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aalyn [17]
2 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]2 years ago
7 0

Answer:

its a. 1/8

Explanation:

Arisa [49]2 years ago
3 0
Answer:

1/8

Explanation:

Uhm whatever the guy said ^ yeah hope you pass
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What is the mass of 2.0 moles of CO2
igor_vitrenko [27]
1 mol of CO2 is 44.01g/mol
So multiply that by 2 to get 2 mol of CO2, which is 88.02g
6 0
3 years ago
What reaction would take place if hot tugsten was surrounded by air?
Inessa05 [86]

The reaction that would take place if hot tungsten was surrounded by air is that it would react to the oxygen in air to form non conducting tungsten oxide and burns out instantly.

8 0
2 years ago
How do you determine how many neutrons an element has?
Alexandra [31]

Answer:

To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons

Explanation:

4 0
2 years ago
Please help<br><br><br> How many moles are there in 7.57 x 10^30 molecules of CO2?
Oxana [17]

Answer:

The answer is

<h2>12,574,750.83 moles</h2>

Explanation:

In order to find the moles of CO2 we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 7.57 × 10^30 molecules of CO2

We have

n =  \frac{7.57 \times  {10}^{30} }{6.02 \times  {10}^{23} }  \\  = 12574750.83056...

We have the final answer as

<h3>12,574,750.83 moles</h3>

Hope this helps you

3 0
3 years ago
How many bonds does carbon atom form
Neporo4naja [7]

Answer: Four Bonds

Explanation:

6 0
3 years ago
Read 2 more answers
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