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garik1379 [7]
3 years ago
14

If you hold your hand over a pot of boiling water, it feels hot. Explain how the boiling water is transferring heat to your hand

. Convection, because boiling water has enough energy to turn into water vapor, which rises through the air and transfers heat to your hand Conduction, because as the water boils, liquid water droplets splash out of the pot and hit your hand, transferring heat Radiation, because heat from the sun warms the top of your hand and that transfers to the water Radiation, because the heat energy moves from the pot to the air and from the air to your hand
Chemistry
2 answers:
scoray [572]3 years ago
5 0

Answer:

Convection, because boiling water has enough energy to turn into water vapour, which rises through the air and transfers heat to your hand.

Explanation:

When water boils, it forms hot water vapour (steam). The hot vapour is less dense than air, so it rises and carries its heat energy along. This process is called convection.

B is wrong. Unless the water is boiling quite vigorously, liquid water droplets do not splash out of the pot.

C is wrong. You may be indoors where the sun is not shining.

D is wrong. Radiant energy would move directly from the pot to your hand.

FinnZ [79.3K]3 years ago
3 0

Answer: by conduction, which is direct touch

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Answer:

In general, atomic radius decreases across a period and increases down a group. ... Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital. This results in a larger atomic radius.

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What is a solid formed from liquid reactions during a chemical reaction
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What mass of zinc (molar mass 65.4 g moll) does it take to produce 0.50 mole of H2(g)?
Hatshy [7]

Answer:

32.7 g of Zn

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Zn + 2HCl —> ZnCl₂ + H₂

From the balanced equation above,

1 mole of Zn reacted to produce 1 mole of H₂

Next, we shall determine the number of mole of Zn required to produce 0.5 mole of H₂. This can be obtained as follow:

From the balanced equation above,

1 mole of Zn reacted to produce 1 mole of H₂.

Therefore, 0.5 mole of Zn will also react to produce to 0.5 mole of H₂.

Thus, 0.5 mole of Zn is required.

Finally, we shall determine the mass of 0.5 mole of Zn. This can be obtained as follow:

Mole of Zn = 0.5 mole

Molar mass of Zn = 65.4 g/mol

Mass of Zn =?

Mass = mole × molar mass

Mass of Zn = 0.5 × 65.4

Mass of Zn = 32.7 g

Thus, 32.7 g of Zn is required to produce 0.5 mole of H₂.

4 0
2 years ago
In a redox reaction, how does the total number of electrons lost by the oxidized substance compare to the total number of electr
snow_lady [41]
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3 0
3 years ago
How many grams of aluminum oxide (Al2O3) will be formed from 10.0 grams of aluminum (Al)? 4 AL + 3 02 --> 2 AL203​
d1i1m1o1n [39]

Answer:

Mass = 18.9 g

Explanation:

Given data:

Mass of Al₂O₃ formed = ?

Mass of Al = 10.0 g

Solution:

Chemical equation:

4Al + 3O₂      →       2Al₂O₃

Number of moles of Al:

Number of moles = mass/molar mass

Number of moles = 10.0 g/ 27 g/mol

Number of moles = 0.37 mol

Now we will compare the moles of Al and Al₂O₃.

                      Al          :          Al₂O₃

                       4           :            2

                     0.37        :         2/4×0.37 = 0.185 mol

Mass of Al₂O₃:

Mass = number of moles × molar mass

Mass = 0.185 mol × 101.9 g/mol

Mass = 18.9 g

4 0
2 years ago
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