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zvonat [6]
3 years ago
7

Which statement best explains the results of the experiment?

Chemistry
2 answers:
Elena L [17]3 years ago
8 0
A. The dark Bacteria showed resistance to the drug.
pantera1 [17]3 years ago
5 0

Answer: A. The dark bacteria showed resistance to the drug.

Explanation:

According to the given situation, it is evident from the bacterial culture in the first plate containing the generation 1 bacteria. In generation 1 the bacteria which were exposed to the drug of the type which were resistant as well as non-resistant to the drug. But after successive generations the less resistant bacteria became susceptible to the drug and decline in numbers. Upto generation 20 only the resistant bacteria survived. Those were the dark bacteria.

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Which tool would a scientist use to measure reaction energy?
umka2103 [35]

Answer:

Calorimeter

Explanation:

Hi there ,

Your answer is calorimeter and it is a device for measuring the heat developed during a mechanical, electrical, or chemical reaction,

7 0
2 years ago
Read 2 more answers
The isomerization of methylisonitrile to acetonitrile (CH3NC(g) ???? CH3CN) is first order in CH3NC. The rate constant for the r
Hoochie [10]

Answer:

The half life is     H_{1/2}= 7333.3sec

Explanation:

   The half life of a first order  reaction is mathematically represented as

                          H_{1/2} = \frac{0.693}{Rate Constant }

 Substituting   9.45 * 10^{-5}s^{-1}  for the rate constant

                         H_{1/2} = \frac{0.693}{9.45*10^{-5}}

                                 H_{1/2}= 7333.3sec

5 0
3 years ago
Brad is swimming in the ocean on a hot sunny day. He finds the water to be much colder than the sand on the beach, but even thou
Novay_Z [31]
  • This is due to a physical property called specific heat capacity; the heat capacity of sand is lower than that of water.
  • The specific heat capacity is known as the amount of energy needed to raise the temperature of 1 g of a substance 1 degree celsius.
  • Also, the specific heat determines who quickly the temperature of material will raise or fall when it gains or loss heat energy
  • Furthermore, the specific heat of water is one of the most specific heats of the substances. Therefore, liquid water requires more heat energy to increase its temperature than sand.
  • So, it is always found that the water is cooler than sand and also water losses its energy slower than sand that the sand be cooler faster than water after sunset.
8 0
4 years ago
A particle has 3 units of positive charge and 1 unit of negative charge.What is the overall charge of the particles?
Vanyuwa [196]
<span>3 positive= +3
1 negative= -1
adding them together yields +3-1=
+2 overall charge</span>
6 0
3 years ago
Consider the diagram of the Earth, Sun, and Moon system. Which phenomenon is MOST DIRECTLY caused by the revolution of the Earth
zlopas [31]
It is commonly known that our Galaxy rotates upon the sun because of gravity. The diagrams' arrows sort of describe it. Id suggest Gravity as the answer.

5 0
3 years ago
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