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3 years ago

A SERIES CIRCUIT is a closed circuit with one path. a. True b. False

2 answers:

5 0

A series circuit is a closed circuit where the current follows one path. In a series circuit, the devices along the circuit loop are connected in a continuous row, so that if one device fails or is disconnected, the entire circuit is interrupted.

lisov135 [29]3 years ago

4 0

TRUE the devices in a series circuit are connected in a continuous row so if one device fails they all fail

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as the bright sun shines upon the water the water slowly disappears the same sunlight gives energy to the surrounding plants to

8090 [49]

Well when the sun makes water dissaper thats usually evaporation.

The chemical changes is when the plants absorb the energy from the sunlight and convert water and carbon dioxide into sugar and oxygen gas. Physically nothing has changed. The plant still looks the sam changes occur internally these internal changes are chemical in nature.

8 0

3 years ago

Help me answer this question pls

Anarel [89]

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3 years ago

How are plate tectonics related to earth's surface features?

melomori [17]

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4 years ago

4. a) The enthalpy change of combustion of hexane was measured using a calorimeter containing 200 cm3 of water; 0.5g of hexane (

mamaluj [8]

Answer:

The heat of combustion of hexane is -4324kjmol-1

Explanation:

Heat of combustion is the heat evolved when a mole of a substance is burned completely in oxygen under standard conditions.

To solve this problem, all the required values have been given.

Change in temperature ΔT = 30K

Mass of water =200cm3= 200g

Mass of Hexane burned = 0.5g

Step 1:

Find the amount of hear given off

Heat evolved= mass * specific eat capacity of water* temperature change

= 200 * 4.18 * 30

= 25080J

Step 2:

Calculate the relative molecular mass of hexane

RMM of C6H14 = 86g/mole.

Step 3:

Calculate the number of moles of Hexane burned

Numbrt of mole of hexane = mass / molar mass

n = 0.5 / 86

n = 0.0058mole

Step 4:

Calculate the enthalpy change of combustion for 1mole

Combustion of 0.0058mole hexane produces 25080J of heat energy

I mole hexane produces 25080 /0.0058

= 4324kJ of heat energy.

The enthalpy change of combustion of Hexane is -4,324kJmol-1.

There is no need to do anything else for the question.

7 0

3 years ago

Write the balanced chemical equation for the reaction of HF with water.

Alecsey [184]

HF + H2O --> H3O + F

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4 years ago