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mafiozo [28]
3 years ago
6

Why it’s possible to walk through air but not a concrete wall

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
3 0

well you can't walk through the air but you can't walk through a concrete wall because all of the solid atoms holding it together

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Convert 15.2 moles of K to atoms of K.
choli [55]

Answer:

\boxed {\boxed {\sf 9.15*10^{24} \ atoms \ K}}

Explanation:

To convert atoms to moles, Avogadro's Number must be used: 6.022*10²³.

This tells us the amount of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case it is the atoms of potassium. We can create a ratio.

\frac {6.022*10^{23} \ atoms \ K }{ 1 \ mol \ K }

Multiply by the given number of moles: 15.2

15.2 \ mol \ K *\frac {6.022*10^{23} \ atoms \ K }{ 1 \ mol \ K }

The moles of potassium cancel.

15.2 *\frac {6.022*10^{23} \ atoms \ K }{ 1 }

The denominator of 1 can be ignored.

15.2 * {6.022*10^{23} \ atoms \ K }{

Multiply.

9.15344*10^{24} \ atoms \ K

The original measurement of moles has 3 significant figures, so our answer must have the same. For the number we calculated that is the hundredth place. The 3 in the thousandth place tells us to leave 5.

9.15*10^{24} \ atoms \ K

In 15.2 moles of potassium, there are <u>9.15*10²⁴ atoms of potassium.</u>

3 0
3 years ago
How are plate tectonics and the rock cycle connected
mote1985 [20]

Answer:

All igneous rocks the basis of the rock cycle are formed by plate tectonics. ... The heat from the mantle that fuels plate tectonics causes both igneous and sedimentary rocks to be turned into metamorphic rocks. The metamorphic rocks can be eroded into sedimentary rocks are remelted back into igneous.

Explanation:

8 0
2 years ago
Whay is life process? give any four example​
AlladinOne [14]

Answer:

The basic essential activities performed by an organism to withstand its life are called as life processes. These include nutrition, respiration, circulation, excretion and reproduction. Organisms obtain energy from food to perform these life processes which are essential for survival.

6 0
3 years ago
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Which metal would most likely have the highest melting point?
Anettt [7]

Answer:

tungsten

Explanation:

I hope it's helpful for you

4 0
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When acetic anhydride is dissolved in water, it forms acetic acid according to the balanced chemical reaction shown below. calcu
melisa1 [442]

2(CH3)2O3 + 2H2O   --->   4 CH3COOH  is the balanced equation.


6 0
3 years ago
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