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2 years ago

11

When making an observation you should provide a general description of the subject rather than going into too much detail true o

r false

1 answer:

vodka [1.7K]2 years ago

8 0

In an observation in an experiment, you want to write down as much detail as possible. So the answer would be false.

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Many people avoid processed food to eliminate unnecessary ingredients like food dyes and excess sodium from their diets. A study

kvv77 [185]

It should be the answer b but I’m not to sure

4 0

3 years ago

From Young's experiment, how does the frequency of light affect the number of lines observed?

Marina CMI [18]

Answer : (C) "Higher frequencies have larger spaces between lines".

Explanation:

In Young's experiment, the condition for constructive interference is given by :

$dsin\theta=n\lambda$ .........(1)

n is order or number of lines observed

d is distance between slits

$\theta$ is the angle between the path and the line from screen to the slits.

We also know that, $c=\nu \lambda$

or

$\lambda=\dfrac{c}{\nu}$

where,

c is the speed of light

$\nu$ is frequency

$\lambda$ is wavelength

So, equation (1) turns into

$dsin\theta=n\dfrac{c}{\nu}$

$\nu=\dfrac{n\ c}{d\ sin\theta}$

So,

$\nu\propto n$

or

Higher frequencies have larger spaces between line.

So, correct option is (C).

3 0

2 years ago

Read 2 more answers

How many molecules of NH3 are produced from 4.72x10 negative 4 power g of H2?

Delvig [45]

<span>9.40x10^19 molecules.
The balanced equation for ammonia is:
N2 + 3H2 ==> 2NH3
So for every 3 moles of hydrogen gas, 2 moles of ammonia is produced. So let's calculate the molar mass of hydrogen and ammonia, starting with the respective atomic weights:
Atomic weight nitrogen = 14.0067
Atomic weight hydrogen = 1.00794

Molar mass H2 = 2 * 1.00794 = 2.01588 g/mol
Molar mass NH3 = 14.0067 + 3 * 1.00794 = 17.03052 g/mol

Moles H2 = 4.72 x 10^-4 g / 2.01588 g/mol = 2.34140921086573x10^-4 mol
Moles NH3 = 2.34140921086573x10^-4 mol * (2/3) = 1.56094x10^-4 mol

Now to convert from moles to molecules, just multiply by Avogadro's number: 1.56094x10^-4 * 6.0221409x10^23 = 9.400197448261x10^19
Rounding to 3 significant figures gives 9.40x10^19 molecules.</span>

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3 years ago

Reaction of phenol with 1,2-epoxypropane in aqueous sodium hydroxide at 150°C gives a single product, C9H12O2. in 90% yield. Sug

12345 [234]

Answer: 2-Benzyloxyethanol is produced reaction in the fig. below.

Explanation:

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2 years ago

Which is an example of gene modification that humans have done for thousands of years?

miv72 [106K]

Cross breeding plants to make better apples

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3 years ago