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3 years ago

According to the table, a 23-30 watt CFL provides __ lumens and is equivalent to a incandescent bulb.

Chemistry

1 answer:

Bumek [7]3 years ago

3 0

Answer:

The correct options are;

1. 1,600

2. 100 Watts

A 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb

Explanation:

Brightness is measured in lumens and watts measure energy usage therefore with the use of an energy saving light bulb, the same lumination can be obtained at a lower energy usage.

According to a comparison chart for LED Lights vs. Incandescent Light Bulbs vs. Compact Fluorescents (CFLs) from USAI lightening website 23-30 watts CFL has a light output of 1,600 and is therefore produces enough light as a 100 Watts Incandescent Light Bulb

Also according to energy.gov website, CFLs save up to 75% energy such that a 23-30 watt CFL can produce the same illumination as a 100 watt incandescent bulb

Therefore we have, a 23-30 watt CFL provides 1,600 lumens and is equivalent to a 100 Watts incandescent bulb.

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3 years ago

If the azeotropic mixture is 72% perchloric acid by mass, what is the mole percent of water in the azeotrope?

WARRIOR [948]

Answer:

Mole percent of water in azeotrope is 69%

Explanation:

Clearly, the azeotrope consists of water and perchloric acid.

So, 72% perchloric acid by mass means 100 g of azeotrope contains 72 g of perchloric acid and 28 g of water.

Molar mass of water = 18.02 g/mol and molar mass of perchloric acid = 100.46 g/mol

So, 72 g of perchloric acid = $\frac{72}{100.46}mol$ of perchloric acid = 0.72 mol of perchloric acid

Also, 28 g of water = $\frac{28}{18.02}mol$ of water = 1.6 mol of water

Hence total number of mol in azeotrope = (1.6+0.72) mol = 2.32 mol of azeotrope

So, mole percent of water in azeotrope = [(moles of water)/(total no of moles)] $\times 100$ %

Mole percent of water = $\frac{1.6}{2.32}\times 100$ % = 69%

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4 years ago

According to the table, a 23-30 watt CFL provides __________ lumens and is equivalent to a ________ incandescent bulb.

According to the table, a 23-30 watt CFL provides __ lumens and is equivalent to a incandescent bulb.