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zmey [24]
3 years ago
6

Why Mike the helium balloons float while the others rest on the table

Chemistry
1 answer:
svetlana [45]3 years ago
4 0

Helium is a chemical element of the atomic number 2, an inert gas that is the lightest member of the noble gas series.


These means, Helium is lighter than air, and for this is why all other balloons may not float.


The helium balloon displaces an amount of air (Just like an empty water bottle displaces an amount of water). As long as the weight of the helium plus the balloon fabric is lighter than the air displaces, the balloon will float in the air.

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Calculate the density of an object whose mass is 352 grams and has a volume of 469 mL please show work
mixer [17]

Answer:

<h2>0.75 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{352}{469}  \\  = 0.750533..

We have the final answer as

<h3>0.75 g/mL</h3>

Hope this helps you

4 0
2 years ago
Given the following equation: 8Fe+S8=8FeS
maxonik [38]

Answer:

a. 2954g of FeS

b. 1143g of FeS

Explanation:

Based on the reaction:

8 Fe + S₈ → 8 FeS

<em>8 moles of Fe reacts with 1 mole of S₈ to produce 8 moles of FeS</em>

<em />

a. 4.2mol sulfur produce:

4.2mol S₈ × ( 8 mol FeS / 1 mol S₈) = <em>33.6mol FeS</em>. As molar mass of FeS is 87.92g/mol, mass is:

33.6mol FeS × ( 87.92g / 1 mol FeS) = <em>2954g of FeS</em>

<em />

b. 13mol Fe produce:

13mol Fe × ( 8 mol FeS / 8 mol Fe) = <em>13mol FeS</em>. In mass:

13 mol FeS × ( 87.92g / 1 mol FeS) = <em>1143g of FeS</em>

5 0
3 years ago
Identify and describe the different forms of precipitation shown in the images.
zloy xaker [14]

Answer:

Sleet and hail, sleet are tiny drops of water that freeze when it rains. Hail forms when a thunderstorm lifts a water droplet above the freezing level.

Explanation:

8 0
2 years ago
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7 0
3 years ago
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