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Lilit [14]
3 years ago
14

Why is it difficult to detect the presence of isotopes of an element during chemical studies?

Chemistry
1 answer:
slavikrds [6]3 years ago
7 0

Answer:

Isotopes are atoms that have different number of neutrons, so they have a different mass number than the other atoms in an element.

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What is 694,563,239 rounded to the nearest thousand
lina2011 [118]
694,563,239 rounded to the nearest thousand is 694,563.
 
It's because the first digit from the right is for ones, second for tens, third for hundreds and fourth for thousands and that's the one that we should take a closer look at. You can round it either to 3 or 4, depends on the digit of hundreds. In this case 3239 is clearly closer to 3000 than 4000, that's why we round it to 694,563, not 694,564.
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Calculate the density of carbon dioxide at STP
Artist 52 [7]

Answer:

Density = mass/volume

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The density of the Carbon Dioxide at S.T.P. (Standard Temperature and Volume) is 1.96 gram/liter.

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3 years ago
Why does water flow decrease in your shower when someone flushes the toilet ​
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A toilet requires a large amount of cold water to flush. So, when the toilet flushes while you're in the shower, it's stealing from your shower's cold water supply. When the pressure-balancing valve senses the drop in cold water pressure, it responds by restricting the hot water pressure.

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mamaluj [8]
Number 1: (A.)
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A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as wel
murzikaleks [220]

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V equals four-thirds times pi times r cubed

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