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3 years ago

I WILL GIVE YOU BRANILY PLS

Chemistry

2 answers:

Goshia [24]3 years ago

6 0

What grade level is this math?

Rus_ich [418]3 years ago

4 0

Answer:

439

Explanation:

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How many moles of carbon are in a sample of 21.45 moles of heptane(C7H16)???????

saw5 [17]

The moles of carbon that are in the sample of 21.45 moles of heptane(C₇H₁₆) is 150.15 moles

calculation

moles of carbon = moles of heptane × number of C atom

number of C atom in heptane = 1 ×7 = 7 atoms

moles is therefore = 21.45 moles × 7 =150.15 moles

3 0

3 years ago

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Electron configurations are a shorthand form of an orbital diagram, describing which orbitals are occupied for a given element.

kipiarov [429]

Answer:

[Ar] 3d10 4s2 4p3 is shorthand, 1s22s22p63s23p63d104s24p3 long hang

Explanation:

The shorthand is made using the lowest & closest noble gas, and picking up where it leaves off as follows, and longhand is made from a followed pattern you can easily find

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3 years ago

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The freezing point of water in degrees Celsius is [ Select ] __________. The freezing point of water in degrees Fahrenheit is [

ElenaW [278]

Answer: 0, 32 , 273

Explanation:

The freezing point of water in degree Celsius, Fahrenheit and Kelvin are in the following order; 0 , 32 , 273

4 0

3 years ago

What type of reaction takes place

choli [55]

Answer:

Hydration

Explanation:

* 2-propanol is converted to propene using heated alumina beads as the catalyst. The product gas is purified with a dry ice–propanol cold trap.

* the propene is hydrogenated to propane using a palladium catalyst in nearly 100% yield

5 0

3 years ago

11. Silver metal may be precipitated from a solution of silver nitrate by placing a copper strip into the solution. What mass of

Cerrena [4.2K]

Answer: The mass of silver nitrate that must be dissolved is 1.58 grams.

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ ......(1)

Given mass of silver = 1 g

Molar mass of silver = 107.86 g/mol

Putting values in equation 1, we get:

$\text{Moles of silver}=\frac{1g}{107.86g/mol}=0.0093mol$

The chemical equation for the reaction of silver nitrate and copper follows:

$2AgNO_3+Cu\rightarrow Cu(NO_3)_2+2Ag$

By Stoichiometry of the reaction:

2 moles of silver is produced from 2 moles of silver nitrate

So, 0.0093 moles of silver will be produced from = $\frac{2}{2}\times 0.0093=0.0093moles$ of silver nitrate

Now, calculating the mass of silver nitrate from equation 1, we get:

Molar mass of silver nitrate = 169.87 g/mol

Moles of silver nitrate = 0.0093 moles

Putting values in equation 1, we get:

$0.0093mol=\frac{\text{Mass of silver nitrate}}{169.87g/mol}\\\\\text{Mass of silver nitrate}=1.58g$

Hence, the mass of silver nitrate that must be dissolved is 1.58 grams.

6 0

3 years ago