The halogen gas with a mass less than 15 is fluorine (F). It has an Atomic Mass of approximately 19.00 u, but if considering only the halogen gases, it is the lightest halogen. Fluorine is a pale yellow gas at room temperature and is highly reactive, particularly with alkali and alkaline earth metals.
carbon dioxide
At $3 per gallon you can buy slightly less than 6 gallons with $17.85.
gas chromatography mass selective detector
That all depends on the type of gas and volume given for the problem. We can't determine the mass and density of the gas cylinder if we are not given these info, which can also include pressure (because density varies based on that variable).
To calculate the density of carbon monoxide (CO) gas, you need to know its molar mass, which is approximately 28.01 g/mol. Density (ρ) can be calculated using the formula ρ = mass/volume. If you have the volume of CO gas in milliliters (ml), you can convert it to liters (1 ml = 0.001 L) and then use the ideal gas law or the molar volume at standard temperature and pressure (STP) to find the mass. Once you have the mass, divide it by the volume in liters to find the density in g/L.
Fluorine, at 19 atomic mass units, is the only halogen gas that fits that requirement.
No halogen gas has a mass of under 15 atomic mass units. The closest is fluorine, at 19.0 atomic mass units.
The element with a mass number of 19 could be fluorine, which is a halogen and a gas, but not a noble gas.
The noble gas with 48 neutrons and a mass of less than 100 is Krypton. It has an atomic number of 36, which means it has 36 protons in its nucleus. The total mass of Krypton is slightly less than 100 atomic mass units.
Helium
Halogen gas is in a Tungsten-Halogen Light Bulb.
Halogen.
A block of wood is heavier than gas because the wood has more mass and density compared to the gas molecules which are spread out in the container. The atoms and molecules in the gas have less mass and are flying around with more space between them, making the gas less dense and lighter than a solid block of wood.
Saturn is a planet made out of mostly gas. As gas has little mass, it is less dense than Earth. Remember that density is proportional to its mass and surface area.
Halogen is a gas, so your question doesn't make much sense. If you're asking about a halogen (light) bulb, then the answer is: mainly halogen.
Chlorine gas is more reactive than hydrogen gas. Chlorine is a halogen and has a stronger tendency to gain electrons during a reaction, making it more reactive. Hydrogen, on the other hand, is more stable and less likely to undergo chemical reactions.
If gas bubbles escape the volumetric flask, the calculated molar mass of the gas will be less than the theoretical molecular value. This is because the number of moles of gas remaining in the flask will be underestimated, leading to a lower molar mass calculation.