3 years ago

In the conclusion to the snake mole lab, you have to convert 3.45 moles of (NH4)2S04 to

Chemistry

1 answer:

Serhud [2]3 years ago

3 0

Molar mass = 132.14g/mol

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What pressure in atmospheres(atm) is equal to 45.6 kPa?

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1 kpa = 0.0098692327 atm so just multiply that by 45.6

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4 years ago

The radioactive substance cesium-137 has a half-life of 30 years. The amount At (in grams) of a sample of cesium-137 remaining a

stealth61 [152]

Answer: The amount of sample left after 20 years is 288.522 g and after 50 years is 144.26 g

Explanation:

We are given a function that calculates the amount of sample remaining after 't' years, which is:

$A_t(t)=458\times (\frac{1}{2})^{\frac{t}{30}$

For t = 20 years

Putting values in above equation:

$A_t(t)=458\times (\frac{1}{2})^{\frac{20}{30}$

$A_t(t)=288.522g$

Hence, the amount of sample left after 20 years is 288.522 g

For t = 50 years

Putting values in above equation:

$A_t(t)=458\times (\frac{1}{2})^{\frac{50}{30}$

$A_t(t)=144.26g$

Hence, the amount of sample left after 50 years is 144.26 g

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4 years ago

What is Science?

DENIUS [597]

Answer:

jesus

Explanation:

Jesus is always the answer LOL

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2 years ago

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How many atoms are in 123 g of calcium

Keith_Richards [23]

Answer:

Molar mass of Ca = 40 g / mol , given 123 g Ca is 123/40= 3.075 moles,

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Explanation:

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3 years ago

Which statement is correct?

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a) is correct.......,.....

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3 years ago