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Questions in chemistry

[Answered] Given (i) [tex]$n=5, m_i=+1$[/tex] (ii) [tex]$n =2, \ell=1, m_{\ell}=-1, m_{ s }=-1 / 2$[/tex] The maximum number of electron(s) in an atom that can have the quantum numbers as given in (i) and (ii) are respectively: (a) 25 and 1 (b) 8 and 1 (c) 2 and 4 (d) 4 and 1

[Answered] 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]$\left(1.8 \frac{mol}{L}\right)(0.47 \square)\left(93.09 \frac{g}{mol}\right)=79 . g$[/tex]

[Answered] What's the main difference between metallic and nonmetallic luster in minerals?

[Answered] A chemical reaction is described by the following equation: [tex]$Cl_{2(l)}+2 NaI_{(a q)} \rightarrow 2 NaCl_{(a q)}+I_{2(s)}$[/tex] What type of reaction is this? Which of the statements below best describes this reaction? A. One compound breaks down into two or more substances. B. Two or more substances combine to form one compound. C. A hydrocarbon combines with oxygen to form carbon dioxide and water. D. One of the elements in a compound is replaced. E. Two compounds swap "partner" elements with each other.

[Answered] What is the formula for cobalt(II) nitride? $Co ^{+2}$ $N ^{-3}$ $CO _3 N_2$ $CO _2 N$ $CO _2 N_3$ $C _3 N_2$

[Answered] What is the Keq expression for the following equilibrium reaction? $2 CO(g)+O_2(g) \leftrightharpoons 2 CO_2(g)$ A. $Keq =\frac{[ CO ]\left[ O _2\right]}{\left[ CO _2\right]}$ B. $Keq =\frac{\left[ CO ^2\left[ O _2\right]\right.}{\left[ CO _2\right]^2}$ C. $Keq =\frac{\left[ CO _2\right]^2}{[ CO ]^2\left[ O _2\right]}$ D. $Keq =\frac{\left[ CO _2\right]}{[ CO ]\left[ O _2\right]}$

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

[Answered] 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]

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

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