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Strike441 [17]
3 years ago
11

How many moles of RbNO2 are present in a sample with 3.4 x 1024 particles?

Chemistry
1 answer:
Sunny_sXe [5.5K]3 years ago
4 0

Answer:

5.6 mol

Explanation:

n = N/NA

n: number of moles

N: number of particles

NA: Avogadro's constant

n = 3.4×10²⁴/6.02×10²³ mol^-1 = 5.6 mol

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babunello [35]

<span>CaCO3(Calcium Carbonate)</span>

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the empirical formula of a compound is NO2. it's molecular mass is 92g/mol. What is its molecular formula?
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The molecular formula:
N_x(O_2)_x

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The molecular formula is N₂O₄.
8 0
3 years ago
A material has a volume of 63.0 cm3 and a mass of 28 grams.  What is the density of the material in g/cm3 to the correct number
dimaraw [331]

Answer:

0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).

Explanation:

  • Knowing that:

<em>d = m/V,</em>

where, d is the density of the material (g/cm³).

m is the mass of the material (m = 28 g).

V is the volume of the material (V = 63.0 cm³).

<em>∴ d = m/V </em>= (28 g)/(63.0 cm³) = <em>0.4444 g/cm³ ≅ 0.44 g/cm³ (2 significant figures).</em>

7 0
3 years ago
On the basis of your knowledge of the reaction of halogens with alkanes, decide which product you would not expect to be formed
KIM [24]

Answer:

On the basis of your knowledge of the reaction of halogens with alkanes, decide which product you would not expect to be formed in even small quantities in the bromination of ethane?

A) BrCH2CH2Br

B) CH3CH2CH2Br

C) CH3CHBr2

D) CH3CH2CH2CH3

E) BrCH2CH2CH2CH2Br

Explanation:

The reaction of ethane with bromine in presence of UV light forms mono substituted ethane at all primary and secondary carbons.

This is an example of free radical substitution.

The structure of ethane and its bromination is shown below:

Among the given options that which is not possible to form is option B) that is CH3CH2CH2Br(propyl bromide).

Remaining all other products are possisble to form on free radical substitution of ethane.

8 0
3 years ago
2. Which of the following is not a component of the plasma membrane
spayn [35]
The answer is d because it said so
7 0
4 years ago
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