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Juli2301 [7.4K]
3 years ago
7

How does the density of ice compare with that of liquid water? What evidence can you cite to support your answer?

Chemistry
1 answer:
SpyIntel [72]3 years ago
6 0

Answer: Ice is less dense than water.

Explanation: As water freezes, it expands, making it less dense. This is why ice cubes float in a glass of water.

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During a laboratory experiment, 36.12 grams of Aboz was formed when O2 reacted with aluminum metal at 280.0 K and 1.4 atm. What
kvv77 [185]

Answer:

8.70 liters

Explanation:

  • 3O₂+ 4Al → 2AI₂O₃

First we <u>convert 36.12 g of AI₂O₃ into moles</u>, using its <em>molar mass</em>:

  • 36.12 g ÷ 101.96 g/mol = 0.354 mol AI₂O₃

Then we <u>convert AI₂O₃ moles into O₂ moles</u>, using the stoichiometric coefficients of the reaction:

  • 0.354 mol AI₂O₃ * \frac{3molO_2}{2molAl_2O_3} = 0.531 mol O₂

We can now use the <em>PV=nRT equation</em> to <u>calculate the volume</u>, V:

  • 1.4 atm * V = 0.531 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 280.0 K
  • V = 8.708 L
5 0
3 years ago
A man is 72 inches tall, what is his height in meters? round to three significant figures.​
Artist 52 [7]

Answer:

1.829 meters is the answer

Explanation:

5 0
3 years ago
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What atomic or hybrid orbitals make up the pi bond between the C1 And C2 in tetrafluoroethylene, C2F4? How many sigma bonds does
schepotkina [342]
C1 has 3 sigma bonds and 1 pi bond.
3 0
3 years ago
HNO3 + H2SO4 + NO
77julia77 [94]

Explanation:

The two half equations are;

3e + HNO3 → NO

S→ H2SO4 + 6e

When balancing half equations, we have to make sure the number of electrons gained is equal to the number of electrons lost.

<em>Which factor will you use for the top equation?</em>

We multiply by 2 to make the number of electrons =  6e

<em>Which factor will you use for the bottom equation?</em>

We multiply by 1 to make the number of electrons = 6e

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2 years ago
What are the constituents of baking powder?
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Baking powder is a mixture of baking soda and a mild edible acid such as tartaric acid
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3 years ago
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