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slavikrds [6]
3 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]3 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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How many milliliters of an aqueous solution of 0.193 M potassium carbonate is needed to
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Answer:

295 mL

Explanation:

Given data:

Volume needed = ?

Molarity of solution = 0.193 M

Mass of salt = 7.90 g

Solution:

Molarity =  number of moles of solute / volume in L

Number of moles of salt = mass/molar mass

Number of moles of salt = 7.90 g/ 138.205 g/mol

Number of moles = 0.057 mol

Volume needed:

Molarity = number of moles / volume in L

0.193 M = 0.057 mol / volume in L

Volume in L = 0.057 mol /  0.193 M

Volume in L = 0.295 L

L into mL

0.295 L × 1000 mL/1L

295 mL

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