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Artist 52 [7]
3 years ago
12

Explain how you would change a solution with an original pH of 8.0 to have a pH of 12.0?

Chemistry
1 answer:
pshichka [43]3 years ago
6 0

Answer: Acidity and basicity, proton concentration, the pH scale. You may have noticed that acidic things tend to taste sour, or that some basic. Since the scale is based on pH values, it is logarithmic, meaning that a change of 1 pH unit .

Explanation: PLEASE MARK ME AS BRAINLIEST

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A student collects 350 mL of a vapor at a temperature of 67°C. The atmospheric pressure at the time of collection is 0.900 atm.
Fed [463]

Answer:

Explanation:

This problem is very similar to the other that you put before, so, we'll use the same principle here.

The ideal gas equation: PV = nRT

Where:

P: pressure in atm

V: volume in L

T: Temperature in K.

n: moles

R: Gas constant (In this case, we'll use 0.082 L atm/K)

to get the molar mass of the gas, we need to know the moles, and with the mass, we can know the molar mass. However we can put the ideal gas expression with the molar mass in this way:

we know that n is mole so:

n = g/MM

If we put this in the idea gases expression we have:

PV = gRT/MM

Solving for MM we have:

MM = gRT/PV

Now, let's convert the temperature and volume to K and L respectively:

T = 67 + 273 = 340 K

V = 350 / 1000 = 0.35 L

Now all we have to do is put all the data into the expression:

MM = 0.79 * 0.082 * 340 / 0.9 * 0.35

MM = 22.0252 / 0.315 = 69.92 g/mol rounded 70 g/mol

Now, the closest answer of your options would be 72 g/mol. This could be easily explained because we do not use all the significant figures of all numbers, including the gas constant of R. However, all the work, calculations and procedure is correct and fine, and we only have a minimum range of 2 units.

6 0
3 years ago
How are protists different from plants​
kotegsom [21]

Answer/ explanation :

Protist can be multicellular or unicellular organisms

Plants are all multicellular and also exhibit cellular differentiation.

Protist can be autotroph, heterotrophic or decomposer

Plants are only autotrophs because they manufacture their own food through photosynthesis

Protists are microscopic, more diverse and abundant in nature

Plants are big and complex in nature

Nuclear DNA strands in plants are of higher complexity than those of protist

Plants require oxygen for cellular respiration process unlike protist which can be aerobic and some other species facultative anaerobic

Plants only can reproduce asexually through bulbs and tubers as in yam, potatoes while protists reproduce either sexually through meiosis or asexually through simple cell division.

8 0
3 years ago
Doping Se with P would produce a(n) ________ semiconductor with ____________ conductivity compared to pure Se.
deff fn [24]
Doping Se (group VI elements) with P(group V)elements would produce a P-TYPE semiconductor with HIGHER conductivity compared to pure Se

the reason is P dopant will introduce holes in the Se as P has lesser valence electron
4 0
3 years ago
A scientist is studying the liquid shown here. She thinks the liquid is a mixture. Describe an investigation she could do to dem
Anettt [7]

Fun fact

The heads on Easter Island have bodies. ...

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3 years ago
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A student put together the experimental setup shown below. The selectively permeable membrane is permeable to water, but not the
Galina-37 [17]
The correct answer to this question is Water will move from left to right.

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3 years ago
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