A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much current is drawn from the batteries? _____A (b) What is the effective resistance of the flashlight? _____________Ω

A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much current is drawn from the batteries? _A (b) What is the effective resistance of the flashlight? _________Ω

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter17: Electrochemistry And Its Applications

Section17.6: E⁰cell, Gibbs Free Energy, And K⁰

Problem 17.11E

See similar textbooks

Related questions

Q: A galvanic cell is pow red by the following redox 3 Fe3+ *(aq) + Cr(OH)3(s) + 5 OH (aq) 3 Fe²+ (aq)…

A: Given that, a galvanic cell is powered by the following redox reaction: 3Fe3+aq + CrOH3s + 5OH-aq…

Q: Initial mass of copper electrode (g) 1.201g Final mass of copper electrode (g) 1.163g Initial…

A: Copper electrode mass decrease after reaction

Q: species oxidizing power Ca (ag) choose one Ni (ag) choose one V Mg (ag) choose one AI (ag) choose…

A: Electrochemical series we can identify which is higher oxidising agent which is lower Reducing…

Q: Wishing to record the "membrane potential" of a cell, Jane takes two electrodes connected to a volt…

A: A) 0mV If Jane touches the electrode tips against the plasma membrane on the extracellular side, she…

Q: Copper was electroplated from a Cu2SO4 solution onto an electrode with an active surface area of…

Q: Calculate the voltage, in V, of the following concentration cell at 25°C. Mg(s) | Mg2* (0.02 M) ||…

Q: AIF63 + 3e" --> Al + 6F" A steady current of 10 amperes is passed through an aluminum-production…

A: correct ooption C. [ (10)(15)(60)(27)]/[(96500)(3)]

Q: If the electric current is 8 and the voltage is 2, then what is the resistance? 0.25 4 6 D 10

A: Given data,Voltage(V)=2VCurrent(I)=8A

Q: The Eocell for the following reaction is 0.96V. Given this, what is the voltage of a cell that…

A: To find the voltage of the given cell, we can use the Nernst equation: Ecell = E°cell - (RT/nF)…

Q: hromium can be electroplated from aqueous potassium dichromate, with the reduction shown below. If a…

Q: An object is electroplated with rhodium for 28.2 minutes at current of 1.4 A. Rh3+ + 3 e Rh Molar…

A: According to Faraday's law of electrolysis, the amount of solid deposited is given by m =…

Q: 2. Tin-plated steel is used for tin cans. If the production of sheets of tin-plated steel requires…

A: Formulas used : I = q/t where I is the current in amperes q is the…

Q: Copper was electroplated from a Cu2SO4 solution onto an electrode with an active surface area of…

A: Given, Surface area = 5.97 cm2 Current = I = 3.41 A Time in hours = t = 0.7415 hours Density of…

Q: The time needed to plate out 1.75 g Ni(Ni2+) using a 15-amp current is about 380 minutes 190…

A: The Faraday’s Laws of electrolysis gives the information about the quantitative aspects taken place…

Question

A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W.

(a) How much current is drawn from the batteries?
_____A

(b) What is the effective resistance of the flashlight?
_____________Ω

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1:- Given information

VIEW

Step 2 :- a) current drawn from the batteries..

VIEW

Step 3 :- b) effective resistance of the flashlight.

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Wishing to record the "membrane potential" of a cell, Jane takes two electrodes connected to a volt meter. She places the cell in a dish filled with saline and touches each of the two electrode tips against the plasma membrane on the extracellular side. Jane will record a voltage of ________. -20 mV -70 mV +70 mV +10 mV 0 mV
A flashlight uses batteries that add up to 4.5 V and has a power output of 0.48 W. (a) How much current is drawn from the batteries?A(b) What is the effective resistance of the flashlight?Ω
Module 8: Ho X /7087483#/7087483/0/1 9% Question 25 of 35 - Module 7 Ho X time required: x10 TOOLS Topic: Week 4 Discussion HI Resources A current of 5.30 A is passed through a Ni(NO3), solution. How long, in hours, would this current have to be applied to plate out 9.40 g of nickel? + Ex Give Up? Hint ㄷ
49. The figure is an anodic scan or a quiescent solution cyclic voltammetry experiment of a redox couple at a 1.0 mm diameter platinum electrode at a scan rate of 100 mV/s. What causes the decrease in current at potentials more positive than +0.2 V? Current, A Scan Direction -0.2 0.2 Potential, V 0.4 0.6 (A) Electron-transfer rates slow at more positive potentials. (B) All of the reduced species in solution have been oxidized. (C) Mass transport is limited by the rate of diffusion of reduced species to the electrode surface. (D) The oxidized species formed in the reaction produce an insulating layer on the electrode surface.
Initial mass of copper electrode (g) 1.201g Final mass of copper electrode (g) 1.163g Initial mass of key (g) 8.464g Final mass of key (g) 8.525g Average current (A) 0.015 A Time of current application (s) 30 min Electroplating Calculate the percent yield of copper and suggest the sources of error in this experiment.
What is the voltage this voltmeter is measuring? Be sure your answer has a reasonable number of decimal places. magnify normal 0.1 You can click on the oth- 0.2 VDC 0.2 0.1
4
_engine.html?ClassID=1563099459# Drie. How many hours are required to produce 5.00 g of chromium metal from an acidic solution of potassium dichromate using a current of 0.50 A? Cr203 + 14H+ + 12e → 2Cr(s) + 7H20 [?] hours Round only at the end and use appropriate significant figures. Time (hour) Enter
An antique automobile bumper is to be chrome plated. The bumper, which is dipped into an acidic Cr2072- solution, serves as a cathode an electrolytic cell. The atomic mass of Cr is 52.00 g/mol. How much electrical energy in kWh is needed to deposit 185 g of Cr(s) onto the bumper using a 3.8 V as voltage source? Show your answers in two decimal places. Do NOT include units in your final answer.
If 15.0 A of current is applied, how long would it take to produce 48 g of Cr(s)? ___ hr
For lithium-ion battery reaction: Li-C6 + CoO2  LiCoO2 + C6, Eº = ~4 V, what would be the change of free energy for this reaction:A. 386 J/molB.386 kJ/gC. 107 W/molD. 107 Wh/mol
QUESTION 1 The charge and discharge current of a battery is measured in C-rate. It is defined as the current divided by the theoretical current under which the battery would deliver its nominal rated capacity (Alh or mAh) in one hour. For example, a battery rated at 1000 mAh provides 1000 mA for one hour if discharged at 1C rate. The same battery discharged at 0.5C provides 500mA for two hours. ALIFEPO4 (with a theoretical capacity of 170 mAh g) based Li ion battery contains 7.2 g LIFEPO4. Calculate the discharge current (in mA) of the battery at 20 rate.