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qaws [65]
3 years ago
7

What do scientists use to increase the surface area of a solute?

Chemistry
2 answers:
Tomtit [17]3 years ago
8 0

Answer:

Scientist increases the surface area of a solute by grinding the solute with a motor and pestle.  

Explanation:

Grinding of a solid solute exposes the reactant molecules to new surfaces. When the surface area increases it allows greater frequency of collision between the reactant particles. The reactant particles can now collide in proper orientation. The increase in surface area thus speeds up the rate of the reaction.

mojhsa [17]3 years ago
5 0
<span>use a mortar & pestle to grind the solute into smaller particles, thus increasing the surface area.</span>
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How many moles are in 5.0 x 1025 atoms of iron
Mnenie [13.5K]
1 mole --------------- 6.02 x 10²³ atoms
( moles iron) -------- 5.0 x 10²⁵ atoms

( moles iron ) = 5.0 x 10²⁵ x 1 / 6.02 x 10²³

moles iron = 5.0 x 10²⁵ / 6.02 x 10²³

= 83.05 moles of iron

hope this helps!
8 0
3 years ago
Which chemical is the limiting reagent for the entire series of reactions? Why?
Reptile [31]
I'm assuming that you are asking a general question because you did not include an example.

The limiting reagent is the item in the reactants (reagents) that will run out first. This is because it limits what the reaction can produce, essentially causing the leftover elements/compounds to just sit there.
3 0
4 years ago
Read 2 more answers
True or false: chemical reactions are usually written left to right
nika2105 [10]

Answer:

true. e.g

iron+water+oxygen->hydratedironoxide

8 0
2 years ago
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Dumbledore decides to gives a surprise demonstration. He starts with a hydrate of Na2CO3 which has a mass of 4.31 g before heati
vovikov84 [41]

Answer:

Na₂CO₃.2H₂O

Explanation:

For the hydrated compound, let us denote is by Na₂CO₃.xH₂O

The unknown is the value of x which is the amount of water of crystallisation.

Given values:

Starting mass of hydrate i.e Na₂CO₃.xH₂O = 4.31g

Mass after heating (Na₂CO₃) = 3.22g

Mass of the water of crystallisation = (4.31-3.22)g = 1.09g

To determine the integer x, we find the number of moles of the anhydrous Na₂CO₃ and that of the water of crystallisation:

        Number of moles  = \frac{mass }{molar mass }

Molar mass of Na₂CO₃ =[(23x2) + 12 + (16x3)]  = 106gmol⁻¹

Molar mass of H₂O = [(1x2) + (16)] = 18gmol⁻¹

Number of moles of Na₂CO₃ = \frac{3.22}{106} = 0.03mole

Number of moles of H₂O =  \frac{1.09}{18} = 0.06mole

From the obtained number of moles:

                          Na₂CO₃                               H₂O

                           0.03                                    0.06

Simplest

Ratio                  0.03/0.03                         0.03/0.06

                                 1                                      2

Therefore, x = 2    

7 0
3 years ago
Which organelle in cytoplasm is responsible for carrying hereditary information? ​
Amanda [17]

Answer:

Nucleus

Explanation:

The nucleus serves as the cells command center, sending direction to the cell to grow, mature, divide, or die

3 0
3 years ago
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