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Questions in chemistry

[Terjawab] Consider the compound, $TiO_2$. What is the charge of an oxide ion? A. +2 B. -2 C. +4 D. -4

[Terjawab] What is the Keq expression for the following reaction? [tex]A(s)+B(s) \leftrightharpoons C(s)+2 D(g)[/tex] A. [tex]Keq =\frac{1}{[D]^2}[/tex] B. [tex]Keq =[ D ]^2[/tex] C. [tex]Keq =\frac{[C][D]^2}{[A][B]}[/tex] D. [tex]Keq =\frac{[C][D]}{[A][B]}[/tex]

[Terjawab] How are cleavage and fracture of minerals different?

[Terjawab] An organic chemist measures the temperature T of a solution in a reaction flask. T=141. Convert T to SI units.

[Terjawab] Nitrates and sulfates in Earth's atmosphere create A. polar melting. B. acid rain. C. the greenhouse effect. D. equilibrium clouds.

[Terjawab] Fill in the systematic names of the following chemical compounds. Note: for compounds containing hydrogen, you may give the common name instead. | molecular formula | name of compound | | :---------------- | :--------------- | | $SiO _2$ | | | $SO _3$ | | | $SO _2$ | | | SiO | | | $NH _3$ | |

[Terjawab] The overall negative charge in $TiO _2$ is -4. What is the charge of the titanium ion? A. +4 B. +2 C. -2 D. -4

[Terjawab] Deducing the unit missing from the solution to a basic quantitative problem, a student sets up and solves the following equation to solve a problem in solution stoichiometry. Fill in the missing part of the student's equation. [tex]\frac{(1.05 mol)\left(\frac{1 mL}{10^{-3} L}\right)}{(4.7 \square)}=2.2 \times 10^2 mL[/tex]

[Terjawab] What volume of a 5% w/v solution is required to deliver a dose of 40mg?

[Terjawab] Name the following cyclic alkanes. a. b. c. d.