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3 years ago

List three factors thatinfluence the rate at whick dissolving occurs

1 answer:

5 0

1) Temperature (heat) of the solution
2) Concentration (amount) of both solvent (usually water) and solute (substance being dissolved by solvent)
3) Movement (kinetic energy) of the solution, as in shaking/stirring

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A sample of gas at 10.0 ATM and 5.0 °C increases in tempature of 35 °C. If the volume is unchanged, what is the new pressure?

agasfer [191]

Answer:

11.08 atm

Explanation:

From the question given above, the following data were obtained:

Initial pressure (P₁) = 10 atm

Initial temperature (T₁) = 5 °C

Final temperature (T₂) = 35 °C

Final pressure (P₂) =?

Volume = constant

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 5 °C

Initial temperature (T₁) = 5 °C + 273

Initial temperature (T₁) = 278 K

Final temperature (T₂) = 35 °C

Final temperature (T₂) = 35 °C + 273

Final temperature (T₂) = 308 K

Finally, we shall determine the final pressure of the gas as follow:

Initial pressure (P₁) = 10 atm

Initial temperature (T₁) = 278 K

Final temperature (T₂) = 308 K

Final pressure (P₂) =?

P₁/T₁ = P₂/T₂

10/278 = P₂/308

Cross multiply

278 × P₂ = 10 × 308

278 × P₂ = 3080

Divide both side by 278

P₂ = 3080 / 278

P₂ = 11.08 atm

Therefore, the final pressure of the gas is 11.08 atm

3 0

3 years ago

I AM GIVING 91 POINTS!!!!!!!!!!!!!!!!! PLZZZ HELP!!!!

Reptile [31]

The answer is a i believe

5 0

3 years ago

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Calculate the volume (in cm³) of 38.5 grams of platinum if the density of platinum is 21.5 g/cm³. Give your answer to 2 decimal

Gennadij [26K]

Answer:

$\boxed {\boxed {\sf v\approx 1.79 \ cm^3}}$

Explanation:

The formula of density is:

$d=\frac{m}{v}$

If the formula is rearranged for volume, it becomes:

$v=\frac{m}{d}$

The mass of the platinum is 38.5 grams.

The density is 21.5 grams per cubic centimeter.

$m=38.5 \ g \\d= 21.5 \ g/cm^3$

Substitute the values into the formula.

$v=\frac{38.5 \ g}{ 21.5 \ g/cm^3}$

Divide. Note that the grams (g) will cancel each other out.

$v=1.79069767 \ cm^3$

Round to 2 decimal places (hundredth place). The 0 in the thousandth place tells us to leave the 9 in the hundredth place.

$v\approx 1.79 \ cm^3$

The volume is about 1.79 cubic centimeters.

6 0

3 years ago

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What is the main function of starch in plants

galina1969 [7]

Explanation: it is formed by large number of glucose molecules joined to each other , then when cell need it is digested to produce glucose to be consumed by the cell to produce energy.

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3 years ago

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EASYYYYY!!!!!!!!

nlexa [21]

crop rotation, green manure, and bone meal

Explanation:

I just looked it up. hope it helps

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3 years ago