Answer is: there is 2,69·10²³ atoms of bromine.
m(CH₂Br₂) = 39,0 g.
n(CH₂Br₂) = m(CH₂Br₂) ÷ M(CH₂Br₂).
n(CH₂Br₂) = 39 g ÷ 173,83 g/mol.
n(CH₂Br₂) = 0,224 mol.
In one molecule of CH₂Br₂, there is two bromine atoms, so:
n(CH₂Br₂) : n(Br) = 1 : 2.
n(Br) = 0,448 mol.
N(Br) = n(Br) · Na.
N(Br) = 0,448 mol · 6,022·10²³ 1/mol.
n(Br) = 2,69·10²³.

7 0

3 years ago

Please help me i will give brain list tap the question

mr_godi [17]

Answer:

molecular formulas of the hydrocarbons

6 0

3 years ago

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How many moles of methane (CH4) is<br> 6.70 x 1022 atoms of methane?

suter [353]

Answer:

0.1113 mol

Explanation:

Data Given:

no. of atoms of CH₄= 6.70 x 10²² atoms

no. of moles of methane (CH₄) = ?

Solution:

we will find no. of moles of methane (CH₄)

Formula used

no. of moles = no. of atoms / Avogadro's number

Where

Avogadro's number = 6.022 x 10²³

Put values in above equation

no. of moles = 6.70 x 10²² atoms / 6.022 x 10²³ (atoms/mol)

no. of moles = 0.1113 mol

So,

There are 0.1113 moles of methane.

8 0

3 years ago

The discharge of phosphate in detergents to the environment has led to imbalances in the life cycle of freshwater lakes. A chemi

alina1380 [7]

<h3>What is spectrometric method?</h3>

A technique called spectrophotometry uses light intensity measurements as a beam of light travels through a sample solution to determine how much a chemical compound absorbs light.
Every chemical either absorbs or transmits light across a specific spectrum of wavelengths, according to the fundamental principle.

There are two main techniques used among the various forms of spectrophotometry:
ultraviolet-visible range spectrophotometry, which examines the reflectance of certain spectra,
and absorption spectrophotometry, which examines the absorption of radiation and particular spectra of light.

Applications of spectrophotometry are useful for determining how well gases, liquids, and solids transmit, reflect, and absorb light.

Learn more about spectrometric method here:

brainly.com/question/18339003

#SPJ4

3 0

2 years ago