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slavikrds [6]
2 years ago
10

A circuit is shown in the picture above. Energy is transferred first from the battery to the circuit wire and then from the circ

uit wire to
the light. What energy transformations occur between these two transfers?
OA. Energy is transformed first from chemical energy to mechanical energy and then from mechanical energy to light and
heat energy
OB. Energy is transformed first from chemical energy to light and heat energy and then from light and heat energy to
electrical energy
OC. Energy is transformed first from chemical energy to electrical energy and then from electrical energy to light and heat
energy
OD Energy is transformed first from mechanical energy to chemical energy and then from chemical energy to light and heat
energy
Chemistry
1 answer:
sp2606 [1]2 years ago
8 0

Answer:its D.

Explanation:

Energy is transformed first from chemical energy to electrical energy and then from electrical energy to light and heat energy.

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3 years ago
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Based on the equation, how many grams of Br2 are required to react completely with 36.2 grams of AlCl3?
s2008m [1.1K]

Answer:

65.08 g.

Explanation:

  • For the reaction, the balanced equation is:

<em>2AlCl₃ + 3Br₂ → 2AlBr₃ + 3Cl₂,</em>

2.0 mole of AlCl₃ reacts with 3.0 mole of Br₂ to produce 2.0 mole of AlBr₃ and 3.0 mole of Cl₂.

  • Firstly, we need to calculate the no. of moles of 36.2 grams of AlCl₃:

<em>n = mass/molar mass</em> = (36.2 g)/(133.34 g/mol) = <em>0.2715 mol.</em>

<u><em>Using cross multiplication:</em></u>

2.0 mole of AlCl₃ reacts with → 3.0 mole of Br₂, from the stichiometry.

0.2715 mol of AlCl₃ reacts with → ??? mole of Br₂.

∴ The no. of moles of Br₂ reacts completely with 0.2715 mol (36.2 g) of AlCl₃  = (0.2715 mol)(3.0 mole)/(2.0 mole) = 0.4072 mol.

<em>∴ The mass of Br₂ reacts completely with 0.2715 mol (36.2 g) of AlCl₃ = no. of moles of Br₂ x molar mass</em> = (0.4072 mol)(159.808 g/mol ) = <em>65.08 g.</em>

4 0
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Identify the type of reaction in the chemical reaction below:
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Complete question is;

Identify the type of reaction in the chemical reaction below:

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Explanation:

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