All categories

3 years ago

Water molecules on aluminum foil is an example of ____. a density b. freezing c. cohesion d. adhesion

Chemistry

1 answer:

hodyreva [135]3 years ago

3 0

D. adhesion because it is the intermolecular force attraction between different compounds.

You might be interested in

Which of the following is not an example of a molecule

brilliants [131]

C is the correct answer

6 0

3 years ago

Wind turbines are becoming an increasingly popular method of generating a community’s electricity. In wind turbines, wind is use

Tema [17]

The will not affect the wind. When it is windy the wind turns a turbine. Once the wind has gone through the turbine it is just normal wind, none of the wind is lost when this happened

4 0

3 years ago

Read 2 more answers

Based on the methods used to separate the substance into its parts, is Substance U a compound?

dmitriy555 [2]

Answer: The answer is A

Explanation: No because it’s is a mixture because physical methods were used to separate its particals

3 0

3 years ago

How many grams of propane are in 20 pounds of propane? Use the conversion 1 lb = 454 g. (Express your answers for the next three

Dima020 [189]

Answer:

a. $=9.1x10^3gC_3H_8$

b. $2.1x10^2molC_3H_8$

c. $Q=-4.6x10^5kJ$

Explanation:

Hello,

a. By applying the given information, one obtains:

$20lbC_3H_8*\frac{454gC_3H_8}{1lbC_3H_8} =9.1x10^3gC_3H_8$

b. By knowing that the propane has a molecular mass of 44g/mol, one obtains:

$20lbC_3H_8*\frac{454gC_3H_8}{1lbC_3H_8}*\frac{1molC_3H_8}{44gC_3H_8} =2.1x10^2molC_3H_8$

c. Here, the propane's combustion chemical reaction is stated:

$C_3H_8+5O_2-->3CO_2+4H_2O$

This enthalpy of reaction is computed via:

Δ $rH=(3*-393.5kJ/mol)+(4*241kJ/mol)-(-104.7kJ/mol)=-2043kJ/mol$

Finally, since it is done for 20 lb of propane ( $2.1x10^2molC_3H_8$ ), the obtainable energy is:

$Q=-2043kJ/mol*2.1x10^2molC_3H_8\\Q=-4.6x10^5kJ$

Best regards.

4 0

3 years ago

Consider the type of plant in which edible spoons and other disposable spoons would be produced. What systems would have to be i

Amiraneli [1.4K]

The plants are on the edible spoons

4 0

3 years ago