14. Why does a sea breeze blow from the ocean toward the shore?

How much energy must be absorbed by 45.0g of water to increase its temperature from 83 0°C to 303.0°C?

mrs_skeptik [129]

Answer: There will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from $83.0^{o}C$ to $303.0^{o}C$ .

Explanation:

Given: Mass = 45.0 g

Initial temperature = $83.0^{o}C$

Final temperature = $303.0^{o}C$

Formula used to calculate heat energy is as follows.

$q = m \times C \times (T_{2} - T_{1})$

where,

q = heat energy

m = mass of substance

C = specific heat = $4.18 J/g^{o}C$ (here, for water)

$T_{1}$ = initial temperature

$T_{2}$ = final temperature

Substitute the values into above formula as follows.

$q = m \times C \times (T_{2} - T_{1})\\= 45.0 g \times 4.18 J/g^{o}C \times (303.0 - 83.0)^{o}C\\= 41382 J$

Thus, we can conclude that there will be 41382 J energy must be absorbed by 45.0g of water to increase its temperature from $83.0^{o}C$ to $303.0^{o}C$ .

8 0

3 years ago

Valence electrons will either ______________ or ______________ to form molecules.

Alja [10]

Answer:

ionic or covalent

Explanation:

The outermost electrons -- the valence electrons -- are able to interact with other atoms, and, depending on how those electrons interact with other the atoms, either an ionic or covalent bond is formed, and the atoms fuse together to form a molecule.

7 0

3 years ago

Read 2 more answers

Which reactant is limiting? Show work

fenix001 [56]

Answer:

1. Iodine is the limiting reactant

2. $6molAlI_3$

Explanation:

1. Balanced chemcial equation:

$2Al+3I_2\rightarrow 2AlI_3$

2. Theoretical mole ratio

It is the ratio of the coefficients of the reactants in the balanced chemical equation:

$\dfrac{2molAl}{3molI_2}$

3. Actual ratio

It is ratio of the moles available to reat:

$\dfrac{9molAl}{9molI_2}$

4. Comparison

$\dfrac{9molAl}{9molI_2}>\dfrac{2molAl}{3molI_2}$

Then, there are more aluminum available than what is needed to react with the 9 moles of iodine, meaning that the aluminum is in excess and the iodine will react completely, being the latter the limiting reactant.

Conclusion: iodine is the limiting reactant.

5. How much aluminum iodide will be produced?

Use the theoretical mole ratio of aluminum iodide to iodide:

$\dfrac{2molAlI_3}{3molI_2}\times 9molI_2=6molAlI_3\leftarrow answer$

5 0

3 years ago

In order for nuclear fusion to occur, the core of the sun must be hot enough to overcome the _________ of the nuclei. select one

andreyandreev [35.5K]

The answer is option a, that is " electromagnetic repulsions".
The sun generates energy by nuclear fusion, and converts a part of its mass into energy and nuclear fusion is the source of all energy that is released by the sun. The two things which are required for the process of nuclear fusion are high temperature and the high densities.

7 0

4 years ago

Which selection contains elements that are NOT all in the same group?

Volgvan

Answer:

Iron, copper , calcium

Explanation:

Iron , copper and calcium are present in three different groups.

Iron is present in group eight.

Copper is present in group eleven.

Calcium is present in group two.

Sodium , potassium and rubidium are present in same group i.e. group one. These are alkali metals.

Fluorine, chlorine and bromine are present in group seventeen. These are halogens.

Argon, Krypton and xenon are present in same group i.e, group eighteen. All are these noble gases.

4 0

3 years ago