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Basile [38]
3 years ago
12

In a chemical reaction, an iron atom became the ion Fe2+. What happened to the iron atom?

Chemistry
2 answers:
Tems11 [23]3 years ago
6 0
Iron atom is oxidized or you can say it loses 2 electrons.
Sindrei [870]3 years ago
4 0

It lost electrons and was oxidized

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How long it takes a 100 watt light bulb to use 10,000 J of electrical energy?​
vlabodo [156]

Answer:

A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.

Explanation:

Power refers to the amount of work done (or energy consumed) per unit of time. It is usually measured in watts (W), which is equal to 1 Joules per second (\frac{J}{s})

So, by definition, to calculate the power consumed or supplied in a time interval the following expression is used:

P=\frac{W}{t}

where P is the power measured in Watts, W is the work measured in Joules, and t is the time measured in seconds.

In this case:

  • P=100 Watt
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  • t= ?

Replacing:

100 Watt=\frac{10,000 J}{t}

Solving:

t=\frac{10,000 J}{100 Watt}

t=100 seconds

<u><em> A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.</em></u>

<u><em></em></u>

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Answer:

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5. An example of a muscle that is voluntarily controlled is a muscle that
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Calculate the pH of a 2.3 10-3M[OH'] solution.
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11.33

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-log(2.3x10^-3) = 2.67

14-2.67

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