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Questions in chemistry

[Terjawab] i. Describe how sulphur (VI) oxide (SO3) is converted to sulphuric acid during the process. ii. State two disadvantages of having sulphur dioxide (SO2) in the environment.

[Terjawab] Phthalonitrile $\left( C _8 H _4 N_2\right)$ is produced by the ammoxidation of o-xylene ( $C _8 H _{10}$ ) according to the following reaction: $C_8 H_{10}(l)+O_2(g)+NH_3(g) \rightarrow C_8 H_4 N_2(s)+H_2 O(l)$ How many grams of water would be produced by the complete ammoxidation of 3.98 moles of oxylene?

[Terjawab] Which is a way to express the concentration of a solution? A. parts per billion B. moles C. molar mass D. force per square meter

[Terjawab] Part D. The two elements predicted by Mendeleev were discovered later. Locate the elements gallium (Ga) and germanium (Ge) in the periodic table. Click each element to reveal its properties. Explain how these elements fit Mendeleev's predictions.

[Terjawab] In these chemical compounds, C is for carbon, O is for oxygen, and N is for nitrogen. Which chemical compound is most likely inorganic? [tex]$H _2 O$[/tex] [tex]$CH _3 NH _2$[/tex] [tex]$C _6 H _{12} O _6$[/tex] [tex]$CH _4$[/tex]

[Terjawab] Which of the following does not describe an acidic solution? The $[OH^{-}]$ is greater than $1.0 \times 10^{-7}$ The pH is less than 7.0 The $[OH^{-}]$ is $6.0 \times 10^{-10}$ The $[H_3 O^{-}]$ is greater than the $[OH^{-}]$

[Terjawab] Which one is an incorrect combination? | List-I (Ligands) | List-II (Characteristics) | |------------------------|----------------------------| | (P) Thiosulphate ion | (1) Bidentate ligand | | (Q) ortho-phenanthroline | (2) Chelating ligand | | (R) oxalate ion | (3) Contains a chiral centre| | (S) pn | (4) Monodentate ligand | | | (5) Ambidentate ligand | | | (6) Flexidentate ligand |

[Terjawab] Consider the reaction: [tex]2 NOCl(g) \leftrightarrow 2 NO(g)+Cl_2(g)[/tex] At equilibrium, the concentrations are as follows: [tex]\begin{array}{l} {[NOCl]=1.4 \cdot 10^{-2} M} \\ {[NO]=1.2: 10^{-3} M} \\ {\left[Cl_2\right]=2.2: 10^{-3} M} \end{array}[/tex] What is the value of [tex]K _{\text {eq }}[/tex] for the reaction expressed in scientific notation? A. [tex]1.6 \cdot 10^{-5}[/tex] B. [tex]6.2 \cdot 10^4[/tex] C. [tex]1.6: 10^5[/tex]

[Terjawab] What is eudiometry in chemistry and its applications in calculations?

[Terjawab] Which of these is a colorless, odorless, radioactive gas that is released when uranium decays? A. Carbon monoxide B. Chlorofluorocarbons C. Polychlorinated biphenyls D. Radon