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fiasKO [112]
4 years ago
6

The Karez well system _______. a. was the first known use of wells b. was a postindustrial system c. transported groundwater fro

m a distance d. all of the above Please select the best answer from the choices provided
Chemistry
2 answers:
Lelu [443]4 years ago
6 0

The Karez Well System is an important ancient irrigation system. It is made up of a horizontal series of vertical dug wells that are linked to each other by underground water canals. This system provides water to drink for local people as well as to water their crops. The water was collected from the mountains which are miles away from the farmland. Thus, this system transfers water from mountains in form of groundwater to people which are miles away.

Hence, the Karez well system transported groundwater from a distance.


Delicious77 [7]4 years ago
5 0
C.Ground water would be the answer.

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The gears on a bicycle are an example of what type of simple machine?
Juliette [100K]

Answer:Pulley

Explanation:

3 0
3 years ago
How many moles of NaCl will react completely with 18.5 L F2 gas at 300.0 K and 1.00 atm?
meriva
Hello!

Data:

P (pressure) = 1 atm
V (volume) = 18.5 L
T (temperature) = 300 K
n (number of mols) = ? (in mol)
R (Gas constant) = 0.082 (atm*L/mol*K)

Apply the data to the Clapeyron equation (ideal gas equation), see:
P*V = n*R*T

1*18.5 = n*0.082*300

18.5 = 24.6n

24.6n = 18.5

n =  \dfrac{18.5}{24.6}

\boxed{\boxed{n \approx 0,752\:mol}}\end{array}}\qquad\checkmark

Note: If the feedback is to be considered, the closest response is 0.751 mol Nacl

_________________
_________________

I hope this helps. =)


3 0
3 years ago
what was the purpose of running a tlc of ferrocene, the acetylferrocene product mixture, and co-spot (an overlay of ferrocene an
Mademuasel [1]

Answer:

a. All of the below

Explanation:

Column chromatography in chemistry is a chromatography method used to isolate a single chemical compound from a mixture.

TLC can be used to analyze a chemical reaction to determine if the reactants have been consumed and a new product has formed. Running a tlc of ferrocene, the acetylferrocene product mixture, and co-spot, when you view the TLC plate under a UV light, you will notice that acetylferrocene product is on the right-most lane, this shows that the reaction appears to be a success: the higher spot of ferrocene has been consumed), and a new product spot is present. From these we can observe that the we can use this to identify the number of products of the reaction, determine if the starting material is still present in the reaction and the elution in a chromatography column of the starting material and products. Therefore, all the choices are correct.

8 0
3 years ago
el diametro de la tierra en el ecuador es de 7926381 ml. redondee este numero a tres cifras significativas y expresel en notcion
elena55 [62]

7.93 x 10⁶mi

Explanation:

Significant figures are numbers that shows how accurate and precise scientific measurements are reported.

Here are some rules to identifying them;

  • All non-zero digits are significant
  • zeros between digits are significant
  • leading zero before a decimal are not significant
  • trailing zero after a decimal are significant
  • trailing zero before a decimal point are significant.

The number 7926381  has 7 significant numbers.

To write in the scientific notation, we simply express as N x 10ᵃ

   N is the number of significant number

   a is the exponent

N here is 7.93

a here is 6

            7.93 x 10⁶mi

learn more:

Significant figures brainly.com/question/2746374

#learnwithBrainly

7 0
3 years ago
Are pennies polar or non-polar?
dedylja [7]

Answer:

I think non-polar although not 100% sure

hope this helps X3

4 0
3 years ago
Read 2 more answers
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