Why is hydrogen unique among the elements

Chemistry

1 answer:

liq [111]2 years ago

7 0

Special Properties of Hydrogen. Hydrogen is an element that forms a diatomic molecule

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A column is filled with four different liquids of different densities. A red liquid, a blue liquid, a green liquid, and a purple

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4. Blue, Red, Green, Purple

(Lowest densities on the top, highest densities on the bottom)

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A slender uniform rod 100.00 cm long is used as a meter stick. two parallel axes that are perpendicular to the rod are considere

kvv77 [185]

Refer to the diagram shown below.

The second axis is at the centroid of the rod.
The length of the rod is L = 100 cm = 1 m

The first axis is located at 20 cm = 0.2 m from the centroid.
Let m = the mass of the rod.

The moment of inertia about the centroid (the 2nd axis) is
$I_{g} = \frac{mL^{2}}{12} = (m \, kg) \frac{(1 \, m)^{2}}{12} = \frac{m}{12} \, kg-m^{2}$

According to the parallel axis theorem, the moment of inertia about the first axis is
$I_{1} = I_{g} + (m \, kg)(0.2 m)^{2} \\ I_{1} = \frac{m}{12}+ 0.04m = 0.1233m \, kg-m^{2}$

The ratio of the moment of inertia through the 2nd axis (centroid) to that through the 1st axis is
$\frac{I_{g}}{I_{1}} = \frac{0.0833m}{0.1233m} =0.6756$

Answer: 0.676

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When C3H8 burns completely inn excess of oxygen, the products formed are

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Answer:

C3H8 + 5O2 ====> 3CO2 + 4H20

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Which of the following is not an example of temperature abuse ?

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The following of what exactly?

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An experiment was conducted to see which metal pot would be better for cooking food quickly. The table below shows how quickly s

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Answer:

The term conclusion best illustrates the given statement.

Explanation:

Conclusion refers to a decision or judgment that can be acquired by reasoning. From the observation mentioned in the given table:

1. The steel, aluminum, and bronze took 27, 45 and 80 seconds to dissolve small section of wax, this signifies that more time will be needed by them to transfer heat to the food while cooking. Thus, food will take more time to cook in them.

2. Copper consumed less time, that is, 15 seconds to melt the section of wax than the other metal pots, which signifies that it is a good conductor of heat than the others. Thus, the copper pot would be good for cooking food briskly.

After evaluating the results and observations in an experiment, the conclusion was made that pots made of copper are best for cooking foods.

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