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kozerog [31]
3 years ago
14

What heat source should you use to heat flammable organic solvents?

Biology
1 answer:
Fynjy0 [20]3 years ago
7 0
Many organic compounds are ignitable, putting them in direct flame may cause fires or combustion. it is possible to start a fire on a hot plate, but typically hot plates are not heated as high and the temperature is somewhat controll-able... you can not control the temperature of a bunsen burner very easily i would not through acetone or ethanol on a hot plate, as it can catch on fire or cause burns, but it's much worse with the bunsen burner.
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The answer is 51.0 ml but can someone explain why please
professor190 [17]

Answer:

\boxed{\sf A. \ 51 \ mL}

Explanation:

Amount of water displaced by the sphere will be equal to the volume of complete sphere.

As the sphere completely sinks to the bottom of the cup.

We have been given;

Diameter of sphere (d) = 4.6 cm

So,

\sf Radius \:  of \:  sphere  \: (r) =  \frac{Diameter \:  of \:  sphere \: (d)}{2}  \\  \sf =  \frac{4.6}{2}  \\ \sf  = 2.3 \: cm

Volume of sphere (V):

\boxed{ \bold{V =  \frac{4}{3} \pi {r}^{3} }}

By substituting value of r we get:

\sf \implies V =  \frac{4}{3}  \times \pi \times  {(2.3)}^{3}  \\  \\  \sf \implies V =  \frac{4}{3}  \times 3.14 \times 12.167 \\  \\ \sf \implies V =    \frac{152.81752}{3} \\  \\   \sf \implies V =  50.94 \:  {cm}^{3}  \\  \\   \sf \implies V  \approx 51 \:  {cm}^{ 3}

1 cm³ = 1 mL

\therefore

V = 51 mL

So,

Water displaced by the sphere = 51 mL

6 0
3 years ago
Describe the Ribosome function organelle
Alenkinab [10]
Protein synthesis as well as DNA transcription
4 0
3 years ago
What is a hypothesis?
earnstyle [38]

Answer: D.) a suggested answer to a problem

Explanation:

A hypothesis is a supposition, suggested answer or a proposed explanation based on limited evidence which can be use to start an investigation. A hypothesis is more than a guess but less than a established theory and it can be tested through study and experiments.

<u>A hypothesis is part of the scientific method </u>because it is a prediction which can be tested and the results from those experiments may disprove a hypothesis, but can never entirely prove one.

It is not a conclusion because it is an idea which tries to explain an observation. It is not information collected from experiments because hypothesis are formulated before carrying out the experiments and it is not a widely accepted idea because it just proposes a tentative explanation about a phenomenon.

7 0
3 years ago
While studying enzyme kinetics in the lab, a scientist observed that the rate of a reaction involving enzyme amylase increased a
baherus [9]
<span>B. The enzyme amylase was saturated, as all its active sites were occupied by substrate starch.

Each enzyme molecule has an active site in which it binds to a substrate to complete the enzyme-substrate complex. This means that there has to be a balance of enzyme molecules to substrate molecules. </span>
6 0
3 years ago
Read 2 more answers
Is it possible for an organism to have only one cell
zalisa [80]

Answer:

yes it is!

Explanation:

Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function.

4 0
2 years ago
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