4 years ago

OCAS GAME

1 answer:

7 0

ok so this was really confusing, but i think i know the answer. D. ...hairy and ancient hermit crabs and swift, darting minnows and sometimes a

crumbling sand dollar.

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if the density of copper is 8.9g/cm^3 and the Volume of the sample is 23.4 mL what would be the mass?

Black_prince [1.1K]

Answer:

The mass of copper = 208.26 grams.

Explanation:

Density = mass / volume

8.9 = mass / 23.4

mass = 8.9 * 23.4

= 208.26 grams.

8 0

3 years ago

Which best describes the transition from gas to liquid?

Nina [5.8K]

A - its condensation and gas particles have a higher kinetic energy

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3 years ago

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Calculate the equilibrium constant at 298 K for the reaction of formaldehyde (CH2O) with hydrogen gas using the following inform

Mariana [72]

Answer:

E. 8.08 x 10⁴.

Explanation:

Hello,

In this case, for the reaction:

$CH_2O(g) + 2H_2(g) \rightleftharpoons CH_4(g) + H_2O(g)$

We can compute the Gibbs free energy of reaction via:

$\Delta G\°=\Delta H\°-T\Delta S\°$

Since both the entropy and enthalpy of reaction are given at 298 K (standard temperature), therefore:

$\Delta G\°=-94.9kJ-(298K)(-224.2\frac{J}{K}*\frac{1kJ}{1000kJ} )\\\\\Delta G\°=-28.1kJ$

Then, as the equilibrium constant is computed as:

$K=exp(-\frac{\Delta G\°}{RT} )$

We obtain:

$K=exp(-\frac{-28.1kJ/mol}{8.314x10^{-3}\frac{kJ}{mol* K}}*298K )\\\\K=8.08 x10^4$

For which the answer is E. 8.08 x 10⁴.

Best regards,

3 0

4 years ago

Salt water is classified as a __________ and a solution. compound mixture

REY [17]

Answer: compound

Explanation: because the hydrogen molecules and the oxygen molecules are chemically bonded together unlike in a mixture

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3 years ago

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Increasing temperature can increae the number of protons true or false

Lapatulllka [165]

False it just makes them move faster

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3 years ago