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3 years ago

What happens when a Bose-Einstein condensate forms?

Chemistry

1 answer:

balu736 [363]3 years ago

6 0

Answer:

Explanation:

Bose–Einstein condensate is what happens to a dilute gas when it is made very cold, near absolute zero ( −273.15 °C or −459.67 °F). It forms when the particles that make it up have very low energy. The gas has extremely low density, about one-hundred-thousandth the density of normal air.

I do hope I helped you, sir! :)

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What do the letters in the boxes of the periodic table represent

schepotkina [342]

Answer:

The letters are a one- or two-letter symbol assigned to each. element. ... The letters represent the name of the element when it was. discovered

Explanation:

What do the letters in the boxes of the periodic table represent?

A. The letters stand for the names commonly used for the elements.

C. The letters are an abbreviation of the element's name in English.

n chemistry, a symbol is an abbreviation for a chemical element. Symbols for chemical elements normally consist of one or two letters from the Latin alphabet and are written with the first letter capitalised.

Earlier symbols for chemical elements stem from classical Latin and Greek vocabulary. For some elements, this is because the material was known in ancient times, while for others, the name is a more recent invention. For example, Pb is the symbol for lead (plumbum in Latin); Hg is the symbol for mercury (hydrargyrum in Greek); and He is the symbol for helium (a new Latin name) because helium was not known in ancient Roman times. Some symbols come from other sources, like W for tungsten (Wolfram in German) which was not known in Roman times.d

7 0

3 years ago

Which set contains no ionic species?

SVEN [57.7K]

The awnser should be A

7 0

3 years ago

Why is it important to keep high acid food away from zinc coated tub

denis23 [38]

The reactions that will take place will generate Zinc salts that will taint the food. Excessive levels of these salts can cause sickness, so it is very important to ensure food hygiene standards are met by keeping acidic foods away from damaging materials like zinc that will erode and get into the food.

3 0

4 years ago

Hydrogen-3 has a half-life of 12.32 years. A sample of H-3 weighing 3.02 grams is left for 15.0 years. What will the final weigh

kaheart [24]

Answer:

$\large \boxed{\text{1.38 g}}$

Explanation:

Two important formulas in radioactive decay are

$(1) \qquad t_{\frac{1}{2}} = \dfrac{\ln 2}{k}\\\\(2) \qquad \ln \left(\dfrac{N_{0}}{N}\right) = kt$

1. Calculate the decay constant k

$\begin{array}{rcl}t_{\frac{1}{2}} &=& \dfrac{\ln 2}{k}\\\\\text{12.32 yr} &= &\dfrac{\ln 2}{k}\\\\k & = & \dfrac{\ln 2}{\text{12.32 yr}}\\\\& = & \text{0.056 26 yr}^{-1}\\\end{array}$

2. Calculate the mass remaining

$\begin{array}{rcl}\ln \left(\dfrac{A_{0}}{A}\right) &= &kt \\\\\ln \left(\dfrac{\text{3.20 g}}{A}\right) &= &\text{0.056 26 yr}^{-1}\times \text{15 yr} \\\\\ln \left(\dfrac{\text{3.20 g}}{A}\right) &= &0.8439 \\\\\dfrac{\text{3.20 g}}{A} &= &e^{0.8439} \\\\\dfrac{\text{3.20 g}}{A}&= &2.325 \\\\A &= &\dfrac{\text{3.20 g}}{2.325}\\\\&= & \textbf{1.38 g}\\\end{array}\\\text{The final mass of the sample will be $\large \boxed{\textbf{1.38 g}}$}$

8 0

3 years ago

Determine the oxidation numbers of all of the elements in the unbalanced reactions. Then, balance each redox reaction in basic s

Alisiya [41]

4. According to the explanation given in one previous session, in this case we have the following reaction:

Zn + NO3- -> Zn(OH)42- + NH3

Our important informations to have in mind always first:

Single elements = 0 of oxidation number

Zn = 0

Oxygen = 2-

NO3- = overall charge must be -1, and we have 3 oxygens, so a -6 charge, therefore N must give a charge of +5

N (reactant) = 5+

Zn(OH)42- = overall charge -2, the charge for OH is always -1, we have 4 OH, therefore -4 of charge, to give -2 of overall, Zn must have a charge of +2

Zn (product) = 2+

OH = 1-

NH3 = 0

Now for the balancing of the reaction:

4 Zn + NO3- + 7 OH- + 6 H2O -> NH3 + 4 Zn(OH)42-

8 0

1 year ago