2 years ago

OMG PLEASE HELP!! THIS IS IMPORTANT!!

Chemistry

2 answers:

sergey [27]2 years ago

6 0

Answer:

options D is correct

....hope it helps you

bogdanovich [222]2 years ago

5 0

Answer:

The cell membrane is protective layer surrounding a cell.

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What do colligative properties depend on? A) the identity of the solute b) the number of particles present in the solution c) th

Nastasia [14]

B.) Colligative properties depend on the number of particles present in the solution.

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4 0

3 years ago

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What is the number of formula units in a 9.87 mol sample of NH4NO3 ?

Varvara68 [4.7K]

Answer:

59.42 ×10²³ formula units

Explanation:

Given data:

Number of moles of NH4NO3 = 9.87 mol

Number of formula units = ?

Formula:

Number of formula units = moles × Avogadro number

Solution:

Avogadro number = 6.02×10²³

Number of formula units = 9.87 × 6.02 ×10²³

Number of formula units = 59.42 ×10²³ formula units

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3 years ago

Show a correct numerical setup for calculating the average atomic mass of sulfur

luda_lava [24]

Avg. atomic mass=∑i(isotopei×abundancei)

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3 years ago

What is the frequency of a wave of intrared light which has a wavelength of 4.35 * 10 ^ - 5 meters?

weqwewe [10]

Answer

6.9 x 10¹²Hz

Explanation:

Given parameters:

Wavelength of the wave = 4.35 x 10⁻⁵m

Unknown:

Frequency of the wave = ?

Solution:

The speed of a wave is related to the wavelength and frequency using the expression below;

C = Fλ

C is the speed of light = 3 x 10⁸m/s

F is the frequency

λ is the wavelength

Insert the given parameters and solve;

3 x 10⁸ = F x 4.35 x 10⁻⁵

F = $\frac{3 x 10^{8} }{4.35 x 10^{-5} }$ = 6.9 x 10¹²Hz

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What is the correct Lewis structure for Group 5A element, Arsenic?

irakobra [83]

Answer:

Explanation:

because of ionic bond

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2 years ago