Draw the structure of triethylamine, which has the formula n(c2h5)3.

A solution that is 0.135 M is diluted to make 500.0 mL of a 0.0851 M solution. How many milliliters of the original solution wer

sineoko [7]

Answer:

315mL

Explanation:

Data obtained from the question include the following:

Molarity of stock solution (M1) = 0.135 M

Volume of stock solution needed (V1) =?

Molarity of diluted solution (M2) = 0.0851 M

Volume of diluted solution (V2) = 500mL

The volume of the stock solution needed can be obtain as follow:

M1V1 = M2V2

0.135 x V1 = 0.0851 x 500

Divide both side by 0.135

V1 = (0.0851 x 500) / 0.135

V1 = 315mL

Therefore, the volume of the stock solution needed is 315mL

6 0

3 years ago

Which is the best description of a cyclone?

RoseWind [281]

I think the one that best describes a cyclone is the first one (a dust storm rapidly changing weather in an area)

4 0

3 years ago

find the total pressure of a gas that initially occupied 27 L at 32 degrees Celsius and 2.5 atm, if the final conditions are 12

yawa3891 [41]

Answer: Total pressure of the gas will be 0.716atm.

Explanation: We are given a gas having initial conditions as

V = 27L

T = 32°C = 305K

P = 2.5atm

As the gas remains same, number of moles of a gas will also be same for initial and final conditions. To calculate the number of moles, we use ideal gas equation, which is,

$PV=nRT$ .......(1)

where, R = gas constant = $\text{0.08206 L atm }mol^{-1} K^{-1}$

For calculating number of moles:

$n=\frac{PV}{RT}$

Putting the values of initial condition in this equation, we get

$n=\frac{(2.5atm)(27L)}{\text{(0.08206 L atm }mol^{-1} K^{-1})(305K)}$

n = 2.696 mol

Now, the final conditions are,

V = 88.0L

T = 12°C = 285K

n = 2.696 mol (calculated above)

P = ? atm

Again using equation 1, we get

$P=\frac{nRT}{V}$

$P=\frac{(2.696mol)(\text{0.08206 L atm }mol^{-1} K^{-1})(285K)}{88.0L}$

P = 0.716atm.

7 0

3 years ago

Read 2 more answers

Explain how interactions between Earth’s spheres keep water cycling between them

Elenna [48]

There are several process in the nature, which keeps water cycling between them. By Precipitation, Earth's sphere gets water which we use in several ways, and by evaporation & sublimation, it goes back to upper spheres of the Earth's atmosphere and cycle happens again & again.

Hope this helps!

3 0

3 years ago

Convert 8.9 miles (mi) to inches (in). 1 mi = 5,280 feet (ft); 1 ft = 12 in

Minchanka [31]

Answer:One mile is also equal to 5,280 feet or 1,760 yards. The mile is a US customary and imperial unit of length. Miles can be abbreviated as mi, and are also sometimes abbreviated as m. For example, 1 mile can be written as 1 mi or 1 m. Inches. An inch is a unit of linear length measure equal to 1 / 12 of a foot or 1 / 36 of a yard.

Explanation:

5 0

3 years ago