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13y ago

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How many molecules are there in 450 grams of NaSO4?

To find the number of molecules in 450 grams of NaSO4, we first need to calculate the number of moles using the molar mass of NaSO4 (142.04 g/mol). Then, we can use Avogadro's number (6.022 x 10^23 molecules/mol) to find the number of molecules in the calculated moles.


How much is 55 gallons in pounds?

One gallon of water weighs approximately 8.34 pounds, so 55 gallons would weigh around 459.7 pounds.


If 828 mL of oxygen gas is collected at 25ºC and 458 mm Hg what is its volume at STP?

To find the volume of the oxygen gas at STP (standard temperature and pressure), you can use the combined gas law. First, convert 25ºC to Kelvin by adding 273, giving you 298 K. Then use the equation (P1V1)/T1 = (P2V2)/T2, where P1 = 458 mmHg, V1 = 828 mL, T1 = 298 K, P2 = 760 mmHg (STP pressure), T2 = 273 K (STP temperature). Solve for V2 to find the volume of the oxygen gas at STP.


How many grams in a 55 gallon drum?

Oh, dude, seriously? A 55-gallon drum is a unit of volume, not weight. It's like asking how many pounds are in a gallon of milk. You gotta be more specific, like asking how many pounds of water can fit in a 55-gallon drum or something. But hey, I can tell you there are approximately 208,197 grams in 55 gallons of water if you really wanna know.


What is hydrogen at freezing point?

At freezing point hydrogen is a liquid, equilibrated with its solid state of matter. Hydrogen: Melting point 14.01 K, -259.14 °C, -434.45 °F Boiling point 20.28 K, -252.87 °C, -423.17 °F