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4 years ago

15

Batteries, like those used in flashlights, are single electrochemical cells, not technically batteries?? true or false??????????

??

1 answer:

dezoksy [38]4 years ago

3 0

The answer is true. Hope this helps.

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Lorek lives near the North Pole. The snow in his backyard adds water to the atomosphere through______.

Elis [28]

Hello :))

Your question was:Lorek lives near the North Pole. The snow in his backyard adds water to the atomosphere through______.
The answer is: Sublimation

Hope this helps!
Good day! :D

3 0

3 years ago

To maximize the yield in a certain manufacturing process, a solution of a weak monoprotic acid that has a concentration between

stira [4]

Answer: C 115 ml

Explanation:

If you have a solution of a monoprotic acid, it means that it has the form HA (just one Hydrigen atom). Therefore, one molecule of acid is going to react with just one molecule of NaOH.

So, if you have a solution of 100 ml of 0,2 HA acid, it is going to react with a 100 ml of 0,2 M NaOH solution. Beacause we know that the acid can be a little more concentrated than 0,2 M (0,2-0,3), it probably needs a little more than 100 ml of NaOH to react. So, the answer is C.

in 100 ml of 0,2M acid you can find 0,002 mol of HA

in 100 ml of 0,3 M acid you can find 0,003 mol of HA

in 100 ml of 0,2 M NaOH you can find 0,002 mol of NaOH

the answer can not be 200 because in 200 ml of 0,2 M NaOH there are 0,004 mol of NaOH, which is more than 0,003 mol.

0 0

4 years ago

What is the ratio of blue-tailed to orange-talied critter pup?

exis [7]

Blue to orange
blue:orange
$\frac{blue}{orange}$

4 0

3 years ago

How are carbon dioxide (CO2) levels in the atmosphere affected by tectonic uplift of rocks and their resultant chemical weatheri

valina [46]

Answer:

The levels of carbon dioxide (CO2) in the atmosphere are reduced

Explanation:

Tectonic uplift refers to the process by which the surface of the earth slowly rises either due to increasing upward force applied from the plates below the surface or decreasing downward force or weight of objects like melting glaciers acting from above. During uplift, land, as well as the sea floor rises forming mountains, plateaus and volcanic Islands.

During the process of weathering, carbon dioxide present in air combines with rainwater and forms carbonic acid. This acidic rainwater then falls on uplifted mountains and rocks weathering them in the process. Minerals present in the rock such as calcium, magnesium and sodium then combine with bicarbonate ions to form carbonates such as calcium carbonate, magnesium carbonate which are found in shells of living and dead organisms and also form rocks such as limestone. In this way, carbon dioxide is removed from the atmosphere.

7 0

4 years ago

A 0.797 g sample of β‑galactosidase is dissolved in water to make 0.199 L of solution, and the osmotic pressure of the solution

gulaghasi [49]

Answer:

Molecular mass of β‑galactosidase = 1.16*10^5g

Explanation:

The osmotic pressure (π) is related to the molarity (M) of a solution by the following equation:

$\Pi = i*M*R*T$

i = Von't hoff factor = 1 for non-electrolytes

R = gas constant = 0.0821Latm/mol-K

T = temperature

Based on the above equation, molarity of β‑galactosidase is:

$\M = \frac{\Pi}{iRT}=\frac{0.000842atm}{1*0.0821Latm/mol-K*(25+273)K)}= 3.44*10^{-5}mol/L$

$Moles\ galactosidase=molarity*volume= 3.44*10^{-5}moles/L*0.199L=6.85*10^{-6} moles\\\\Molar\ Mass\ galactosidase = \frac{mass}{moles} =\frac{0.797g}{6.85*10^{-6}mol } =1.16*10^{5} g$

3 0

3 years ago