2. Calculate the mass of hydrogen formed when 25 grams of aluminum reacts with excess hydrochloric acid. 2A1 + 6HC1> Al2Cls + 3H2

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A: Additional comment: only thing to remember is 1m3 = 1000 L

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A:

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A: To find the inequalities for all the numbers that are within a distance of 3 units from the number…

Q: What is density and how is it calculated?

A: The mass of a unit volume of a substance is known as density.

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A: We have to compute given equation .

Q: For Questions Questions 1-4 r

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A:

Q: I can only have 2 significant digits make sure you are reading the full question.

A: The calculation is correct. The answer is to be rounded to 2 significant digits

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A: Given:  solve :       1.08 L - 0.765 L

Q: 55.09 AL Express your answer in moles to three significant Agures.

A: To calculate moles of Al in given mass , we would use molar mass of Al.

Q: 1. Define Volume in the space below.

A: Note:  According to our guidelines we are supposed to answer only one question.

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A:

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A: Half reaction -  Is either the oxidation or reduction reaction component of the a redox reaction.

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A:

Q: the answer would need to be in ml form is it still the same number?

A: The relationship between cm3 and mL is  1 cm3 = 1 mL

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A: Answer:Density of an object is the ratio of its mass and volume as shown below:Here:

Q: the format of the answer is still incorrect, please give me the answer in decimal form .

A:

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Q: The directions say: Do the following calculations and use the correct number of significant figures…

A: Counting of significant figures is important while doing the calculations.

Q: I need the inverse of each volumes  Volume 1:  10.0 nm Volume 2:  6.0 nm Volume 3:  14.4 nm…

A: 1) Raciprocal of 10.0 nm     = 1/10.0    =0.100 nm-1 2) Raciprocal of 6.0 nm   = 1/6.0   =0.1667…

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.