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aalyn [17]
3 years ago
8

A radioactive isotope has a half-life of 2.0 years. The fraction of a pure sample of the isotope

Chemistry
2 answers:
Hunter-Best [27]3 years ago
7 0

Answer:

its a. 1/8

Explanation:

Arisa [49]3 years ago
3 0
Answer:

1/8

Explanation:

Uhm whatever the guy said ^ yeah hope you pass
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When your heart doesn't know what it wants.. what do you do?
DENIUS [597]
Follow your nose to the fruity taste of chows recharge the heart then follow your heart good luck my friend

3 0
3 years ago
10 points. Please help.
ratelena [41]

Answer:

-191.7°C

Explanation:

P . V = n . R . T

That's the Ideal Gases Law. It can be useful to solve the question.

We replace data:

2.5 atm . 8 L = 3 mol . 0.082 L.atm/mol.K . T°

(2.5 atm . 8 L) / (3 mol . 0.082 L.atm/mol.K) = T°

T° = 81.3 K

We convert T° from K to C°

81.3K - 273 = -191.7°C

6 0
3 years ago
Read 2 more answers
HELP ME PLEASE
lions [1.4K]

Answer:

A

Explanation:

Definitely not in the cell theory

3 0
3 years ago
Use the data set to answer the question.
andrezito [222]

Answer:

It is both accurate and precise.

Explanation:

Precision and accuracy are two different terms used to describe data or measurements. Accuracy refers to how close a set of measurements/experimental values is to an accepted or correct value while Precision refers to how close a series of experimental values are to one another.

In the given set of data in the question below, the Correct Value is 59.2 while the experimental values are as follows;

Trial 1: 58.7

Trial 2: 59.3

Trial 3: 60.0

Trial 4: 58.9

Trial 5: 59.2

Based on comparison, it can be observed that these experimental values are close to the correct value (59.2). Hence, they are said to be ACCURATE. Also, the experimental values are close to one another, hence, they are said to be PRECISE.

Therefore, the data set is both accurate and precise.

7 0
3 years ago
Identify the products in the following chemical resction 2NaHCO3 + CaCI2 --> CaCO3 + CO2 + 2NaCI + H2O​
Radda [10]

the products are:

CaCO3 Calcium Carbonate

CO2 carbon dioxide

NaCI Sodium chloride

H2O​ Water

8 0
3 years ago
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