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Zolol [24]
3 years ago
9

What dose the atomic number of an element represent

Chemistry
1 answer:
lianna [129]3 years ago
8 0

Answer:

No. of electrons of the element

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What is the solution to the problem to the correct number of significant figures (102,900/12)+(170•1.27)
GarryVolchara [31]

As per as the Multiplication rules of the significant figures, whenever any numbers in the decimals forms are multiplied or divided then result in mentioned in such a way so that the significant figures after the decimal will be same as that in the given least condition.


_______________________________


102900/12 = 8575


170 × 1.27 = 215.9


∴ (102,900 ÷ 12) + (170 × 1.27) =  8575 + 215.9


= 8790.9


Now, As per as Above rules, answer in correct significant figures will be = 8791.



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Snowcat [4.5K]

(i) We start by calculating the mass of sugar in the solution:

mass of sugar = concentration × solution mass

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Then now we can calculate the amount of water:

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(ii) We use the following reasoning:

If       500 g solution contains 12.5 g sugar

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Now to get the amount of solution in liters we use density (we assume that is equal to 1):

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PLEASE HELP Determine the number of neutrons for the given isotopes:
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<span>Helium = 1
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If you look on a periodic table, on each element there is a number on the top left. This represents the number of protons in an atom. Protons have a mass of 1 (in relative to Carbon-13)

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3 years ago
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Scilla [17]
The solution that will have the lowest freezing point is 5.0 SODIUM CHLORIDE. 
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