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3 years ago

So confused can someone help ?

Chemistry

1 answer:

nika2105 [10]3 years ago

6 0

Answer:

well in a solid pack together as tightly as possible in a neat and ordered arrangement.

and a liquid are close together (touching) but they are able to move/slide/flow past each other

Explanation:

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A 0.500-g sample of chromium metal reacted with sulfur powder to give 0.963 g of product. Calculate the empirical formula of the

IgorC [24]

Answer: The empirical formula for the given compound is $Cr_2S_3$

Explanation : Given,

Mass of product = 0.963 g

Mass of Cr = 0.500 g

Mass of S = 0.963 g - 0.500 g = 0.463 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Cr = $\frac{\text{Given mass of Cr}}{\text{Molar mass of Cr}}=\frac{0.500g}{52g/mole}=0.00962moles$

Moles of S = $\frac{\text{Given mass of S}}{\text{Molar mass of S}}=\frac{0.463g}{32g/mole}=0.0145moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.00962 moles.

For Cr = $\frac{0.00962}{0.00962}=1$

For S = $\frac{0.0145}{0.00962}=1.5$

To make in a whole number we are multiplying the ratio by 2, we get:

The ratio of Cr : S = 1 : 1.5

The ratio of Cr : S = 2 : 3

Step 3: Taking the mole ratio as their subscripts.

The ratio of Cr : S = 2 : 3

Hence, the empirical formula for the given compound is $Cr_2S_3$

8 0

4 years ago

What is the angle between the carbon-chlorine bonds in the phosgene ( cocl2 ) molecule?

lina2011 [118]

Answer: The angle between the carbon-chlorine bonds in phosgene will be 120°

Explanation: Formula used to calculate the hybridization:

${\text{Number of electron pairs}} =\frac{1}{2}[V+N-C+A]$

where,

V = number of valence electrons present in central atom i.e. carbon = 4

N = number of monovalent atoms bonded to central atom = 2

C = charge of cation = 0

A = charge of anion = 0

For $COCl_2$

${\text{Number of electron pairs}} =\frac{1}{2}[4+2-0+0]=3$

The number of electron pairs are 3 which means that the hybridization will be $sp^2$ and the electronic geometry of the given molecule will be trigonal planar.

The bond angle in this electronic geometry is 120°

The structure of phosgene is attached below.

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3 years ago

If your experimentally measured volume of the bolt was too small, would that make the density value larger or smaller?

MakcuM [25]

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3 years ago

Hay particulas mas pequeñas que el atomo?

svp [43]

Answer:

Una partícula subatómica es aquella que es más pequeña que el átomo. Puede ser una partícula elemental o una compuesta, a su vez, por otras partículas, como los quarks que componen los protones y los neutrones. ... De esta manera, se han descubierto docenas de partículas subatómicas, y se teorizan cientos de otras más.

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3 years ago

2 main reasons why we have<br> seasons.

Ket [755]

Answer:

Tilt of a planet's axis and its orbit around the sun.

Explanation:

hope this helps! :)

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3 years ago