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schepotkina [342]
3 years ago
9

Differences between hypothesis and theory​

Chemistry
2 answers:
Sphinxa [80]3 years ago
7 0

Answer:

A hypothesis is either a suggested explanation for an observable phenomenon, or a reasoned prediction of a possible causal correlation among multiple phenomena. In science, a theory is a tested, well-substantiated, unifying explanation for a set of verified, proven factors.

Explanation:

He I hope this helps and hope I can brainliest answer

grin007 [14]3 years ago
7 0

Answer:

A theory is supported by evidence.

A hypothesis is made before any research has been done.

Explanation:

i dont know how many differences you need let me know if you need more

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A 0.199 M weak acid solution has a pH of 3.99. Find Ka for the acid.
Alex17521 [72]

Answer:

Ka = ( About ) 5 x 10^ - 8

Explanation:

Let us first identify the dissociation equation for this weak acid,

HA ⇌ ( H+ ) + A¯

Knowing this, we can tell what the equilibrium expression is, respectively,

Ka = ( [ H+ ] [ A¯ ] ) / [ HA ]

_________________________________________________

Now let us use the given pH 3.99 to calculate [ H+ ], knowing that pH = −log [H+],

3.99 = - log[H+],

[H+] = 10 ^ - 3.99,

[H+] = ( About ) 1 * 10^-4 M

Substitute known values into the equilibrium expression,

Ka = [( 1 x 10^ - 4 ) ( 1 x 10^ ¯4 )] / 0.199,

Ka = ( About ) 5 x 10^ - 8

3 0
3 years ago
What volume of a 6.67 M NaCl solution contains 3.12 mol NaCl? L
harkovskaia [24]

Answer:

0.47dm³

Explanation

Given parameters :

Molarity of NaCl = 6.67M

Number of moles = 3.12mol

Volume of NaCl =?

Volume of NaCl = number of moles/Molarity

Volume of NaCl = 3.12mol/6.67M

Volume of NaCl = 0.47dm³

4 0
4 years ago
Read 2 more answers
The initial pressure of a mixture of C6H6 and an excess of H2 in a rigid vessel is 1.21 atm. A catalyst is introduced. After the
KengaRu [80]

Answer:

mole fraction of C6H6 = 0.613 atm

Explanation:

The equation for this reaction is :

          C_6H_6 _{(g)} + 3H_2_{(g)} \to C_6H_{12}_{(g)}

Initial      P₁            P₂             0

Final        0           P₂ -P₁/2      P₁

After completion of the reaction;

P₁  +  P₂  = 1.21 atm                    ----- (1)

P₂  -  P₁/2 +  P₁ = 0.839 atm

P₂ + P₁/2 = 0.839 atm          ----- (2)

Subtracting (2) from (1); we have:

P₁/2 = 0.371

P₁ = 0.742 atm

From(1)

P₁  +  P₂  = 1.21 atm

0.742 atm + P₂  = 1.21 atm

P₂  = 1.21 atm - 0.742 atm

P₂  = 0.468 atm

Thus, the partial pressure of C6H6 = 0.742 atm

∴

Partial pressure = Total pressure × mole fraction of C6H6

mole fraction of C6H6 = Partial pressure /  Total pressure

mole fraction of C6H6 = 0.742 atm / 1.21 atm

mole fraction of C6H6 = 0.613 atm

5 0
3 years ago
Help plz this is science but i dont see that option
Artist 52 [7]

Answer:

Sorry if this is late but your answer is in the picture below,

Explanation:

If those boxes are touching they would transfer the same amount of heat and coolness that would evenly distribute the temperature.

Hence, the answer is the one on the very right top corner.

6 0
3 years ago
Explain what domain would best be represented by the "?" in the diagram.
Mice21 [21]

Answer:A

Explanation:

7 0
3 years ago
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