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3 years ago

Why are pipes bursting in the in extremely cold weather?

Chemistry

1 answer:

avanturin [10]3 years ago

8 0

Water is the only common substance that when you freeze it, it's volume INCREASES.

When the pipe originally held the "all full" volume and the the water expanded, it put a tremendous amount of pressure on the pipe. Enough pressure and the pipe would burst.

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A compound is 70.0% iron and 30.0% oxygen. Its molecular mass is 479.1 g/mol. Determine the

Strike441 [17]

Answer:

$Fe_6O_9$

Explanation:

Hello there!

In this case, since these problems about formulas, firstly require the determination of the empirical formula, assuming that the given percentages are masses, we can calculate the moles and mole ratio of oxygen to iron as shown below:

$n_{Fe}=70/55.85=1.25\\\\n_O=30/16=1.875$

In such a way, by rounding to the first whole number we multiply by 8 and divide by 5 to obtain:

$Fe_{2}O_{3}$

Whose molar mass is 159.69 g/mol and the mole ratio of the molecular to the empirical formula is:

479.1/159.69=3

Therefore, the molecular formulais:

$Fe_6O_9$

Regards!

4 0

2 years ago

When 155 mL of water at 26 C is mixed with 75 mL of water at 85 C, what is the final temperature? (assume that no heat is releas

Ket [755]

Depends if it desolved with the water or not

6 0

3 years ago

A liquid is placed in a closed container and time passes until

mixas84 [53]

Answer: Dynamic equilibrium

Explanation:

3 0

2 years ago

What is the empirical formula of a compound consisting of 29.6% oxygen and 70.4% fluorine by mass?

Rainbow [258]

O1Fl2

1. Assume an 100g sample, so the percentage will stay the same

2. Covert each element into their molar mass
29.6/16.00=1.8 mols of O
70.4/19.00=3.7 mols of Fl

3. Divide both by the smallest value of mol
1.8/1.8=1 O
3.7/1.8=2 Fl

4. Write the empirical formula:
O1Fl2

3 0

3 years ago

Read 2 more answers

What happens when sodium metal is dropped in water

Juliette [100K]

when sodium metal is dropped in water, hydrogen gas in liberated due to extreme heat released as the reaction is exothermic, gas catches fire.

3 0

3 years ago