137.841

Mass Li₂S = 2.0972 g 

hope this helps!

Help me pleaseeee!!!

Answers

Answer:

The bars and the gymnast's hands

Hope This Helps!

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The temperature of a sample of water changes from 10°C to 20°C when the water absorbs 100 calories of heat. What is the mass of the sample?

Answers

Answer:

10 g

Explanation:

Right from the start, just by inspecting the values given, you can say that the answer will be  

10 g

.

Now, here's what that is the case.

As you know, a substance's specific heat tells you how much heat is needed to increase the temperature of  

1 g

of that substance by  

1

∘

C

.

Water has a specific heat of approximately  

4.18

J

g

∘

C

. This tells you that in order to increase the temperature of  

1 g

of water by  

1

∘

C

, you need to provide  

4.18 J

of heat.

Now, how much heat would be required to increase the temperature of  

1 g

of water by  

10

∘

C

?

Well, you'd need  

4.18 J

to increase it by  

1

∘

C

, another  

4.18 J

to increase it by another  

1

∘

C

, and so on. This means that you'd need

4.18 J

×

10

=

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

.

Now look at the value given to you. If you need  

41.8 J

to increase the temperature of  

1 g

of water by  

10

∘

C

, what mass of water would require  

10

times as much heat to increase its temperature by  

10

∘

C

?

1 g

×

10

=

10 g

And that's your answer.

Mathematically, you can calculate this by using the equation

q

=

m

⋅

c

⋅

Δ

T

 

, where

q

- heat absorbed/lost

m

- the mass of the sample

c

- the specific heat of the substance

Δ

T

- the change in temperature, defined as final temperature minus initial temperature

Plug in your values to get

418

J

=

m

⋅

4.18

J

g

∘

C

⋅

(

20

−

10

)

∘

C

m

=

418

4.18

⋅

10

=

10 g
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