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3 years ago

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What is the volume of helium in a birthday balloon if the pressure inside the balloon is 1.15atm,the temperature is 25 degrees C

elsius, and the balloon holds 0.050 mol of helium

1 answer:

Rudiy273 years ago

6 0

Hijsjsjsnjduuehbdjcudjbebxjis12=*]^/4

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A compound in a copper ore has the following percentage composition by mass:

AveGali [126]

1) since we are given percentages, we can assume we have 100 grams of the molecule.

55.6 % Cu ----> 55.6 grams Cu
16.4 % Fe------> 16.4 grams Fe
28.0% S--------> 28.0 grams S

2) convert each gram to moles using the molar masses given

$55.6 g Cu \frac{1 mol}{63.5 g} = 0.876 mol Cu$
$16.4 g Fe \frac{1 mol}{56.0 g} = 0.293 mol Fe$
$28.0 gS \frac{1 mol}{32.0} = 0.875 mol S$

3) we divide the smallest value of moles (0.293) to each one.

Cu --> 0.876 / 0.293= 3
Fe---> 0.293 / 0.293= 1
S-----> 0.875 / 0.293= 3

4) let's write the empirical formula

Cu₃FeS₃

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3 years ago

Why is citric acid added to food? to add color to add tartness to add bitterness to add sweetness

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which of the following is not a postulate or assumption of the kinetic molecular theory? select the correct answer below: pressu

Alinara [238K]

The right response to the preceding question is: "Repulsive forces on each other or the container walls, both of which are postulates."

The Kinetic Molecular Theory's five fundamental tenets are as follows:

1. The molecules that make up gases are constantly moving, moving straight forward, and only changing direction when they clash with other molecules or the walls of a container.

2. The gas's constituent molecules are minuscule in comparison to the spaces between them.

3. Molecules in a gas collide with the container walls to exert pressure on the walls of the container.

4. Since gas molecules are not attracted to or repelled by the container walls, their collisions are not caused by these forces.

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