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Stolb23 [73]
2 years ago
7

The reaction of charcoal (carbon) and oxygen is sped up by grinding the charcoal into a fine powder. This is an example of:

Chemistry
2 answers:
lilavasa [31]2 years ago
7 0

Answer:

D

Explanation:

Grinding to a powder increases the surface area of the charcoal .

matrenka [14]2 years ago
3 0

Answer:

ngl bro i think its All of the above.

Explanation:

Crushing it into a powder spreads its surface area, which then allows the temperature to spread out amongst the charcoal more easily, and now that the charcoal is in a more concentrated and less compact form, the reaction will spread out amongst the atoms much quicker.

Im sorry if I got you wrong

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andrezito [222]
Runoff (Hope this helped)
4 0
3 years ago
Density is the ratio of a sample's mass to its volume. A bar of lead has a mass of 115.2 g. When it is submerged in 25.0 mL of w
Margarita [4]

Answer:

$10.97 \ g/cm^3$

Explanation:

Given :

Mass of a bar of lead = 115.2 g

Initial water level $\text{in the graduated cylinder}$ = 25 mL

Final water level $\text{in the graduated cylinder}$ = 35.5 mL

Difference in the water level = 35.5 - 25

                                               = 10.5 mL

                                               = 10.5 \ cm^3

We know that when a body is submerged in water, it displaces its own volume of water.

Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL  = 10.5 \ cm^3

We know that mathematically, density is the ratio of mass of body to its volume.

Density of the lead bar is given by :

$\rho =\frac{\text{mass}}{\text{volume}}$

$\rho =\frac{\text{115.2 g}}{\text{10.5 cm}^3}$

  = $10.97 \ g/cm^3$

3 0
3 years ago
State three natural conditions under which plasmolysis could occur
S_A_V [24]

Answer:

  1. When the cell is placed in salt solution
  2. When leave celss dry
  3. When cells are placed in sugar solution

Explanation:

Hope this helps

4 0
2 years ago
The atomic number of magnesium is 12 this is also the number of which of the following
frozen [14]
The atomic number represents the number of protons present in an atom.Therefore,the answer is B.
4 0
3 years ago
WILL MARK BRAINLYEST
sergey [27]

Answer: V = 16.1 L

Explanation:Using Ideal gas law formula PV = nRT, we will derive for Volume. V = nRT / P

V = 0.34 mole ( 0.0820574 L.atm/ mole .K)(321 K ) / 0.5567 atm

= 16.1 L

7 0
3 years ago
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