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sleet_krkn [62]
3 years ago
14

Which of these terms best describes the following statement?

Chemistry
1 answer:
Xelga [282]3 years ago
5 0
Which of these terms best describes the following statement?"A solution of the unknown compound turned litmus paper blue" 
A. Hypothesis 
B. Model
C. Quantitative observations 
D. Qualitative observation- is the answer
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Perform the following mathematical operation and report the answer to the correct number of significant figures? ( I have watche
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This reaction appears to be destroying the logs
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The least active elements are the _______.
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Noble gases are the least<span> reactive </span>elements<span> in the periodic table because they have a full valence shell. Examples are, Argon, Neon, Xenon, and Helium</span>
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3 years ago
0.350 mol of a solid was dissolved in 260 mL of water at 21.2 oC. After the solid had fully dissolved, the final temperature of
Fittoniya [83]

Answer: Heat of the solution  = mass water × specific heat water × change in temperature

mass water = 260ml (1.00g/ml ) = 260g

specific heat of water = c(water) = 4.184J/ g°C

Heat change of water = final temperature - initial temperature

                                       = 26.5 - 21.2

                                        = 5.3 °C

H = 260 g ( 4.184J/g°C ) (5.3°C) = 5765J

Molar heat = \frac{5765J}{0.350mol}

                    = 16473J/mol

Explanation: finding molar heat requires first to look at  specific heat of water and the change of water temperature

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