I have been a high school science teacher for 14 years. I have taught Integrated Physics and Chemistry, Biology, Chemistry, Food Science, and various test preparation courses. I am familiar with online learning and using various platforms for education. I have a Bachelor of Science in Biology and a Masters in Public Health, both from New Mexico State University. I believe that to help students learn, we must provide succinct examples for them so that they can learn the basic process and then apply that to problems that are not as straight forward.
Examine the heating curve for water in Section 12.7 (Figure 12.33$) .$Explain why the curve has two segments in which heat is added to thewater but the temperature does not rise.
Examine the heating curve for water in Section 12.7 (Figure 12.33$) .$Explain the significance of the slopes of each of the three rising segments. Why are the slopes different?
Determine the kinds of intermolecular forces that are present in each element or compound.a. $\mathrm{N}_{2}$b. $\mathrm{NH}_{3}$c. $\mathrm{CO}$d. $\mathrm{CCl}_{4}$
Determine the kinds of intermolecular forces that are present in each element or compound.a. Krb. $\mathrm{NCl}_{3}$c. $\mathrm{SiH}_{4}$d. $\mathrm{HF}$
Determine the kinds of intermolecular forces that are present in each element or compound.a. HClb. $\mathrm{H}_{2} \mathrm{O}$c. $\mathrm{Br}_{2}$d. $\mathrm{He}$
Determine the kinds of intermolecular forces that are present in each element or compound.a. $\mathrm{PH}_{3}$b. $\mathrm{HBr}$c. $\mathrm{CH}_{3} \mathrm{OH}$d. $\mathrm{I}_{2}$
Task 1:Without looking at the periodic table, give the group, period, and block in which the element with electron configuration [Rn] 7s1 is located.Without looking at the periodic table, give the group, period, and block in which the element [He] 2s2 is located.How does the reactivity of the element described in (a) compare with the reactivity of the element with electron configuration [He] 2s1? Clarify the reason.
Task 2:Without looking at the periodic table, identify the group, period, and block in which the element that has the electron configuration [Xe] 6s2 is located.Without looking at the periodic table, write the electron configuration for the Group 1 element in the third period.Is the element likely to be more reactive or less reactive than the element described in part (a)? And why?
When hydrogen sulfide gas is bubbled into a solution of sodium hydroxide, the reaction forms sodium sulfide and water. How many grams of sodium sulfide are formed if 1.25 $\mathrm{g}$ of hydrogen sulfide is bubbled into a solution containing 2.00 g of sodium hydroxide, assuming that the sodium sulfide is made in 92.0$\%$ yield?
There are two binary compounds of mercury and oxygen. Heating either of them results in the decomposition of the compound, with oxygen gas escaping into the atmosphere while leaving a residue of pure mercury. Heating 0.6498 g of one of the compounds leaves a residue of 0.6018 g. Heating 0.4172 g of the other compound results in a mass loss of 0.016 g. Determine the empirical formula of each compound.
Explain the differences between a hypothesis, a law, and a theory.
What theory did John Dalton formulate?
State and explain the law of definite proportions.
