All categories

3 years ago

Explain why a coin is able float on top of the water

Chemistry

2 answers:

arsen [322]3 years ago

7 0

Because of the surface tention.

ASHA 777 [7]3 years ago

5 0

Answer:

Surface tension is the result of water molecules pulling inward with a strong attractive force. This attractive force brings the molecules on the surface of the water close together and causes the surface of the water to be drawn toward the water molecules beneath the surface. Since there are no water molecules above the surface, there are uneven forces. This causes surface tension, allowing the coin to float on the water’s surface.

Explanation:

Sample response :D

You might be interested in

Which causes genetic variations and can result in different alleles?

erastova [34]

Answer:B random mutations

Explanation: Because I took the test

8 0

3 years ago

Read 2 more answers

Why should pyrotechnicians worry about the yield of the reactants in a firework? How does the yield affect the firework and the

dybincka [34]

The colors emitted by fireworks are products of chemical reactions. These products can be harmful to the environment, that's why, in other countries, it is prohibited to use fireworks, unless during New Year or Christmas. For example, blue fireworks from copper release cancerous dioxins, green sparks come from barium which is radioactive,etc.

3 0

3 years ago

Read 2 more answers

Which of the following is the correct set-up for the problem: How many grams of water will be produced from 3.2 moles of oxygen

suter [353]

Option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

<h3>Reaction between oxygen and ethene</h3>

Ethene (C2H4) burns in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O) along with the evolution of heat and light.

C₂H₄ + 3O₂ ----- > 2CO₂ + 2H₂O

from the equation above;

3 moles of O₂ ---------> 2(18 g) of water

3.5 moles of O₂ ----------> x

$x = 3.2 \times [\frac{2 \ moles \ H_2O}{3 \ moles \ O_2} ] \times[ \frac{18.02 \ g \ H_2O}{1 \ mole \ H_2O} ]$

Thus, option C is the correct set of the problem for mass of water produced by 3.2 moles of oxygen and an excess ethene.

Learn more about reaction of ethene here: brainly.com/question/4282233

#SPJ1

6 0

2 years ago

What’s the balance of this

lukranit [14]

It's the balance of chemical equation.

5 0

3 years ago

What is the best description of how heat is transferred from deep in the earth to the surface?

Lana71 [14]

Answer:

pretty sure it's C,

Explanation:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. ... This hot added material cools down by conduction and convection of heat.

3 0

3 years ago

Read 2 more answers