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AlexFokin [52]
2 years ago
14

Why do atmoic numbers increase from left to right across any given row of the periodic table

Chemistry
1 answer:
stira [4]2 years ago
4 0
They have increased number of protons which is the atomic number. 
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How to prepare 250.00 ml of approximately 1.0 m hcl solution from the 2.5 m hcl solutio?
kirill115 [55]

To solve this we use the equation, 

M1V1 = M2V2

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

2.5 M x V1 = 1.0 M x .250 L

<span>V1 = 0.10 L or 100 mL of the 2.5 M HCl solution is needed

Hope this helps.</span>
4 0
3 years ago
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What is an example of how enginers contrbiuted to society
SpyIntel [72]

Answer:

Engineers changed the world, such as building houses, bridges, and cars.

Please rate it the brainlist if this helped you and let me know if you have any questions, thanks

8 0
3 years ago
An ________ is the smallest unit of matter that cannot be broken down chemically into simpler substances.
elena-14-01-66 [18.8K]
The answer is atom because it cannot be broken down into small substances
3 0
3 years ago
What is the thermal energy needed to completely melt 9.60 mol of ice at 0.0 C
inysia [295]
The  thermal energy  needed to  completely  melt  9.60  mole  of ice  at  0.0 C  is    57.8   Kj

        Explanation
ice  melt  to  form   water

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4 0
3 years ago
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What substance takes part in an enzymatic reaction, but is unchanged by the reaction?
Ierofanga [76]
The answer to this question would be: enzyme 

<span>Enzyme is a kind of catalyst that </span>will take part in the chemical reaction but it won't be reacted. E<span>nzyme </span>only helps by reducing the energy needed to start the reaction.
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3 years ago
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