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ehidna [41]
2 years ago
5

Henry is in the community investigating sources of chemical energy for his science experiment. Select the best examples of chemi

cal energy Henry can use.
A gas station and people playing hopscotch
A squirrel eating acorns and a fire burning
Someone reading a book and eating a sandwich
Someone sliding down the slide and someone drinking water
Chemistry
2 answers:
djverab [1.8K]2 years ago
8 0
B it seems as a fire is better then the rest
Julli [10]2 years ago
6 0

Explanation:

Determine whether the following symbols are universal or contextual. In "The Nightingale and the Rose,"

Oscar Wilde uses a red rose as a symbol for love. In To Kill a Mockingbird, Harper Lee uses a mockingbird as a symbol for innocence.

In A Little Princess, Frances Hodgson Burnett uses hot buns as a symbol for the connection between the main character and a poor street child.

In "The Water of Life," the Brothers Grimm use water as a symbol for life.

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Explanation:

The answer is D, pitch.

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What is the formula for finding the density of<br> an object?
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The answer would be:
D = M/V

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M= mass
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Beth pushes a box with a force of 2 N to the left. Dave pushes the same box from the opposite side with a force of 8 N to the ri
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Suppose that 10.0 L of Carbon Dioxide gas are produced by this reaction, 4C3H5N3O9 -&gt; 12 CO2 + 10H2O + 6N2 +O2, at a temperat
siniylev [52]

The mass of nitroglycerin : 34.52 g

<h3>Further explanation</h3>

Reaction

4C₃H₅N₃O₉ ⇒ 12 CO₂ + 10H₂O + 6N₂ +O₂

Volume = 10 L

Temperature = -5°C=268 °K

Pressure = 1 atm

mol of CO₂ (ideal gas) :

\tt n=\dfrac{PV}{RT}\\\\n=\dfrac{1\times 10}{0.082\times 268}\\\\n=0.455

mol ratio C₃H₅N₃O₉ : mol CO₂= 4 : 12, so mol C₃H₅N₃O₉ :

\tt \dfrac{4}{12}\times 0.455=0.152

mass C₃H₅N₃O₉ (MW=227,0865 g/mol):

\tt 0.152\times 227.0865=\boxed{\bold{34.52~g}}

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2 years ago
Read the excerpt from Kennedy’s inaugural address. To those people in the huts and villages of half the globe struggling to brea
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an emotional appeal to emphasize the United States' commitment to justice

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