Air is a mixture. Air is a mixture of different air molecules such as nitrogen, oxygen, carbon dioxide, and so on.
I hope this helps. Let me know if anything is unclear.
<u>Answer:</u> The given sample of water is not safe for drinking.
<u>Explanation:</u>
We are given:
Concentration of fluorine in water recommended = 4.00 ppm
ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.
To calculate the ppm of fluorine in water, we use the equation:
Both the masses are in grams.
We are given:
Mass of fluorine = 
(Conversion factor: 1 g = 1000 mg)
Mass of water = 5.00 g
Putting values in above equation, we get:
As, the calculated concentration is greater than the recommended concentration. So, the given sample of water is not safe for drinking.
Hence, the given sample of water is not safe for drinking.
Answer: Gas
Explanation: The gas particles have big distances between them. Solid – In a solid, the attractive forces keep the particles together tightly enough so that the particles do not move past each other. Their vibration is related to their kinetic energy. In the solid the particles vibrate in place.
Answer:
-195.8 °C = 77.35 K = -320.44 °F
Explanation:
Temperature is commonly measured in following three scales;
1) Kelvin
2) Fahrenheit<span>
3) </span>Celsius<span>
Other scales are Rankine, Romer, Newton, Delisle e.t.c
Temperature given is -195.8 </span>°C. Degree Celsius is related to Kelvin and Fahrenheit as follow,
Celcius to Kelvin;
K = °C + 273.15
So,
K = -195.8 + 273.15
K = 77.35
Celcius to Fahrenheit;
°F = °C × 9/5 + 32
So,
°F = -195.8 × 9/5 + 32
°F = -320.44
Answer:
False
Explanation:
That's because elements in a compound combine and become an entirely different substance with its own unique properties.
