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3 years ago

How many seconds are in one millisecond?

Chemistry

1 answer:

zlopas [31]3 years ago

7 0

Explanation:

I thought it was B, but i was wrong... TwT, so now you know not to choose that one, but i belive the right answer was D.

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Explain how each of the following relates to a Graph.

kolbaska11 [484]

The dependent variable depends on the independent variable

6 0

4 years ago

A diffusion coefficient KG was determined for the diffusion of a gas A through a stagnant film B [KG = 0.88 mol//h-ft2-atm].

Angelina_Jolie [31]

Explanation:

Transfer of mass A into stagnant film B depends on the availability of driving force.

Whereas driving force is the pressure difference at the surface of A and the bulk.

As, $N_{A} \propto (P_{A1} - P_{A2})$

$N_{A} = K_{G} \times (P_{A1} - P_{A2})$

Therefore, putting the given values into the above formula as follows.

$N_{A} = K_{G} \times (P_{A1} - P_{A2})$

= $0.88 \times (0.2 atm - 0.05 atm)$

= 0.132 $mol/h.ft^{2}$

Thus, we can conclude that the flux of A from a surface into a mixture of A and B is 0.132 $mol/h.ft^{2}$

4 0

4 years ago

What is the formula or equation for<br><br>motion,speed and energy?

DedPeter [7]

Energy is equal to motion over speed

7 0

3 years ago

Read 2 more answers

The total amount of energy before and after a chemical reaction is the same. Therefore, energy is _____.

BabaBlast [244]

Answer:

Option (a) is the correct answer.

Explanation:

The law of conservation of energy states that energy can neither be created nor it can be destroyed. It can only be transformed from one form to another.

Therefore, the total amount of energy before and after a chemical reaction is the same. Thus, energy is conserved.

Therefore, we can conclude that option (a) is the correct answer.

8 0

3 years ago

Read 2 more answers

A flask contains 2.0 mol of He gas at 25°C and 1.00 atm. How much He gas, in grams, must be added to increase the pressure to 2.

katrin [286]

Answer:

Mass of He required = 8.0 g

Explanation:

Given,

Initial moles of He = 2.0 mol

Initial pressure = 1.00 atm

final pressure = 2.00 atm

Ideal gas equation,

PV = nRT

As V, R and T are constant

So, $\frac{P_1}{P_2} =\frac{n_1}{n_2}$

$\frac{1.00 atm}{2.00 atm} =\frac{2.0}{n_2}\\n_2=\frac{2.0\times 2.00}{1.00} \\n_2=4.0 mol$

Molar mass of He = 4.00 g/mol

No. of moles of He needs to be added = 4.0 - 2.0 = 2.0 mol

Mass = No. of mole × Molar mass

= 2.0 × 4.0

= 8.0 g

3 0

4 years ago