What is the approximate mass of iron

A sample of Ar gas has a volume of 6.30 L with an unknown pressure. The gas has a volume of 8.57 L when the pressure is 2.74 atm, with no change in temperature or amount of gas. What was the initial pressure, in atmospheres, of the gas?

Where does anaerobic respiration take place in a cell

Suppose you take a piece of hard wax from an unlit candle. After you roll the wax between your fingers for a while, it becomes soft. What State of matter is the softer wax? Is it possible for wax to change without changing state

Calculate density of a rectangular solid, which has a mass of 25.71 g. It is 2.30 cm long, 4.01 cm wide and 1.82 cm high.

What is the molarity of a solution containing 20 grams of naoh in 500 milliliters of solution?

Which symbols would be included in the noble gas notation for an element that had valence electrons in the 5s subshell? Ar Kr Xe Rn

A sample of sulfur dioxide occupies a volume of 562 mL at 45.° C and 720 kPa. What volume will the sulfur dioxide occupy at STP?

Does a solution have to involve a liquid? Explain your answer

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How to prove that NaCl is homogeneous mixture.