4,349 Answered Questions for the topic Science

Science Chemistry

11/15/22

What is the solubility of La(IO₃)₃ in a solution that contains 0.400 M IO₃⁻ ions? (Ksp of La(IO₃)₃ is 7.5 × 10⁻¹²)
I got 8.85 × 10⁻⁵ M but it said that was wrong not sure what I did wrong
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Science Chemistry

11/14/22

Write the balanced equation for the overall reaction in acidic solution.
Consider a galvanic electrochemical cell constructed using Cr/Cr³⁺ and Zn/Zn²⁺ at 25 °C. The following half-reactions are provided for each metal: Cr³⁺(aq) + 3 e⁻ → Cr(s) E°red = -0.744 V Zn²⁺(aq)... more
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Science Chemistry

11/14/22

What is the [Cu²⁺] when the voltage has dropped to 0.729 V? (E⁰ for Cu²⁺/Cu = 0.340 V and E⁰ for Cd²⁺/Cd = -0.400 V.)
A voltaic cell consists of Cu²⁺/Cu and Cd²⁺/Cd half-cells. Each compartment has a volume of 0.500 L with the following initial concentrations: [Cu²⁺] = 1.250 M; [Cd²⁺] = 0.250 M at 25 °C. What is... more
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Science Chemistry

11/14/22

How many grams of silver metal are produced from Ag⁺(aq) in 1.80 h with a current of 3.50 A? (F = 96,500 C/mol)
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Science Chemistry

11/14/22

Determine the current (in A) to produce 4.20 g Ag when Ag⁺(aq) is electrolyzed for 2.00 h. (F = 96,500 C/mol)
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Science Chemistry

11/14/22

For the galvanic (voltaic) cell Cd²⁺(aq) + Fe(s) ⟶ Cd(s) + Fe²⁺(aq) (E° = 0.0400 V), what is the ratio [Fe²⁺]/[Cd²⁺] when E = 0.010 V? Assume T is 298 K
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Science Chemistry

11/14/22

For the electrochemical cell 2 Al(s) + 3 Mn²⁺(aq) ⟶ 2 Al³⁺(aq) + 3 Mn(s) (E° = 0.48 V, [Al³⁺] = 1.0 M), what is the value of E when [ Mn²⁺] = 0.046 M? Assume T is 298 K
I got -0.0108 using Nernst equation but got it wrong.
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11/13/22

how does torque relate to rocking chair?
how does torque relate to rocking chair?
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Science Math Physics

11/12/22

How to get angular momentum?
In this experiment, a disk was dropped on a rotary motion sensor. Disk 1 has a Moment of Intertia (Ia) at 3996x10-8 . Another was dropped that has a Moment of Inertia (Ib) of 1064x10-6 . The... more
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Science Math Physics

11/12/22

What is the current in a circuit?
Cons‎i‎der an LC circ‎uit with L = 50.0 [mH] and C = 5.00 [μF]. The ma‎ximum c‎rrent in t‎he induc‎tor is 0.60 [A]. What is the cu‎rr‎ent in the c‎ir‎cuit if the ca‎p‎acitor carri‎es a t‎‎hird of... more
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Science Math Physics

11/12/22

what is the resulting mutual inductance
Consider an ideal solenoid X that carries a current 2I. Another solenoid is wrapped around solenoid X resulting to a mutual inductance of 2M . If the current in X is halved, what is the resulting... more
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Science Math Physics

11/12/22

Force experienced in an electric field
S‎up‎pose we ha‎ve a ka‎ngaroo with cha‎rge q and vel‎ocity v-> =v(i^+j^). The ka‎ngaroo is immer‎sed in an ele‎ctric f‎ield E-> =Ej^ and ma‎gnetic‎ fie‎ld B-> =Bj^. W‎hat is the f‎orce... more
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Science Physics

11/12/22

How strong must the magnetic field
A be‎am of ele‎ctrons (of charge qe and mass me) is s‎hot into a reg‎ion of unif‎orm magn‎etic fi‎eld with a spee‎d of 513[m/s]. Th‎ey exit the re‎gion o‎f uni‎form magn‎etic fi‎eld op‎posite the... more
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Science English

11/10/22

what is meaning in life
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Science Biology Chemistry

11/08/22

Which statement best describes why genes are considered the agent of heredity?

Which statement best describes why genes are considered the agent of heredity? All cells contain the same genes. Different cells express different genes. Genes are passed from one generation to the... more
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Science Chemistry

11/07/22

How many hours does it take to form 15.0 L of O₂ measured at 750 torr and 30°C from water by passing 4.55 A of current through an electrolytic cell?
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Science Chemistry

11/07/22

Complete and balance the following redox reaction in acidic solution. Be sure to include the proper phases for all species within the reaction.
ReO4^-(aq)+MnO2(s)==>Re(s)+MnO4^-(aq)
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Science Chemistry

11/07/22

Complete and balance the following redox reaction in basic solution. Be sure to include the proper phases for all species within the reaction.
Cr2O7^2-(aq)+I2(s)==>Cr^3+(aq)+IO3^-(aq)
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Science Math Biochemistry

11/06/22

How do i determine what is the concerntration, mass and volume of a solution in an equation / question like this ?
what is the mass of a solid present in 50 ml of a 40% solution? give the mass in g
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Science Math Biochemistry

11/06/22

How would you prepare a serial dilution of methyl red starting with a stock solution of 2 mM and requiring at least 200 mL of the following concentrations, 25, 5, 1, 0.2, 0.04 mM?
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Science Math Biochemistry

11/06/22

how do i answer this question?
What is the ratio of ionized/deionized cacodylate at pH 5 (pKa = 6.2)?
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Science Math Biochemistry

11/06/22

How do i work this question out?
What would be the pH of a solution containing 1 M sodium acetate and 0.5 M acetic acid (pKa = 4.75)? answer to 2 dp.
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11/06/22

what is a good sentence starter for presenting a solution on a problem in concept paper?
what is a good sentence starter for presenting a solution on a problem in concept paper?
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11/06/22

where should i put my thesis statement in conclusion of concept paper?
where should i put my thesis statement in conclusion of concept paper?
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11/05/22

is this a good thesis statement?
is this a good thesis statement?this phenomenon calls for researchers to look for healthier solutions that could reduce and relieve people's stress while enhancing their health.
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