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Natasha2012 [34]
4 years ago
10

A sample contains 110.68 g of calcium. How many moles is this?

Chemistry
1 answer:
pogonyaev4 years ago
4 0

Answer:

About 2.8

Explanation:

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A solution of 5. 00 g of lauryl alcohol in 0. 100 kg of benzene freezes at 4. 1°c. what is the approximate molar mass of lauryl
AVprozaik [17]

The approximate molar mass of lauryl alcohol is 183 g/mol.

As per Raoult's law:

T_b - T_s =KC m

Tb = the freezing point of benzene (5.5oC), Ts = the freezing point of the solution, K = the cryoscopic constant (5.12 K*kg/mol for benzene), and Cm = the molality of the solution.

m_{l}/Mm_{s} = C_{m} where ml is the mass of lauryl alcohol and ms is the mass of the solvent.

T_b - T_s  =KC m=Km_{l}/Mm_{s}

Therefore, M=\frac{Km_{l} }{(T_b - T_s)m_{s} }=5.12*5/0.1(5.5-4.1)=183 g/mol.

<h3>Lauryl alcohol </h3>

An organic substance called lauryl alcohol is created industrially from coconut or palm kernel oil. It is an alcoholic fat. The use of sodium lauryl sulfate and other sulfate esters of lauryl alcohol as surfactants is extremely common. In shampoos, sodium laureth sulfate, ammonium laureth sulfate, and sodium lauryl sulfate are all utilized. Lauryl alcohol has a floral scent and is flavorless and colorless. In addition to being a flavor-enhancing food additive, lauryl alcohol is also used to create medicines, lubricating lubricants, surfactants, and monolithic polymers.  Lauryl alcohol is a kind of emollient used in cosmetics.  Lauryl alcohol, a significant scent, and 1-bromododecane, an alkylating agent used to increase the lipophilicity of organic molecules, are both precursors to Lauryl alcohol.

A solution of 5. 00 g of lauryl alcohol in 0. 100 kg of benzene freezes at 4. 1°c. what is the approximate molar mass of lauryl alcohol?

Learn more about lauryl alcohol here:

brainly.com/question/14039964

#SPJ4

5 0
1 year ago
(02.02 MC)
vova2212 [387]

Answer:

Mechanical weathering will cause wearing down of rocks.

Explanation:

All the other choices aren't suitable for a dry climate where sand storms occur.

8 0
3 years ago
Complex conversion between units may require using conversion factor
Lady bird [3.3K]
That is correct boi boi boi boo boi
8 0
3 years ago
A change in the properties of matter that does not change the identity of the substance is:
Ugo [173]
No, the correct answer is B. Physical change because the identity of the substance does not change. 
For example, if you take a piece of paper and tear it in half you actually changed its property because now those pieces of paper have half the weight and and size that they did before you did anything. Now you know its a physical change because its still paper all you have done is change the physical appearance.
Hope this was helpful(;
6 0
4 years ago
Read 2 more answers
If 1.20 moles of an ideal gas occupy a volume of 18.2 l at a pressure of 1.80 atm, what is the temperature of the gas, in degree
scoundrel [369]

We can calculate for temperature by assuming the equation for ideal gas law:

P V = n R T

Where,

P = pressure = 1.80 atm

V = volume = 18.2 L

n = number of moles = 1.20 moles

R = gas constant = 0.08205746 L atm / mol K

Substituting to the given equation:

T = P V / n R

T = (1.8 atm * 18.2 L) / (1.2 moles * 0.08205746 L atm / mol K)

T = 332.70 K

We can convert K unit to ˚C unit by subtracting 273.15 to Kelvin, therefore

T = 59.55 ˚<span>C</span>

6 0
4 years ago
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