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3 years ago

8

A liquid with a high viscosity cannot be a mixture.

1 answer:

enot [183]3 years ago

5 0

It can be made true by changing "cannot" to "can".

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Does electricity flow from negative to positive right

kirill [66]

Two types of charges are involved in electricity flow, these are positive charges and negative charges. The negative charges are called electrons and they are the ones that are responsible for electricity flow. The negative terminal of a battery for example has excess of electrons while the positive terminal lacks electrons. Thus, electricity flows by the movement of electrons from the negative terminal to the positive terminal.

4 0

3 years ago

Read 2 more answers

A fossil is found to have a 14 C 14C level of 70.0 70.0 % compared to living organisms. How old is the fossil?

natulia [17]

Answer:

The age of the fossil be $2.1987\times 10^{4} years$ .

Explanation:

Formula used :

$N=N_o\times e^{-\lambda t}\\\\\lambda =\frac{0.693}{t_{\frac{1}{2}}}$

where,

$N_o$ = initial mass of isotope C-14 = x

N = mass of the parent isotope left after the time, (t) = 70.0% of x=0.07x

$t_{\frac{1}{2}}$ = half life of the isotope C-14 = 5730 years

$\lambda$ = rate constant

Let the age of the fossil be t.

Now put all the given values in this formula, we get t :

$0.07x=x\times e^{-(\frac{0.693}{5730 years})\times t}$

$t=2.1987\times 10^{4} years$

The age of the fossil be $2.1987\times 10^{4} years$ .

8 0

3 years ago

How acetophenone can be converted to phenol by reaction?

zysi [14]

Answer:

m-CPBA followed by base catalysed hydrolysis

Explanation:

The scheme of this reaction is shown in the image attached.

We can see here that the acetophenone reacts with metachloroperoxybenzoic acid (m-CPBA) as shown in the image to yield phenyl acetate.

Phenyl acetate is now hydrolysed by a base as shown to yield the acetate ion and phenol.

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3 years ago

Which organelle this illustration represent?

Tema [17]

That illustration represents the mitochondria

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3 years ago

Rocks formed by changes in heat and pressure or the presence of hot

pantera1 [17]

The answer would be: Igneous Rocks

7 0

4 years ago