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Helen [10]
3 years ago
9

How are microchips made?

Chemistry
2 answers:
Cerrena [4.2K]3 years ago
6 0
Building up by building up electronic circuits
kolbaska11 [484]3 years ago
5 0
One small plate lolllll sorry
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What is the most common of all compounds are composed of molecules whose atoms are arranged in a straight chain, a branched chai
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3 years ago
Suppose you have 100 grams of radioactive plutonium-239 with a half-life of 24,000 years. how many grams of plutonium-239 will r
Alexandra [31]

To solve this problem, let us first calculate for the rate constant k using the half life formula:

t1/2 = ln 2 / k

where t1/2 = half life period = 24,000 years, therefore k is:

k = ln 2 / 24,000

k = 2.89 x 10^-5 / yr

 

Now we use the rate equation:

A = Ao e^(-k t)

where,

A = mass of Plutonium-239 after number of years

Ao = initial mass of Plutonium-239

t = number of years

 

A. t = 12,000 years, find A

A = 100g e^(- 2.89 x 10^-5 * 12,000)

A = 70.7 g

 

B. t = 24,000 years, find A

A = 100g e^(- 2.89 x 10^-5 * 24,000)

A = 50 g

 

C. t = 96,000 years, find A

A = 100g e^(- 2.89 x 10^-5 * 96,000)

<span>A = 6.24 g</span>

5 0
3 years ago
When a gas is cooled at constant pressure, what happens to its molecules and volume?
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3 years ago
How many times more hydroxide ions are there in a solution with a ph of 9 than in a solution with a ph of 3?
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So your answer should be:
1,000,000


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3 years ago
Using the van der Waals equation, calculate the pressure for a 1.25 mol sample of xenon contained in a volume of 1.000L at 75°C
alina1380 [7]

Answer:

ABC

Explanation:

hrdjyt

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3 years ago
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