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2 years ago

Why is it important to be careful when walking on an icy sidewalk?

Chemistry

2 answers:

belka [17]2 years ago

6 0

Answer:

There is less friction on an icy surface.

Hope that helps.

Explanation:

Archy [21]2 years ago

4 0

Answer:

The is less friction on an icy surface

Explanation:

This is because when u walk on plain ground there is steady friction on the surface but when u walk on an icy floor these is barely any friction which is why it's hard to walk on.

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Why is subatomic particles not made up of atoms

OLEGan [10]

Because subatomic particles ARE what make up atoms.

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3 years ago

How many minutes are in 9,040 ms

aivan3 [116]

Answer:

0.15066667

I tried, hope this helps :)

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3 years ago

Identify if you should use millimeters, centimeters, meters, or kilometers to measure each example.

ira [324]

Answer:

1. unless you live right around the block, distance from home to school should be in kilometers.

2. centimeters

3. millimeters

4. meters (the average is about 2 meters)

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3 years ago

Read 2 more answers

The vapor pressure of benzene is 73.03 mm Hg at 25°C. How many grams of estrogen (estradiol), C18H24O2, a nonvolatile, nonelectr

alexira [117]

Answer:

14.9802 grams of estrogen must be added to 216.7 grams of benzene.

Explanation:

The relative lowering of vapor pressure of solution containing non volatile solute is equal to mole fraction of solute.

$\frac{p_o-p_s}{p_o}=\frac{n_2}{n_1+n_2}$

Where:

$p_o$ = Vapor pressure of pure solvent

$p_s$ = Vapor pressure of the solution

$n_1$ = Number of moles of solvent

$n_2$ = Number of moles of solute

$p_o = 73.03 mmHg$

$p_s= 71.61 mmHg$

$n_1=\frac{216.7 g}{78.12 g/mol}=2.7739 mol$

$\frac{73.03 mmHg-71.61 mmHg}{73.03 mmHg}=\frac{n_2}{2.7739 mol+n_2}$

$n_2=0.05499 mol$

Mass of 0.05499 moles of estrogen :

= 0.05499 mol × 272.4 g/mol = 14.9802 g

14.9802 grams of estrogen must be added to 216.7 grams of benzene.

6 0

3 years ago

How many moles are in 3.4 x 10^23 atoms of O2?

Tamiku [17]

Answer:

5.00 moles..hope it helps

7 0

3 years ago