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Questions in chemistry

[Answered] Hikers noticed that a sealed bag of potato chips puffs up when taken to the top of a mountain. Suppose that at the valley floor below, the air pressure is 1.0 atm, the temperature is [tex]$25^{\circ} C$[/tex], and the volume of the bag is 0.985 L. At the top of the mountain, the temperature is [tex]$22^{\circ} C$[/tex] and the bag has puffed up to 1.030 L. What is the air pressure on top of the mountain? Type in your answer using the correct number of significant figures. Formula: [tex]$\frac{P_1 V_1}{T_1}=\frac{P_2 V_2}{T_2}$[/tex] [$\square$] atm

[Answered] A student requires 2.00 L of [tex]$0.100 M NH _4 NO _3$[/tex] from a [tex]$1.75 M NH _4 NO _3$[/tex] stock solution. What is the correct way to get the solution? Use [tex]$M_i V_i=M_i V_t$[/tex]. A. Measure 114 mL of the 1.75 M solution, and dilute it to 1.00 L. B. Measure 114 mL of the 1.75 M solution, and dilute it to 2.00 L. C. Measure 8.75 mL of the 1.75 M solution, and dilute it to 2.00 L. D. Measure 8.75 mL of the 0.100 M solution, and dilute it to 2.00 L.

[Answered] What is a redox reaction? A. a process by which ATP molecules are transferred among molecules B. none of these C. a bad reaction to a night of partying D. a process by which electrons are passed from one molecule to another

[Answered] Select the correct answer. What is the mass percent of chlorine in chloroform $\left( CHCl _3\right)$ ? (The molar mass of $C =1201 H =1.0079$, and $Cl =35.45$.) A. $10.061 \%$ B. $29.698 \%$ C. $59.396 \%$ D. $89.094 \%$ E. $98.298 \%$

[Answered] Calculate the percentage mass of sulfur in sulfur dioxide, $SO_2$.

[Answered] Calculate the percentage mass of oxygen in sulfur dioxide, $SO_2$.

[Answered] Drag the tiles to the correct locations. Each tile can be used more than once, but not all tiles will be used. Some locations will remain empty. Chloramine has the chemical formula $NH _2 Cl$. Nitrogen has five valence electrons, each hydrogen has one valence electron, and chlorine has seven valence electrons. Complete the Lewis structure for this covalent compound. $NH - I$ = δΈ‰

[Answered] Which of the following is an example of a conjugate acid-base pair? A. $H _2 S$ and $HS ^{-}$ B. $NO _2$ and $NO _2^{-}$ C. HCl and HBr D. HF and $H ^{+}$

[Answered] Examine the effects of eutrophication.

[Answered] The following table lists the boiling points of compounds of similar structures. Explain the general trend, and explain the cause of the trend.