Compounds have the same properties as the elements they are made up of. Is it true or false

Chemistry

1 answer:

hodyreva [135]3 years ago

6 0

( False ) this the answer

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Methane is gas that is found in small quantities in Earth's atmosphere. Methane is the simplest hydrocarbon, consisting of one c

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Answer:

A) Nonmetal carbon shares valence electrons with each nonmetal hydrogen forming four covalent bonds.

Explanation:

Methane is formed when nonmetal carbon shares valence electrons with each nonmetal hydrogen forming four covalent bonds. Nonmetals share electrons to form covalent bonds.

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What are jupiters conditions

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In the compound H2O, the electrons in the bonds are unequally shared between oxygen and hydrogen, forming ____. (1 point)

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<span>polar bonds due to high difference . In electronegativity of oxygen and hydrogen.</span>

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4 years ago

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If a 12.0-g sample of radon-222 decays so that after 19 days only 0.375 g remains, what is the half-life of radon-222? 9.50 days

max2010maxim [7]

$A_{f}=A_{0}*(1/2)^{ \frac{t}{h}} 

A(f) - final amount,
A(0) -initial amount,t - time, h- half-life.
\\ \\0.375=12.0*(1/2)^{ \frac{19}{h}} 
\\ \\(0.375/12.0)=(1/2)^{ \frac{19}{h}} 
\\ \\log(0.375/12.0)=log(1/2)^{ \frac{19}{h}} 
\\ \\ \frac{19}{h}*log(1/2)= log(0.375/12.0)
\\ \\ \frac{19}{h}= \frac{log(0.375/12.0)}{log(1/2)} 
\\ \\ h= \frac{19log(1/2)}{log(0.375/12.0)} =3.80 (days)
\\ \\ h=3.80(days)
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Calculate The molar mass of aluminum nitrate Al(NO3)3

sleet_krkn [62]

Answer:

Molar mass: 212.996 g/mol

Explanation:

Formula: Al(NO3)3

Molar mass: 212.996 g/mol

IUPAC ID: Aluminium nitrate

Melting point: 72.8 °C

Boiling point: 135 °C

Density: 1.72 g/cm³

Soluble in: Water, Alcohol

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