When an iron nail is ground into powder, its mass ____.

Chemistry

1 answer:

Gre4nikov [31]3 years ago

3 0

Explanation:

(a) The mass of an object remains the same always. It is independent of its location. In this case, an iron nail is ground into powder. It means that its mass will remain unchanged. Hence, (a) is the correct option.

(b) Whenever there is a change of color of an object, a chemical reaction occurs. It shows that a reaction happens there. In this problem, a paper turns yellow-brown upon exposure to sunlight. A chemical reaction takes place there. Hence, (b) is the correct option.

You might be interested in

Why there are different branches of chemistry

fredd [130]

The 5 branches are organic, inorganic, biochemistry, analytical, and physical. There are different branches because they each apply to different parts of chemistry. For example organic chemistry is the study of carbon compounds and inorganic chemistry is the study of non carbon compounds. You can't just have one type of chemistry because these are very different.

5 0

3 years ago

Heat flow is the ________of energy from a waemer object to a cooler one. whats the blank??

Romashka-Z-Leto [24]

Answer:

transfer

Explanation:

as heat flows from one object to another, the first object loses the heat(energy), while the second object gains heat(energy).

If you have any questions don't hesitate to ask :)

8 0

3 years ago

In which of the following cases will the LEAST time be required to arrive at equilibrium? K below refers to the equilibrium cons

mylen [45]

Answer: Option (4) is the correct answer.

Explanation:

It is known that equilibrium constant is represented as follows for any general reaction.

$A + B \rightarrow C + D$

K = $\frac{[C][D]}{[A][B]}$

As equilibrium constant is directly proportional to the concentration of products so more is the value of equilibrium constant more will be the number of products formed.

As a result, more is the time taken by the reaction to reach towards equilibrium. Whereas smaller is the value of equilibrium constant more rapidly it will reach towards the equilibrium.

Thus, we can conclude that cases where K is a very small number will require the LEAST time to arrive at equilibrium.

8 0

3 years ago

The chemical symbol for sodium is

serg [7]

Sodium- Na
most active element- Fluorine
lightest element- Hydrogen

7 0

3 years ago

Why is granite better then marble for a statue in a city centre

nasty-shy [4]

Granite is stronger, and it doesn't grow mold in the rain. It also looks better than marble and is easier to carve.

5 0

3 years ago

Read 2 more answers