1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GuDViN [60]
3 years ago
6

Earth has approximately 600,000,000 meters of coastline. If we assume this entire length of coastline has sandy beaches 60 meter

s wide and 20 meters deep, how many cubic meters of sand are on the beaches? Express your answer to the correct number of significant figures.
Chemistry
1 answer:
VashaNatasha [74]3 years ago
4 0

Answer:

7 and 11

Explanation:

The amount of sand on the beaches can be found using this formula:

volume (m3) = length (m) × width (m) × depth (m)

(6 × 108 m) × 60 m × 20 m = 7 × 1011 m3

Therefore, there would be a total of 7 × 1011 cubic meters of sand on the beaches.

You might be interested in
Use the exponential term in the Arrhenius equation to explain how temperature affects reaction rate.
WINSTONCH [101]

The Arrhenius equation describes the relation between the rate of reaction and temperature for many physical and chemical reactions

It is an expression that provides a relationship between the rate constant (of a chemical reaction), the absolute temperature.

The Arrhenius equation,

k = zpe^{\frac{- Ea}{RT} }, where

k is the rate constant,

z is the collision factor,

p is the steric factor,

Ea is the activation energy,

R = 8.3245 \frac{J}{mol. K} is the ideal gas constant, and,

T is the temperature.

The activation energy by definition, is the minimum energy (or threshold energy) required for two particles of reactants upon collision to form products.

The Arrhenius equation could also be written as:

⇒ k = Ae\frac{-Ea}{RT}, where

⇒ A = zp, the Arrhenius factor.

Taking the neutral logarithm of both parties, we get:

⇒ In k = \frac{-Ea}{RT}\frac{(1)}{(T)} + In A,

Assuming that, A is independent of temperature, when T is increased, the equilibrium constant k will also increase and therefore, the rate of the reaction will also increase.

To learn more about Arrhenius equation here

brainly.com/question/9786461

#SPJ4

6 0
2 years ago
An aqueous solution at 25°C has a OH− concentration of 1.9x10−8M . Calculate the H3O+ concentration. Be sure your answer has the
Papessa [141]

Answer:

= 5.26 × 10^-7 M

Explanation:

We know that;

[H3O+][OH-] = 1 x 10^-14

Therefore;

Given; OH− concentration = 1.9x10^−8 M

Then; [H3O+] = (1 x 10^-14)/[OH-]

                      = (1 x 10^-14)/(1.9x10^−8)

                      = 5.26 × 10^-7 M

4 0
3 years ago
Read 2 more answers
An ordered list of chemical substances is shown:
JulijaS [17]

Answer : The correct option is, (B) 2, 3 and 6.

Explanation :

Combustion reaction : It is a type of reaction where a hydrocarbon react with an oxygen molecule to give carbon dioxide, water as a product.

In general,

Hydrocarbon+O_2\rightarrow H_2O+CO_2

For example : Ethane react with oxygen to give carbon dioxide and water.

C_2H_8+4O_2\rightarrow 2CO_2+4H_2O

In the given list, O_2 is a reactant and CO_2,H_2O are the products.

Therefore, the correct answer is, (B) 2, 3, and 6

6 0
2 years ago
Which of the pairs of molecular structures shown below depict enantiomers (enantiomeric forms) of the same molecule?
Arisa [49]
Enantiomers is a type of structural isomerism. Two structures have the same chemical formula, but they differ in the arrangement of functional groups. The key characteristic of a pair of enantiomers is that, the two structures are mirror-images of each other. Example is the two isomers of 2-butanol shown in the picture.

7 0
3 years ago
Where does undigested food goes?
wolverine [178]

Answer:

After leaving the small intestines, the undigested food enters the colon ( large intestines)

Explanation:

When the chyme is exhausted of its nutrients, the remaining waste material changes into the semi solids called as feces. These pass into the large intestine, where gut flora further break residual proteins and starches.

Water is absorbed here and the remaining waste matter is stored prior to defecation.

The passage of the digesting food in the colon is a lot slower, taking about 12 to 50 hours until it is removed by defecation. The colon mainly serves as a site for the fermentation of digestible matter by the gut flora.

Colon is the largest part of the GI tract.

4 0
3 years ago
Read 2 more answers
Other questions:
  • In the reaction 3H2 + N2 → ____ NH3, what coefficient should be placed in front of NH3 to balance the reaction?
    11·1 answer
  • Example of false solutions and true solutions <br>​
    8·1 answer
  • The material the start all reactions are ______ and the materials that are formed are called _____.
    14·2 answers
  • 13._SeClo+ _02 → _SeO2 + _Cl2
    13·2 answers
  • Why is the wave energy lower when it reaches the receiver? (Hint: think about what you know about visible light.)
    5·2 answers
  • When we convert one metric unit to another the conversion factor is always exactly equal to 1. true or false
    12·1 answer
  • What is the difrense between soft water and hard water?
    9·1 answer
  • What is the voltage if the current is 10 amps and the resistance is 2 volts? How do I solve this?
    9·1 answer
  • Why do scientists define systems?
    13·2 answers
  • At which part of a river would you have the best luck growing food?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!