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ale4655 [162]
3 years ago
8

6. A 50-year-old sample of Strontium-90 is found. The half-life of strontium is 29

Chemistry
1 answer:
Gnesinka [82]3 years ago
8 0

Answer:

the sample has mass of 50mg initially

Explanation:

https://youtu.be/ietdukGMG5c

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Choose a slideshow or presentation program to organize your research. Your presentation should contain Information collected In
beks73 [17]

Answer:

Do the work

Explanation:

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3 0
4 years ago
How many moles of Chromium are in 1.410 * 10 ^ 23 atoms of Chromium?
leva [86]

Answer:

<h3>The answer is 0.23 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities 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 we have

n =  \frac{1.410 \times  {10}^{23} }{6.02 \times  {10}^{23} }  \\  = 0.234219...

We have the final answer as

<h3>0.23 moles</h3>

Hope this helps you

4 0
3 years ago
Chemical weathering may be caused by _______________.
Amiraneli [1.4K]
Chemical weathering can be caused by oxidation, dissolution, and hydrolysis 
7 0
3 years ago
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Which planetary body was spirit designed to explore
blsea [12.9K]
Spirit designed to explore Planet Mars. It was for NASA's Mars Exploration Rover or MER mission which is an ongoing mission which includes two Mars rovers named Spirit and Opportunity. This is to discover the Martian surface and geology of the Planet Mars.
6 0
3 years ago
Which is a common unbalanced force acting on objects in motion?
Semmy [17]

Answer:

a. friction

Explanation:

What is a common unbalanced force acting in motion? Common forces that are often unbalanced include the force of gravity and applied forces. When these forces are unbalanced, objects accelerate, change their position and find new configurations for which all forces are again balanced.

Friction is a kind of force.

5 0
3 years ago
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