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romanna [79]
2 years ago
15

Why is it important that a hypothesis be stated so that it can be modified?

Chemistry
1 answer:
ANEK [815]2 years ago
3 0
Because you need to know what you are looking for before actually trying something so you can prevent any accidents by doing stuff at random
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Periods on the periodic table represent elements ______.
hoa [83]

Answer:

B:with increase in number of valence electrons

Explanation:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

7 0
3 years ago
What is the concentration of a 0.750 l solution that contains 52.0 g of glucose (c6h12o6)?
vodka [1.7K]
Concentration of Solutions is oftenly expressed in Molarity. Molarity is the number of moles of solute dissolved per volume of solution.

                             Molarity  =  Moles / Volume
As,
      Moles  =  Mass / M.mass
So,
                             Molarity  =  Mass / M.mass × Volume   ---- (1)

Data Given;
                   Volume  =  0.750 L

                   Mass  =  52 g

                   M.mass  =  180 g/mol

Putting Values in eq.1,

                     Molarity  =  52 g ÷ (180 g.mol⁻¹ × 0.750 L)

                     Molarity  =  0.385 mol.L⁻¹
7 0
3 years ago
Which best describes a neutralization reaction?
Softa [21]
A reaction between to acids
3 0
3 years ago
Which of the following is the smallest volume? 500 mL 2,500 cm3 5.5 x 10-1 L 25 m3
Anni [7]
500 ml is the answer
6 0
3 years ago
The higher the pH, the less acidic the solution
marshall27 [118]

Answer:

<em>yh thats true lol, ty for that very interesting fact</em>

6 0
2 years ago
Read 2 more answers
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