Tree sap is a viscoelastic polymer, which means it's not really a solid but a very viscous (sticky) fluid. It's fluidity ensures that it can properly <span>seal the spaces between the planks on wooden boats. Not only that, the pitch sap is hydrophobic - it is water resistant as well. </span>
It’s the third diagram. Gases are by far the least dense of the three main states of matter. Liquids and solids are of comparable density. Liquids assume the shape of their containers, and solids have a definite shape.
You can describe the particles of each state on the nanoscale to contribute more. Particles of a solid mostly vibrate in place and are rigidly locked together. Particles of a liquid flow past each other more, but are still tightly packed. Particles of a gas seldom even collide and have minimal attractions to each other.
You can expand on this by discussing the kinetic energy of each particle. Gases are the most energetic. Liquids second most. Solids least.
Answer:
4.419 g
Explanation:
55 years is 5.5 half lives
200 g * (1/2)^5.5 = 4.419 g
Answer:
2.0 moles S
Explanation:
To find the number of moles of S, you need to convert the moles Na to moles S via the mole-to-mole ratio. This ratio is represented by the coefficients in the balanced equation. Because you wish to find moles S, you want to put this number in the numerator. Because you want to eliminate the moles Na, this number should be in the denominator.
2 Na + 1 S ---> Na₂S
4.0 moles Na 1 mole S
---------------------- x --------------------- = 2.0 moles S
2 moles Na
It will take 497.67 years to decay.
What is half-life ?
The duration needed for a quantity to decrease to half of its initial value is known as the half-life. In nuclear physics, the phrase is frequently used to indicate how rapidly unstable atoms decay radioactively or how long stable atoms last. The phrase is also used more broadly to describe any kind of exponential decay (or, very infrequently, nonexponential decay). The biological half-life of medications and other compounds in the human body, for instance, is a term used in the medical sciences. Half-opposite life's in exponential growth is time's doubling.
The formula
At = (Ao)(0.5)(t/h)
where Ao is the initial amount determines the amount of material at a specific time t, At, with a half-life of h.
At/Ao = 0.45 from the stated results in (0.5)(t/432).
T in the equation has a value of 497.67 years.
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