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zlopas [31]
2 years ago
7

*BRAINLIEST BRAINLIEST

Chemistry
1 answer:
Lena [83]2 years ago
8 0

Answer:

THE 3 third one

Explanation:

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0.03 mol of potassium nitrate, KNO3 dissolved in 1.2 dm3 distilled water. What is the solubility of potassium nitrate, KNO3 ?​
Rufina [12.5K]

Answer:

solubility=0.25mol/dm^3

Explanation:

number of moles of solute=0.03mol

volume of solution in dm³=1.2dm³

solubility=?

as we know that

solubility=\frac{number of moles of solute}{volume of solution indm}

solubility=\frac{0.03mol}{1.2dm^3}

solubility=0.25mol/dm^3

i hope this will help you :)

3 0
3 years ago
Which statement is true?
Setler79 [48]
The first statement is true because s<span>peed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. Speed has nothing to do with direction. On the other hand, velocity is a vector quantity because direction is needed for this. </span>
8 0
3 years ago
Read 2 more answers
Pls help ty so much!
Nitella [24]

\quad \huge \quad \quad \boxed{ \tt \:Answer }

\qquad \tt \rightarrow \:mass = 11.42 \:\: grams

____________________________________

\large \tt Solution  \: :

\qquad \tt \rightarrow \: Q = ms\Delta T

  • \textsf{Q = heat evolved/absorbed = 501 J}

  • \textsf{m = mass in gram = ?}

  • \textsf{s = specific heat = 0.45}

  • \textsf{ΔT = change in temp = 120 - 22.5 =97.5°C}

\large\textsf{Find m : }

\qquad \tt \rightarrow \: 501 = m \sdot(0.45) \sdot(97.5)

\qquad \tt \rightarrow \:  501 = m \sdot43.875

\qquad \tt \rightarrow \: m =  \dfrac{501}{43.875}

\qquad \tt \rightarrow \: m  \approx11.42 \:  \: g

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

4 0
1 year ago
Why is potassium nitrate classified as aj electrolyte?
baherus [9]
<span>KNO3 is a strong electrolyte because it completely dissociates into ions in water. Dissociates means it immediately breaks into ions of K+ (potassium cation) and NO3- (nitrate anion). Thus it also conducts electricity very well compared to a weak electrolyte.</span>
6 0
2 years ago
Read 2 more answers
Which of the following statements best describes the current atomic theory
Oksana_A [137]
You did not provide the statements but a possible answer might be that the current atomic theory is sound and that technology that could challenge it does not exist at this time. There is no way to change it because no research can be done about it.
8 0
3 years ago
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