Chemistry, 15.05.2021 07:20, unruhlsY25
N unknown mass of each substance, initially at 25.0 ∘C∘C, absorbs 1940 JJ of heat. The final temperature is recorded. Find the mass of each substance.
a. Pyrex glass (Final temp= 55.6 ∘C)
Express your answer using two significant figures.
b. sand (Final temp= 62.3 ∘C)
Express your answer using two significant figures.
Answers: 3
Chemistry, 22.06.2019 23:30, sanociahnoel
The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point
Answers: 1
Chemistry, 23.06.2019 11:20, bobthebattlebot
The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.
Answers: 1
N unknown mass of each substance, initially at 25.0 ∘C∘C, absorbs 1940 JJ of heat. The final tempera...
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