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3 years ago

What creates an electric current in a battery?

Chemistry

1 answer:

sammy [17]3 years ago

8 0

Answer: The answers are kinda blury but use this info to help u out or read over the passage

Explanation:A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

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Use the words to complete the sentences. use each word one time

svlad2 [7]

Watershed....water....river.....streams....oceans....contaminate....nitrogen....phosphorous....subsidence...Thats the order...please give brainliest......

8 0

3 years ago

Cells are made of cells true or false

ivann1987 [24]

false

cells are made up of nucleus and cytoplasm and it's contained within the cell membrane

3 0

3 years ago

The rate constants of some reactions double with every 10-degree rise in temperature. Assume that a reaction takes place at 295

LUCKY_DIMON [66]

Answer : The activation energy for the reaction is, 51.9 kJ

Explanation :

According to the Arrhenius equation,

$K=A\times e^{\frac{-Ea}{RT}}$

or,

$\log (\frac{K_2}{K_1})=\frac{Ea}{2.303\times R}[\frac{1}{T_1}-\frac{1}{T_2}]$

where,

$K_1$ = rate constant at 295 K

$K_2$ = rate constant at 305 K = $2K_1$

Ea = activation energy for the reaction = ?

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = 295 K

$T_2$ = final temperature = 305 K

Now put all the given values in this formula, we get:

$\log (\frac{2K_1}{K_1})=\frac{Ea}{2.303\times 8.314J/mole.K}[\frac{1}{295K}-\frac{1}{305K}]$

$Ea=51879.96J=51.9kJ$

Therefore, the activation energy for the reaction is, 51.9 kJ

8 0

4 years ago

A hot lump of 115.7 g of an unknown substance initially at 168.3°C is placed in 25.0 mL of water initially at 25.0°C and allowed

marshall27 [118]

The substance has the specific heat capacity of steel and is therefore probably steel.

Let the specific heat of the unknown lump of substance be $c$ .

Energy Exchange = Specific Heat ⨯ Mass ⨯ Temperature Change

Energy the Hot Lump Lost = Energy the Cold Water Gained

Water has a specific heat of $4.2 \; \text{J} \cdot \text{g} ^{-1}\cdot \text{K}^{-1}$ and a density of $1 \; \text{g} \cdot \text{ml}^{-1}$ . 25.0 milliliters of water thus has a mass of 25.0 grams.

$115.7 \times (168.3 - 76.5) \; c = 4.2 \times 25.0 \times (76.5 - 25.0) \\c = 0.51 \; \text{J} \cdot \text{g}^{-1} \cdot \text{K}^{-1}$

Steel has a specific heat of approximately $0.51 \; \text{J} \cdot \text{g}^{-1} \cdot \text{K}^{-1}$ . This substance is thus <em>probably </em>steel.

4 0

4 years ago

Read 2 more answers

Is carbon reactive, non reactive, or highly reactive

e-lub [12.9K]

Answer:

carbon is non reactive

Explanation:

it doesn't react readily with other elements

due to its 4 valence electrons

7 0

3 years ago