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2 years ago

Sound travels faster through solids than it does through either liquids or gases a student could verify this statement by

Chemistry

1 answer:

irina [24]2 years ago

4 0

Group of answer choices.

A. Distance that sound travels through a solid, a liquid, and a gas.

B. Pitch of sound when it passes through a solid, a liquid, and a gas.

C. Distance sound travels through a solid, a liquid, and a gas at varying temperatures.

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Answer:

D. Time required for sound to travel a set distance through a solid, a liquid, and a gas.

Explanation:

Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.

Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.

Mathematically, the time required for sound to travel is given by this formula;

$Time = \frac {distance (x)}{speed (v)}$

Hence, the time taken for sound to travel through each medium (solid, liquid and gas) would be measured, recorded and compared to one another.

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Answer:

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2 years ago

A gas has an initial volume of 168 cm3 at a temperature of 255 K and a pressure of 1.6 atm. The pressure of the gas decreases to

katen-ka-za [31]

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seropon [69]

Answer: oil spill, forest fire

Explanation:

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3 years ago

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Which statement is true of a chemical change?

Andru [333]

The appropriate answer is a. it involves a change in the molecular structure of the substance. A change in phase or state is referred to as a physical change. For example...liquid water freezing is a physical change because the state changes but solid water is still H20. Separating water into its constituent atoms, hydrogen and oxygen is a chemical change because the molecular structure of water is now non existent.

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3 years ago

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What mass of sodium chloride will be needed to produce 17kg of chlorine?<br> 2Na+2H2O=Cl2+2NaOH+H2.

disa [49]

Explanation:

Sodium is a silver-colored metal which is soft enough to cut with a knife. It is an extremely reactive metal, and is always found naturally in ionic compounds, not in its pure metallic form. Pure sodium metal reacts violently (and sometimes explosively) with water, producing sodium hydroxide, hydrogen gas, and heat:

2Na(s) + 2H2O(l) ——> 2NaOH(aq) + H2(g)

Chlorine is a poisonous, yellow-green gas, with a very sharp odor, and was used in gas warfare during World War I.

Sodium and chlorine react with each other, however, to produce a substance that is familiar to almost everyone in the world: sodium chloride, or table salt:

2Na(s) + Cl2(g) ——> 2NaCl(s)

It is easy to see why this reaction takes place so readily when we look at it on an atomic level: sodium has one electron in its outermost (valence) shell, while chlorine has seven electrons in its valence shell. When a sodium atom transfers an electron to a chlorine atom, forming a sodium cation (Na+) and a chloride anion (Cl-), both ions have complete valence shells, and are energetically more stable.

The reaction is extremely exothermic, producing a bright yellow light and a great deal of heat energy.

In the following demonstrations, a 2.5 liter bottle is filled with chlorine gas. A coating of sand on the bottom of the bottle absorbs some of the heat energy produced during the reaction, and prevents it from breaking. A small piece of freshly-cut metallic sodium is placed in the flask, and then a small amount of water is added, which reacts with the sodium and causes it to become hot. The hot sodium then reacts with the chlorine, producing a bright yellow light, a great deal of heat energy, and fumes of sodium chloride, which deposits on the walls of the bottle.

In the first video clip, the sodium flares up almost immediately upon reaction with the water, and "burns out" quickly. (Don't blink, or you'll miss it.) In the second, water is added twice, to produce one short flash, followed by a much longer one. (This reaction can also be done with molten sodium, but I've never been brave enough to try that.)

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3 years ago