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pav-90 [236]
3 years ago
15

Iron-59 which is used to diagnose anaemia has a half life of 45days, what fraction of it is left in 90 days

Chemistry
1 answer:
rodikova [14]3 years ago
7 0

Answer:

0.25 of the original

Explanation:

(0.5)^(90/45)

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Answer:

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Explanation:

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7 0
3 years ago
Determine the mass of each sample 1.55 kmol sulfur trioxide
xxMikexx [17]

Explanation:

Given parameters:

Number of moles of the sulfur trioxide = 1.55kmol = 1.55 x 10³mole

Unknown:

Mass of the sulfur trioxide = ?

Solution:

To solve for the mass of the sample of sulfur trioxide:

  •  Find the molar mass of the compound i.e SO₃

          atomic mass of S = 32g

                                    O = 16g

              molar mass = 32 + 3(16) = 80g/mol

  • Use the formula below:

           mass of SO₃ = number of moles x molar mass

           mass of SO₃ =  1.55 x 10³ x 80 = 124000g or 124kg

Learn more:

mole calculation  brainly.com/question/13064292

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3 0
3 years ago
What information does Jaime need to evaluate the accuracy of his calculation?
Effectus [21]

Answer:

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4 0
4 years ago
Read 2 more answers
On a graph showing distance versus time, a horizontal line represents an object that is
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Answer:

the anwser is; B: increasing its speed

5 0
3 years ago
Take car traveling with constant speed travels at 150 km in 7200 a. what is the speed of the car?
Andrej [43]
<span>Find the speed of the car in which it travels at 150 km in 7200 seconds.
This is an easy question, you just need to follow the given formula as always.
Since the time and the distance is already given, we are now looking for the speed
=> time = 7200 seconds
=> distance = 150km</span><span>
d = speed x time
S = distance / time
s = 150 km / 7200 seconds
s = 0.021 km / seconds.
Thus, the car travels for about 0.021 km per seconds.

</span>



5 0
3 years ago
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