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Questions in chemistry

[Terjawab] What would happen if N2 were added to N2(g) + O2(g) ⇌ 2NO (g) at equilibrium?

[Terjawab] Jason combines the two intermediate steps shown. $\begin{array}{l} N_2(g)+O_2(g) \longrightarrow 2 NO(g) \\ 2 NO(g)+O_2(g) \longrightarrow 2 NO_2(g) \end{array}$ Which best describes what Jason should do with the oxygen molecules? A. Place two of them as products. B. Place two of them as reactants. C. Cancel them out because there is one in each equation. D. Double them because there is one in each equation.

[Terjawab] Perform the following mathematical operation and report the answer to the correct number of significant figures. [tex]$3.22 \times 0.17=[?]$[/tex]

[Terjawab] Calculate the mass percentage of 15 ppm of chloroform (CHCl3) in water. (1) 15×10⁻⁴ (2) 15×10⁻³ (3) 15×10⁻⁶ (4) 15×10⁻²

[Terjawab] Describe each phase of matter based on their molecular arrangement. S ______ L ______ G ______ Give example materials for each phase of matter. S ______ and ______ L ______ and ______ G ______ and ______

[Terjawab] What is the molecular formula of the compound [tex]CH _2[/tex] with molar mass [tex]=168[/tex] [tex]g / mol[/tex]? A. [tex]C _{10} H _{20}[/tex] B. [tex]C _{12} H _{24}[/tex] C. [tex]C _{11} H _{22}[/tex] D. [tex]C _8 H _{16}[/tex]

[Terjawab] Use atomic diagrams to show how an ionic bond is formed between sodium and chlorine.

[Terjawab] Select the correct answer. This chemical equation is not balanced: [tex]AgBr(s)-Ag(s)+Br_2(g)[/tex] Why isn't it possible for the reaction to occur as indicated by the unbalanced equation? A. There are more substances on the right side of the equation than on the left side. B. There is a gas on the right side of the equation but not on the left side. C. The bromine atoms must go through a liquid state before becoming a gas. D. There is more mass represented on the right side of the equation than on the left side. E. The bromine atoms on the right side of the equation are not bonded to another element.

[Terjawab] Select the correct answer. Copper carbonate [tex]$\left( CuCO _3\right)$[/tex] reacts with hydrochloric acid [tex]$( HCl )$[/tex] according to this equation: [tex]$CuCO _3(s)+2 HCl (a q) \rightarrow CuCl _2(a q)+ H _2 O (f)+ CO _2(g)$[/tex]. Which statement correctly describes the substances in this reaction? A. Exactly one product and two reactants are either liquid or dissolved in water. B. Exactly one of the reactants is in a water-based solution, but none of the products are. C. The reactants include both a liquid and a gas. D. Exactly one reactant is a solid, and exactly one product is a gas. E. The products include a solid, a liquid, and a gas.

[Terjawab] What will be the volume of ammonia gas when [tex]$100 cm^3$[/tex] of nitrogen reacts with [tex]$150 cm^3$[/tex] of hydrogen? Which is the limiting reactant? (All gases are measured at the same temperature and pressure.)