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Vera_Pavlovna [14]
3 years ago
5

HELP EM PLEASE

Chemistry
2 answers:
Aleks04 [339]3 years ago
4 0

Answer:

The answer is gravitational potential energy

san4es73 [151]3 years ago
3 0
Gravitational potential energy is the energy stored in an object relative to its position :)
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What is the ph of a solution of h2so4 that has [h3o ] = 5.45 × 10–5 m?
zmey [24]

The pH of a solution of sulphuric acid that has hydronium ion concentration is 4.26.

<h3>How do we calculate pH?</h3>

pH of any solution is define as the negative logarithm of the concentration of H⁺ ion present in any solution, i.e.

pH = -log[H⁺]

In the question, it is given that:

Concentration of hydronium ion or H⁺ ion = 5.45×10⁻⁵ M

So, pH will be:
pH = -log(5.45×10⁻⁵)

pH = -(-4.26)

pH = 4.26

Hence required pH is 4.26.

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brainly.com/question/172153

8 0
2 years ago
During a titration a student found that 20.0cm3 of sodium carbonate solution
vlada-n [284]

Answer: The concentration of Na_2CO_3 required is 0.349mol/dm^3

Explanation:

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

n_1 = basicity of HNO_3 = 1

M_1 = molarity of HNO_3 solution = 0.500 mol/dm^3

V_1 = volume of  HNO_3 solution = 27.9cm^3

n_2 = acidity of Na_2CO_3 = 2

M_1 = molarity of Na_2CO_3 solution =?

V_1 = volume of  Na_2CO_3 solution =  20.0cm^3  

Putting in the values we get:

1\times 0.500\times 27.9=2\times M_2\times 20.0

M_2=0.349mol/dm^3

Therefore, concentration of Na_2CO_3 required is 0.349mol/dm^3

4 0
3 years ago
Heat capacity is a measure of the heat required to
Anna007 [38]

Answer: Correct answer is D) Raise the temperature of 1 gram of a substance by 1 degree.

Explanation:

Heat capacity or thermal capacity is a physical property of matter, defined as the amount of heat to be supplied to a given mass of a material to produce a unit change in its temperature. This is rasi

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