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3 years ago

How old is the universe

Chemistry

2 answers:

ehidna [41]3 years ago

5 0

13.8 billion years old

snow_lady [41]3 years ago

5 0

Answer:

The earth is around 6,000 years old. It cannot scientifically be 14 billion years old because earth is slowing down, this means it used to be going faster. This makes it so that carbondating cannot work because of the magnetic field and that if dinasaurs lived millions of years ago they wouldn't have gotten hit by an asteroid, they would've just flew off the earth.

Explanation:

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Why do you think the soccer ball fell more slowly than the golf ball

alexgriva [62]

Answer:

kinetic energy than the potential energy it carries

Explanation:

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3 years ago

Which statement is true of diffusion?

raketka [301]

Answer:

Molecules move from areas of high concentration to areas of low concentration.

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3 years ago

Heat transmits readily through this

Oksi-84 [34.3K]

Can you be more specific?

...Diamond is the best conductor of heat, but heat also transmits readily through many other substances. Do you have multiple choice?

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3 years ago

Two common methods to generate an aldehyde is by oxidation of an alcohol and through ozonolysis.

kotykmax [81]

Answer:

a. True.

Explanation:

Only primary and secondary alcohols can oxidise to give an aldehyde. But a weak oxidizing agent must be used to prevent formation of a carboxylic acid or ketone.

weak oxidizing agents: Chromyl chloride, silver/oxygen/500°C

take an example of ethanol:

 ${ \bf{CH _{3} CH_{2}OH \: \: \frac{Ag/O_{2} }{500 \degree C} > \: \:CH _{3} CHO}}$ 

 ${ \sf{CH _{3} CHO \: \: is \: ethanal}}$ 

By ozonolysis:

Here, reactants are Ozone gas, Carbon tetrachloride at a temperature (<20°C), ethanoic acid, zinc and water.

take an example of propanol:

if it undergoes ozonolysis, it gives ethanal and methanal.

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3 years ago

Read 2 more answers

What characterizes a strong acid or base? complete ionization in water polar covalent bonding presence of a hydroxide or hydroge

Natasha2012 [34]

1. Complete ionization in water.

2. Ionization constant.

3. A good hydrogen-ion acceptor.

4. Weak acid.

5. This base ionizes slightly in aqueous.

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3 years ago

Read 2 more answers