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pav-90 [236]
4 years ago
10

20 POINTS PLEASE HELP ME!!!!

Chemistry
2 answers:
klemol [59]4 years ago
6 0
The atomic symbol that could represent an isotope that undergoes radioactive decay to produce Pb-206 would be 238/92 U. 
MariettaO [177]4 years ago
6 0

the answer is a 238/82 u


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What is the IUPAC name for the compound shown below? ch3ch2ch2cnhch2ch3
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We need the  IUPAC name of the given compound.

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3 years ago
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What is the mass of 2.70 ×10^22 molecules of NaOH (Molar mass = 40.0 g/mol)?
Viefleur [7K]
Data:
Molar Mass of NaOH = 40 g/mol

Solving: <span>According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules
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6.02*10²³y = 0.270*10²³ 
y =  \frac{0.270*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}{6.02*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}
\boxed{y \approx 0.04\:mol}


Solving: <span>Find the mass value now
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40 g ----------------- 1 mol of NaOH
x g ------------- 0.04 mol of NaOH

x = 40*0.04
\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark

Answer:
The mass is 1.6 grams
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