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algol13
3 years ago
9

Water contracts as it freezes at 0°C. Solid ice is less dense than liquid water. Liquid water expands with increasing temperatur

e between 0°C and 4°C. Liquid water expands with increasing temperature above 4°C.
Chemistry
1 answer:
Mariulka [41]3 years ago
6 0

Answer:

Explanation:no when water frezzing it will expand and when it weams up it shunkes

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Vika [28.1K]
Equilibrium constant of a reaction is the ratio of concentrations of the products and the reactants when the reaction is in equilibrium. This value is independent of the concentrations since the conditions are at equilibrium instead it depends on ionic strength and temperature.

First, we write the equilibrium expression.

K = [H2S]^2 / [H2]^2 x [S2]
K = (0.725^2) / [(0.208^2) (1.13 x 10^-6)]
K = 10751545.56 or 1.08 x 10^7

Thus, the answer is A.
4 0
3 years ago
HELPPPPPPPPPPPP
erica [24]

Answer:

Pressure inside soda can = 5.56 atm

Explanation:

Given data:

Initial volume = 1250 mL

Initial pressure = 1.00 atm

Final volume = 225  mL

Final pressure = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

1.00 atm × 1250m L =  P₂ × 225 mL

P₂ =  1250 atm. mL/ 225 mL

P₂ = 5.56 atm

8 0
3 years ago
Cylinders of compressed gas are typically filled to a pressure of 200 bar. For oxygen, what would be the molar volume at this pr
mars1129 [50]

Answer:

a

 V  =   0.124 \ Liters

b

V  =  0.112 \  Liters

Explanation:

From the question we are told that

  The pressure of compressed gas is P  =  200 \  bar = \frac{200}{1.013}=  197.4 \ atm

  The  temperature is  T  =  25^oC =  25 + 273 = 298 \  K

Generally the perfect gas equation is mathematically represented as

     PV =  nRT

substituting 0.08206 L-atm/mol-K  for R and  1 mole for n

We have that

     V  =  \frac{1 *  0.08206 * 298 }{ 197.4}

       V  =   0.124 \ Liters

Generally the van der Waals equation is mathematically represented as

       nRT  =  [P + \frac{n^2 * a }{V^2 } ][V - nb]

=>1 *  0.08206 *298  =  [197.4 + \frac{1^2 *  1.364}{V^2 } ][V - 1 * 3.19 * 10^{-2}]

=>    V  =  0.112 \  Liters

7 0
4 years ago
Compare and contrast Aufbau principle and the Pauli exclusion principle.
lapo4ka [179]

Answer: Pauli exclusion principle: only two electrons can occupy the same orbital and they must have opposite spin directions

Explanation:

6 0
4 years ago
If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted
Bond [772]

Answer:

369.4 g.

Explanation:

  • The chemical reaction of reacting hydrogen with oxygen to produce water is:

<em>H₂ + 1/2 O₂ → H₂O.</em>

  • From the law of conservation of mass states that <em>the mass does not destroyed or created from nothing but it can converted from from to another one.</em>
  • The mass of the reactants = the mass of the products

∴<em> The mass of hydrogen + the mass of oxygen = the mass of water.</em>

∴ The mass of oxygen = the mass of water - the mass of hydrogen = (416.0 g) - (46.6 g) = 369.4 g.

7 0
3 years ago
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