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coldgirl [10]
3 years ago
9

List 4 units that are used to measure pressure

Chemistry
1 answer:
Eva8 [605]3 years ago
7 0

Answer:

ok

Explanation:

pascal kilo pascal psi pfsi

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How many significant figures are in 235.5
Lana71 [14]
There are 4 signifigant figures in 235.5.
8 0
4 years ago
BRAINLIEST IF EXPLANATION IS GIVEN AND ANSWER IS CORRECT:
Volgvan

Answer:

Q = 2997.69 J

Explanation:

Given that,

The mass of ice, m = 15.6 grams

The temperature increases from -8.76 degrees Celsius to 85.9 degrees Celsius.

The specifc heat of ice is 2.03 J/g°C

We need to find the amount of energy required. The formula for energy required is given by :

Q=mc\Delta T\\\\=15.6\times 2.03\times (85.9-(-8.76))\\\\=2997.69\ J

So, the required heat is equal to 2997.69 J.

7 0
3 years ago
So my science teacher says if you put water in a cup and then put oil in it the oil is "more dense than water" witch means the o
laila [671]
The oil would sink, due to the density of it
6 0
4 years ago
Read 2 more answers
A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9 ºC. The va
r-ruslan [8.4K]

Answer:

The solution is not ideal.

The relative strengths of the solute-solvent interactions are greater  compared to the solute-solute and solvent-solvent interactions

Explanation:

The total vapor pressure is the sum of the partial pressures of  water and methanol, and they are calculated by the Raoult´s law equation:

Pₐ = Xₐ Pºₐ, where  Pₐ is the partial pressure of component A

                              Xₐ is the molar fraction of A

                              P⁰ₐ is the pressure of pure A

So lets calculate the partial pressures of methanol and water and compare them with the given total vapor pressure of solution:

X H2O = 0.312 ⇒ X CH3OH = 1 - 0.312 = 0.688

PH2O = 0.312 x 55.3 torr =  17.3 torr

PCH3OH = 0.688 x 256 torr = 176.1 torr

Ptotal = PH2O  + PCH3OH  = 17.3 torr + 176.1 torr = 193.4 torr

This pressure is less than the experimental value of 211 torr. So the solution is not ideal. The relative strength of the solute-solvent interactions are greater than the solute-solute and solvent-solvent interactions.

The reason for this is the presence of hydrogen bonding between methanol and water.

6 0
4 years ago
If a object has a mass of 10 kilograms, how much does it weigh in newtons?
Len [333]
Depends on where the object is. On earth, moon , or somewhere without any other mass (theoretically). I think you mean how much does weigh on earth. So, the average gravitational acceleration on earth is : 9.83 m/s^2 To find out how much an object weighs, this is the formula : G=m.g where m is mass of the object g is the gravitational acceleration and G is weight. So, G = 10.9,83 = 98,3 N is the answer.
5 0
3 years ago
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