A helium-filled weather balloon has a volume of 858 L at 15.9°C and 754 mmHg. It is released and rises to an altitude of 7.22 km, where the pressure is 361 mmHg and the temperature is –27.1°C. The volume of the balloon at this altitude in liters is ?

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Q: the foldi

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A: Concentration is the measure of how much of a given substance is mixed with another substance. 

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A: The structure is as follows:  

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Q: Chemistry Demonstrate 2 practical examples electrocoagulation, including redox half reactions.

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Q: Write the empirical formulas of the following compounds C2N2 NazS204 K2Cr2O7 C6H6

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A: Hydrogen bonding is defined as hydrogen bond between hydrogen atom and most electronegative atom.

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Q: From these observations Are alkali metals or alkali earth matal more reactive?

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Q: Increasing poarity Increasing length

A: When the double bond forms, the bond length decreases. 

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.