VincenTragosta - Tanya, Jawab, dan Belajar Tanpa Batas Logo

Questions in chemistry

[Terjawab] The molality of a solution containing 36g of glucose (C6H12O6) in 250g of water is: (a) 0.4 m (b) 0.6 m (c) 0.8 m (d) 1.2 m

[Terjawab] Which represents the correct equilibrium constant expression for the reaction below? [tex]Cu(s)+2 Ag^{+}(aq) \longleftrightarrow Cu^{2+}(aq)+2 Ag(s)[/tex] A. [tex]Keq =\frac{[ Cu ]\left[ Ag ^{+}\right]^2}{\left[ Cu ^{2+}\right][ Ag ]^2}[/tex] B. [tex]K_{e q}=\frac{\left[ Cu ^{2+}\right]\left[ Ag ^2\right.}{[ Cu ]\left[ Ag ^{+}\right]^2}[/tex] C. [tex]Keq=\frac{\left[ Ag ^*\right]^2}{\left[ Cu ^{2+}\right]}[/tex] D. [tex]Keq=\frac{\left[ Cu ^{2+}\right]}{\left[ A g ^{+}\right]^2}[/tex]

[Terjawab] Use the periodic table in the tools bar to answer these questions. How many moles of AgNO3 are present in 1.50 L of a 0.050 M solution?

[Terjawab] Despite their efficiency, what environmental concern is raised about compact fluorescent bulbs? A. excessive brightness B. mercury content and disposal C. too efficient

[Terjawab] An unbalanced chemical equation for the reaction of boron fluoride with lithium sulfite is shown below. [tex]BF _3+ Li _2 SO _3 \rightarrow B_2( SO _3)_3+ LiF[/tex] What is the coefficient of lithium fluoride in the balanced chemical reaction? 1 3 4 6

[Terjawab] The reaction A (aq) ⇌ B (aq) + C (aq) has an equilibrium constant given by: Kc = [B]eq [C]eq / [A]eq Where [X]eq is the equilibrium concentration of X in mol dm⁻³. If a 2.0 mol dm⁻³ solution of A is allowed to reach equilibrium, at which 1.2 mol dm⁻³ of A remains, find the equilibrium concentrations of B and C in mol dm⁻³. Give your answer to 1 significant figure.

[Terjawab] What is the net charge of the ionic compound calcium fluoride? A. 1+ B. 1- C. 2- D. 0

[Terjawab] Which of the following statements is true about single-replacement reactions? A. They involve a single product. B. They are restricted to metals. C. The element replacing the ion in the other reactant must be more active. D. Any metal replaces any other metal.

[Terjawab] What volume, in liters, of 2.0 M NaOH solution can be made using 500.0 g NaOH? [tex]$NaOH : 39.997 g / mol$[/tex] [?] L

[Terjawab] Which of the following is an acid-base reaction? [tex]Fe ( s )+2 AgNO _3( aq ) \rightarrow 2 Ag ( s )+ Fe \left( NO _3\right)_2( aq )[/tex] [tex]C ( s )+ O _2(g) \rightarrow CO _2(g)[/tex] [tex]MgSO _4( aq )+ Ba \left( NO _3\right)_2( aq ) \rightarrow Mg \left( NO _3\right)_2( aq )+ BaSO _4(s)[/tex] [tex]2 HClO _4( aq )+ Ca ( OH )_2( aq ) \rightarrow 2 H _2 O ( I )+ Ca \left( ClO _4\right)_2( aq )[/tex] None of the above are acid base reactions.