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Anastasy [175]
3 years ago
13

What is a centrifuge used for?

Chemistry
2 answers:
Romashka-Z-Leto [24]3 years ago
7 0
For spinning liquid samples at high speeds, usually for suspensions or mixtures.
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tatiyna3 years ago
5 0
<span>It is used for the separation of fluids, gas or liquid, based on density.

Hope this helps!</span>
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The conversion of cyclopropane to propene occurs with a first-order rate constant of . How long will it take for the concentrati
Gennadij [26K]

This is an incomplete question, here is a complete question.

The conversion of cyclopropane to propene occurs with a first-order rate constant of 2.42 × 10⁻² hr⁻¹. How long will it take for the concentration of cyclopropane to decrease from an initial concentration 0.080 mol/L to 0.053 mol/L?

Answer : The time taken will be, 17.0 hr

Explanation :

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  = 2.42\times 10^{-2}\text{ hr}^{-1}

t = time passed by the sample  = ?

a = initial concentration of the reactant  = 0.080 M

a - x = concentration left = 0.053 M

Now put all the given values in above equation, we get

t=\frac{2.303}{2.42\times 10^{-2}}\log\frac{0.080}{0.053}

t=17.0\text{ hr}

Therefore, the time taken will be, 17.0 hr

5 0
3 years ago
How does density relate to the cold and warm air masses?
Amanda [17]
Warmer  air   is   less  dense  than  cold air.As  air  warm  it  rises  while  the  cold  air  sink. Warmer  air  masses forces the  cooler  air to  move  which  causes  wind.  These  is  illustrated  when  you  open  a hot oven the  hotter  air  inside  the  oven  rises  into  cooler  air  outside  the  oven.
3 0
3 years ago
A detail that distinguishes a solid from a liquid is-------?
svetoff [14.1K]
A solid is hard and the molecules are packed together, a liquid can move around freely because the molecules aren't as packed together :)
8 0
3 years ago
Read 2 more answers
True or Fase. Every substance has to be classified as either acid or base?
Sever21 [200]

Answer:

False

Explanation:

Some substances don't have to be

8 0
3 years ago
HELP!!! WILL RECEIVE BRAINLIEST!!!!! What is the independent variable
ycow [4]
You kind of need to show more, but the independent variable would be something that you are changing to then measure the reaction, like the time left in for example.
3 0
3 years ago
Read 2 more answers
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