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Rus_ich [418]
2 years ago
6

It would most likely be difficult to collect a sample of which isotope? Pb-206 Po-214 U-234 Ra-226

Chemistry
2 answers:
MArishka [77]2 years ago
5 0

The easiest would be Pb-206 because it's stable

Blizzard [7]2 years ago
4 0

Answer:

Pb-214

Explanation:

i just took the test, edge 2021

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Calculate the mass (in grams) of 8.56 moles of sulfur.
oksano4ka [1.4K]

Answer:

275g

Explanation:

Depending on the molar mass you are given, you can use that to solve this.

(I'm going based on my science class' molar mass of sulphur being 32.07g/mol)

Starting off, the formula for finding moles is

n=m/M (moles = mass / molar mass)

We can manipulate this equation to solve for mass.

m=Mn

now fill in what we now.

m = 32.07*8.56

mass = 274.5192

Now round for significant digits (if you are needed to do)

mass = 275g

5 0
3 years ago
How can you explain what happened?
galina1969 [7]

Answer:

What do you mean what happened?

Explanation:

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3 0
2 years ago
Define internuclear distance.
kotykmax [81]
Internuclear distance can be defined as the distance between the nuclei atoms, i.e.,the distance between the center of nucleus to the outer most shell of an atom.
6 0
3 years ago
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An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns
-Dominant- [34]

Answer:

D ) feedback

Explanation:

When we use an air conditioner, it get turn off when reaches its required temperature and when the house warm up the air conditioning unit turns on again, that is an example of feedback.

The given condition is an example of negative feedback because in negative feedback, any change in the input is opposed by generating an output. Here also,  warming up of house (change in one direction) allows the air conditioning unit turns  on and it gives cool air (opposing that change).

Hence, the correct option is "D".

4 0
3 years ago
How to tell if an equation is exothermic or endothermic?
levacccp [35]
The standard enthalpy change of a reaction is positive thus endothermic.

The standard enthalpy change of a reaction is negative thus exothermic.

Hope it helped!
3 0
3 years ago
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