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Anuta_ua [19.1K]
3 years ago
9

Help please answer show proof

Chemistry
1 answer:
slavikrds [6]3 years ago
5 0

Answer:

d or c

Explanation:

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A 100-w light bulb is about 16% efficient. how many joules of heat energy are siddipated by the bulb each second
pickupchik [31]

Answer:

84 Joules are wasted per second.

Explanation:

An efficiency of 16% means 84% is wasted as heat energy.  

Therefore;

For a 100W bulb;

Heat wasted = 84/100 × 100 W

                      = 84 W

Therefore;

84 W or 84 joules are wasted as heat per second

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You weigh two different objects on the same scale in the same location on Earth. The weights are different. What must be differe
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2Cu+S→Cu2S
xenn [34]

15.9 grams is the amount of copper sulfate this reaction will produce.

Given:

  • The reaction between copper and sulfur:

2Cu +S\rightarrow Cu_2S

  • 12.7 grams of copper completely reacts with 3.2 grams of sulfur to give copper sulfide.

To find:

The mass of copper sulfide produced

Solution

Mass of copper used by the scientist = 12.7 g

Mass of sulfur used by the scientist = 3.2 g

Mass of copper sulfide this reaction will produce. =?

According to the law of conservation of mass:

Total mass of reactants = Total mass of products

The total mass of reactants in the reaction = R = 12.7 g + 3.2 g = 15.9 g

The total mass of product formed in the reaction = P

P = R = 15.9 g

Mass of copper sulfide this reaction will produce = 15.9 g

15.9 grams is the amount of copper sulfate this reaction will produce.

Learn more about the law of conservation of mass:

brainly.com/question/14236219?referrer=searchResults

brainly.com/question/101125?referrer=searchResults

3 0
2 years ago
Advertisements for tobacco and alcohol products work because they "tell the truth."
Sunny_sXe [5.5K]
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What is the trend in electronegativity as elements are considered from left to right in the periodic table?
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Answer:

the answer is

the electronegativity of the elements from L to R increases

8 0
3 years ago
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