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Slav-nsk [51]
3 years ago
15

What creates an electric current in a battery?

Chemistry
1 answer:
kramer3 years ago
7 0

Answer:

There's a separate chemical reaction happening at the positive electrode, where incoming electrons recombine with ions taken out of the electrolyte, so completing the circuit. The electrons and ions flow because of the chemical reactions happening inside the battery—usually two of them going on simultaneously.

Explanation:

option (B) is right

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How do you write a chemical equation given a word equation ? (Chemistry)
earnstyle [38]
Step one: Identify reactants and products and place them in a word equation.

Step two: Convert the chemical names into chemical formulas. Place them based on the chemical equation and write the state symbols.

Step three: balance the chemical equation.
5 0
3 years ago
Which of these is an example of a physical change?
Vikki [24]

Answer:

b metal denting

Explanation:

8 0
3 years ago
Read 2 more answers
What volume of a 0.155 M potassium hydroxide solution is required to neutralize 25.7 mL of a 0.388 M hydrobromic acid solution
vekshin1

Answer: Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

M_1 = molarity of HBr solution = 0.338 M

V_1 = volume of HBr solution = 25.7 ml

M_2 = molarity of KOH solution = 0.155 M

V_2 = volume of KOH solution = ?

n_1 = valency of HBr = 1

n_2 = valency of KOH = 1

1\times 0.338\times 25.7=1\times 0.155\times V_2

V_2=56.0ml

Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

8 0
3 years ago
If you burn 23.4 g of hydrogen and produce 209 g of water, how much oxygen reacted?
Kitty [74]
The chemical reaction is expressed as:

2H2 + O2 = 2H2O

To determine the amount of oxygen used in the reaction, we use the amount of water produced and the relation of the substances in the reaction we do as follows:

209 g H2O ( 1 mol / 18.02 g ) ( 1 mol O2  / 2 mol H2O ) ( 32 g / 1 mol ) = 185.57 g O2
6 0
3 years ago
21) What is the mass of 5.22 moles of Na 2 CO 3
german

Answer:

5.22 moles of Na₂CO₃ have mass of 553.22 g

Explanation:

Given data:

Mass of Na₂CO₃ = ?

Number of moles of Na₂CO₃ = 5.22 mol

Solution:

Formula:

Mass = number of moles × molar mass

Molar mass of Na₂CO₃ = 105.98 g/mol

Mass = 5.22 mol  ×  105.98 g/mol

Mass = 553.22 g

Thus, 5.22 moles of Na₂CO₃ have mass of 553.22 g.

4 0
3 years ago
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