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Alik [6]
3 years ago
6

In a double-blind test, the non-control group receives a

Chemistry
1 answer:
Aleksandr [31]3 years ago
6 0

Answer:

Hi There! I'm new so I hope I get This Right! ^^

Explanation:

double blind test. the control group receives a placebo. Why is a placebo used in a double-blind test? so that the effects on people in two different groups can be compared.

happy To Help! ^^

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Pricing the product low in order to stimulate demand and increase the installed base, then trying to make high profits on the sa
Amanda [17]

Answer:

razor and blade strategy

Explanation:

Razor and blade strategy -

It refers to the method of pricing , where the price of one of the item is reduced in order to increase the sale of another item , is referred to as razor and blade strategy .

It is a type of pricing tactics used by the company to indirectly earn profit for their goods and services .

Sometimes , fews goods are given free along with certain products , in order to earn profit .

Hence , from the given information of the question ,

The correct answer is razor and blade strategy .

5 0
3 years ago
What is the mass number of an atom which contains 21 electrons, 21 protons, and 24 neutrons?
murzikaleks [220]
45 is the atomic mass of the atom. And the name is Scandium 
7 0
3 years ago
In a first-order decomposition reaction, 50.0% of a compound decomposes in 10.5 min.
mihalych1998 [28]

In this reaction 50% of the compound decompose in 10.5 min thus, it is half life of the reaction and denoted by symbol t_{1/2}.

(a) For first order reaction, rate constant and half life time are related to each other as follows:

k=\frac{0.6932}{t_{1/2}}=\frac{0.6932}{10.5 min}=0.066 min^{-1}

Thus, rate constant of the reaction is 0.066 min^{-1}.

(b) Rate equation for first order reaction is as follows:

k=\frac{2.303}{t_{1/2}}log\frac{[A_{0}]}{[A_{t}]}

now, 75% of the compound is decomposed, if initial concentration [A_{0} ] is 100 then concentration at time t [A_{t} ] will be 100-75=25.

Putting the values,

0.066 min^{-1}=\frac{2.303}{t}log\frac{100}{25}=\frac{2.303}{t}(0.6020)

On rearranging,

t=\frac{2.303\times 0.6020}{0.066 min^{-1}}=21 min

Thus, time required for 75% decomposition is 21 min.

8 0
3 years ago
What two dose the transfer of light energy require
IrinaK [193]

Answer:

Magnetic fields  and Electric fields

Explanation:

3 0
2 years ago
Which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing filtration
sergij07 [2.7K]
I think it's boiling :)
3 0
3 years ago
Read 2 more answers
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