Oxygen can be generated in the laboratory by heating potassium chlorate until it decomposes. What mass of potassium chlorate must be used in order to generate 5.00 L of oxygen at STP? EQUATION: he pressure of a sample of helium in a 200. ml container is 2.0 atm. If the helium is mpressed to a volume of 10.0 ml without changing the temperature, what would be the essure of the oas2

Q: 7. Air is composed of approximately 78% N2, 21% O2 and 1% percent other gases. Calculate the density…

A: Given: The amount of nitrogenN2 present in the air is 78%, and that of oxygenO2 is 21%.  At standard…

Q: On a rainy day, a barometer reads 735 mmHg . Convert this value to atmospheres. Express your answer…

A: 1 atmosphere is equal to 760 mmHg. So to convert mmHg to atm, we need to divide mmHg value by 760.

Q: how many grams of aluminum reacted

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Q: whatvolume of oxuhem has measured at 27 degrees celsisu and .987 atm is produced from the decomp of…

A: The objective of this question is to find the volume of oxygen gas produced from the decomposition…

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Q: 1.22 L of oxygen was collected at 24oC and 0.985 atm. The sample was then heated to 54oC and the…

A:

Q: It is known that a container contains 4.8 moles of Argon and 1.7 moles of Oxygen . If the container…

A: Moles of argon = 4.8 moles  Moles of oxygen = 1.7 moles  Total moles of gases(n) = 4.8 + 1.7 = 6.5…

Q: When 15.0 g of fluorite (CaF₂) reacts with excess sulfuricacid, hydrogen fluoride gas is collected…

A: The number of moles of HF which is produced when CaF2 reacts with excess sulfuric acid is calculated…

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A: Balanced chemical equation: 2Na (s)  +   2H2O (l)  ------>   2NaOH (aq)   +   H2 (g) Number of…

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Q: A closed container in lab contains a sample of oxygen gas. When the temperature in lab is 15.6…

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Q: According to the following balanced chemical reaction: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) What…

A: Given, the balanced equation: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) Now, the number of moles of O2…

Q: Water can be broken down via electrolysis according to the reaction, 2 H2O (l) --> 2 H2 (g) + O2…

A:

Q: 5. A 1.000 g sample of an alloy containing only Mg and Al was reacted with dilute sulfuric acid and…

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Q: molar mass

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Q: The barometric pressure is 693 mm of Hg. What is the pressure expressed in atmospheres?

A: The coversion factor between atmospheric pressure and barometric pressure is given as:1 atm = 760 mm…

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A: From, Avogadro's law  We know that equal volumes of gases have an equal number of moles under the…

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Q: Worksheet #9 1- Calculate the pressure in atmospheres corresponding to a) 743.9 torr b) 125 mmHg

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A:

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.