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3 years ago

Examine the scenario.

Chemistry

2 answers:

GenaCL600 [577]3 years ago

6 0

Answer:

The system will try to balance the change by shifting toward the exothermic reaction, and the rate of the forward reaction will increase.

Explanation:

To balance the external cooling system has to give out heat so exothermic reaction will occur .

Viefleur [7K]3 years ago

4 0

Answer:

The system will try to balance the change by shifting toward the exothermic reaction, and the rate of the forward reaction will increase.

Explanation:

took the test got it right

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Order the following elements according to the valence numbers from lowest to highest

alexandr1967 [171]

Sodium I hope this helps

4 0

2 years ago

If helium effuses through a porous barrier in 1.34 min, how much time (in min) would it take the same amount of ammonia to effus

timofeeve [1]

Answer:

The time taken the same amount of ammonia to effuse through the same barrier under the same conditions is 2.76 minutes.

Explanation:

Let the volume of the helium gas be = V

Time taken by the helium gas = t = 1.34 min

Effusion rate of helium gas = $R=\frac{V}{1.34 min}$

If V volume of ammonia effuse through same porous barrier the effusion rate of ammonia gas will be given as:

$R'=\frac{V}{t'}$

Using Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. The equation given by this law follows the equation:

$\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}$

Molar mass of helium gas = M = 4 g/mol

Molar mass of ammonia gas = M' = 17 g/mol

$\frac{R}{R'}=\sqrt{\frac{M'}{M}}$

$\frac{\frac{V}{1.34 min}}{\frac{V}{t'}}=\sqrt{\frac{17 g/mol}{4 g/mol}}$

$t'=1.34 min\times \sqrt{\frac{17 g/mol}{4 g/mol}}=2.76 min$

The time taken the same amount of ammonia to effuse through the same barrier under the same conditions is 2.76 minutes.

8 0

3 years ago

I need help with these three please ASAP!!!!!!

ANTONII [103]

Answer:

the energy store in an object is called potential energy

the unit of measure is called a joule

Explanation:

potential is what they can do and a joule is they're potential in measurement.

6 0

4 years ago

Why you cannot see the separete particles of a solute

Novosadov [1.4K]

Solutes are when a substance is dissolved into another substance, so if it's dissolved, it is combined completely, and you can't see it anymore :)

5 0

3 years ago

Read 2 more answers

What mass of sodium oxalate na2c2o4 is needed to prepare 0.250 l of a 0.100 m solution?

Lena [83]

Molarity = number of moles of solute / liters of solution
number of moles = molarity * liters of solution
number of moles of Na2C2O4 = 0.1 * 0.25 = 0.025 moles

Now, from the periodic table:
mass of Na = 22.9 grams
mass of C = 12 grams
mass of O = 16 grams
molar mass of Na2C2O4 = 2(22.9) + 2(12) + 4(16) = 133.8 grams
Therefore, one mole is equal to 133.8 grams. To know the mass of 0.025 moles, all you have to do is cross multiplication as follows:
mass = (0.025*133.8) / 1 = 3.345 grams

7 0

3 years ago

Read 2 more answers