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VMariaS [17]
3 years ago
15

What is the Ozone Layer?

Chemistry
1 answer:
kozerog [31]3 years ago
8 0
A layer above the earth that protects the planet from dangerous UV that are sent from the sun
You might be interested in
1. A sealed 2500mL flask is filled to capacity with 163g of a slimy green liquid. What is the density of the liquid?
Ksju [112]

Answer:

<h2>0.065 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{163}{2500}  \\  = 0.0652

We have the final answer as

<h3>0.065 g/mL</h3>

Hope this helps you

6 0
3 years ago
Read 2 more answers
During what stage of the life cycle is an animal able to reproduce? (2 points) a Adolescent b Adult c Embryo d Infant
oee [108]

Answer:

B, adult

Explanation:

The stage of an animals life cycle when it reproduce.

Egg a structure containing food that young animal need in order grow hatching the process by which an animal breaks out of an egg

6 0
2 years ago
Explain why a balloon filled with O2 at room temperature collapses when cooled in liquid nitrogen where as balloon filled with H
Yuri [45]
When cooled by liquid nitrogen, the balloon shrinks (not as much as the air-filled balloon) and it sinks down on the table. When heating up, the balloon slowly rises and flies up in the air again. Explanation 1: The volume of the balloon decreases by the low temperature, because the gas inside is cooled down.
5 0
3 years ago
A lab technician mixed a 550 ml solution of water and alcohol. if​ 3% of the solution is​ alcohol, how many milliliters of alcoh
kupik [55]

The solution 550 ml total and first we will find the amount of alcohol. 3% = 0.03 550 ml x .03 = 16.5 ml alcohol
 Then to find the amount of water used, we just have to subtract the amount of alcohol from the total volume  
550 ml total - 16.5 ml alcohol = 533.5 ml water
5 0
3 years ago
14. An enzyme-catalyzed reaction was carried out with the substrate concentration initially a thousand times greater than the Km
emmainna [20.7K]

Answer:

27 min

Explanation:

The kinetics of an enzyme-catalyzed reaction can be determined by the equation of Michaelis-Menten:

v = \frac{vmax[S]}{Km + [S]}

Where v is the velocity in the equilibrium, vmax is the maximum velocity of the reaction (which is directed proportionally of the amount of the enzyme), Km is the equilibrium constant and [S] is the concentration of the substrate.

So, initially, the velocity of the formation of the substrate is 12μmol/9min = 1.33 μmol/min

If Km is a thousand times smaller then [S], then

v = vmax[S]/[S]

v = vmax

vmax = 1.33 μmol/min

For the new experiment, with one-third of the enzyme, the maximum velocity must be one third too, so:

vmax = 1.33/3 = 0.443 μmol/min

Km will still be much smaller then [S], so

v = vmax

v = 0.443 μmol/min

For 12 μmol formed:

0.443 = 12/t

t = 12/0.443

t = 27 min

7 0
3 years ago
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