All categories

2 years ago

A kernel of popcorn contains a small amount of water and when heated the popcorn pops. How can you explain this to someone

1 answer:

4 0

When you put a popcorn kernel in a microwave, the microwave heats up the water. The water then evaporates, and the air wants to escape. There will be so much pressure that the skin/shell of the kernel will break, exposing the corn.

You might be interested in

How many sig figs 18.01528

Ulleksa [173]

Answer:7

Explanation:

5 0

3 years ago

A flask holds 3.01 x 1023 molecules of carbon dioxide. The container is holding ________

sammy [17]

(B), because 1.0 moles would be 6.02 x 10^23 molecules. So you have half a mole.<span>
</span>

8 0

3 years ago

As student used a pen to draw a line across a piece of chromatography paper. he then placed a sample of dye on the drawn line fo

AleksAgata [21]

Answer is in the photo. I can only upload it to a file hosting service. link below!

tinyurl.com/wpazsebu

3 0

2 years ago

g When copper(II) chloride and sodium carbonate solutions are combined, solid copper(II) carbonate precipitates, leaving a solut

Elden [556K]

Answer:

When copper(II) chloride and sodium carbonate solutions are combined, solid copper(II) carbonate precipitates, leaving a solution of sodium chloride. Write the conventional equation, total ionic equation, and net ionic equation for this reaction.

Explanation:

The word equation for the reaction is:

Copper (II) chloride(aq) + sodium carbonate (aq) ->sodium chloride (aq) + copper carbonate(s)

The balanced chemical equation of the reaction is:

$CuCl_2(aq)+Na_2CO_3(aq)->2NaCl(aq)+CuCO_3(s)$

The complete ionic equation is:

$Cu^2+(aq)+2Cl^-(aq)+2Na^+(aq)+CO_3^2^-(aq)->2Cl^-(aq)+2Na^+(aq)+CuCO_3(s)\\$

The net ionic equation is obtained from the complete ionic equation after removing the spectator ions:

$Cu^2^+(aq)+CO_3^2^-(aq)->CuCO_3(s)$

5 0

2 years ago

Explain what Happens at the saturation point when adding salt to water at room temperature.

lorasvet [3.4K]

Answer:

See below

Step-by-step explanation:

You won't see much happening. The solution is saturated, so the salt will fall to the bottom of the container and sit there. It will not dissolve.

However, at the atomic level, Na⁺ and Cl⁻ ions are being pulled from the surface of the crystals and going into solution as hydrated ions. At other places, Na⁺ and Cl⁻ ions are returning to the surface of the crystals.

The process is

NaCl(s) ⇌ Na⁺(aq) + Cl⁻(aq)

The rates of the forward and reverse processes are equal, so you see no net change.

6 0

3 years ago