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muminat
2 years ago
8

strontium-90 has a half life of 29 years. if a site held 4000 kg of this isotope, approximately what mass of strontium-90 would

be left after 87 years?
Chemistry
1 answer:
Ludmilka [50]2 years ago
4 0

Answer:

125g

Explanation:

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Ira Lisetskai [31]

Answer: mnikbm gv mvb mmbiofikfbjm

Explanation:

4 0
2 years ago
the answer choices for all are shifts to the right, shifts to the left, and no change I need help plsssss
GenaCL600 [577]
Do you still need the answer for these ? if so , i have them
8 0
3 years ago
Why can a liquid change to take the shape of its container but NOT expand to fill the container itself?
tiny-mole [99]

Answer: Option (C) is the correct answer.

Explanation:

Molecules in a liquid have less force of attraction as compared to solids. But liquid molecules have more force of attraction as compared to gases.

Since molecules of a gas are held together by weak Vander waal forces, therefore, they expand to fill the container whereas molecules in a liquid are not expanded in a container like gases because of more force of attraction within molecules of liquids as compared to gases.

Hence, a liquid can take the shape of container in which it is kept.

Thus, we can conclude that out of the given options, a liquid change to take the shape of its container but NOT expand to fill the container itself because the particles of a liquid are held together loosely enough to flow, but not so loose that they expand.


4 0
4 years ago
Read 2 more answers
Given 0.02 of KF, how many liters of solution are needed to make a 7.2 solution?
Dmitry_Shevchenko [17]

Answer:

1/360

Explanation:

let x = liters

molarity=moles of solute/liters of solution, 7.2=0.02/x or 7.2=(1/50)(1/x), 7.2(50)=(1/x), 360(x)=1, x=1/360

7 0
3 years ago
In the electron cloud model, the electron cloud is denser in some locations than in others.
Sonbull [250]
<span>In the electron cloud model, the denser areas represent that there is a great probability that a good number of electrons are ganged up or crowded in that area. The electrons affect the density of some parts of the electron cloud when they condense in those locations.</span>
8 0
3 years ago
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