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Crazy boy [7]
3 years ago
5

Why do cars need a cooling system in conjunction with the engine?

Chemistry
1 answer:
stira [4]3 years ago
3 0
A.
___________________
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A piece of word has a mass of 3.16 g; when placed in 20.0 mL of water, the water volume increased to 23.4 mL. What is the densit
Elza [17]

Answer:

0.93g/mL

Explanation:

Given parameters

Mass of wood  = 3.16g

Initial volume of water  = 20mL

Volume of water + wood  = 23.4mL

Unknown:

Density of the wood  = ?

Solution:

Density is the mass per volume of a substance.

 It is mathematically expressed as;

       Density  = \frac{mass}{volume}

Volume of wood = 23.4mL  - 20mL = 3.4mL

So,

    Density = \frac{3.16}{3.4}   = 0.93g/mL

7 0
3 years ago
which moving body has no acceleration? a.a satilite orbiting at a constant speed b.a person rnning once around a track at a cons
RoseWind [281]
The answer is D. for sure i took the test  no acceleration means no turning going straight no turns  i hope i helped
8 0
3 years ago
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Predict which moon phase will occur about one week after a full moon?
andriy [413]

Answer:

waning gibbous I belive

Explanation:

6 0
4 years ago
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K + Cl2 --&gt;_KCI<br> -<br> a<br> 2,3<br> b<br> 32<br> С<br> 2,2<br> 1,2<br> d
Goryan [66]

Answer:

b 32

Explanation:

6 0
3 years ago
How many particles are in 1.40 x 10^7 mol of aluminum (Al)?
SpyIntel [72]

Answer:

<h3>Hlo there !! </h3>

<u>One mole of any substance contains 6.022*1023 structural units (atoms, molecules, ions, etc.). This number is known as the Avogadro constant.</u>

<u>One mole of any substance contains 6.022*1023 structural units (atoms, molecules, ions, etc.). This number is known as the Avogadro constant.So 1.04*107 mol of Al contains 1.40*107 * 6.022*1023 = 8.43*1030 structural units (in case of Al – atoms).</u>

<h3><u>8.43*1030 particles Al.</u></h3>

Explanation:

<h3>Hope this helps !!</h3>
5 0
2 years ago
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