Pick one of the models that is an ion, explain your answer

What is the volume of 1g of ice in cm3?

Amanda [17]

Answer:

What is the volume of 1g of ice in cm3?

Explanation:

3 0

3 years ago

Animals need various nutrients in order to live and grow. Nitrogen, for example, is a nutrient that is needed to form molecules

Ad libitum [116K]

Answer:

It's A

Explanation:

Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.

8 0

3 years ago

How reliable is the perfect gas law in comparison with the van der waals equation?calculate the difference in pressure of 10.00g

Semmy [17]

Answer:

The perfect gas law is reliable at the limit of pressure tending to zero. That is to say, at low pressure. The Van der Waals law instead can be used at higher pressures.

Explanation:

The perfect law equation is

$P.V = n.R.T$

The perfect gas law considers that the gas molecules have no interaction between each other and each molecule has null volume. This condition happens at the limit of pressure tending to zero.

The Van der Waals equation is

$(P +\frac{n^{2}.a}{V^{2}})(V-n.b) = n.R.T$

On the other hand, the Van der Waals law has two extra terms, one to consider the interaction of the molecules (n2a/V2) and other to consider the volume of the molecules (V-nb). These terms make a better approximation to a real gas.

Using the two equations to calculate the pressure (P) for CO2 with

V = 100cm3 = 0.1L

T = 25ºC = 298K

n = 10g/(44g/mol) = 0.23mol

a = 3.658 atm.L2/mol2

b = 0.0429 L/mol

With the perfect law equation:

$P = \frac{n.R.T}{V} = \frac{0.23molx0.082\frac{atm.L}{K.mol}x298K }{0.1L} = 56.2atm$

With the Van del Waals law:

$P = \frac{n.R.T}{V-n.b} -\frac{n^{2}.a}{V^{2} }$

$P = \frac{0.23molx0.082\frac{atm.L}{K.mol}x298K}{0.1L - 0.23molx0.0429\frac{L}{mol} }-\frac{(0.23mol)^{2}x3.658\frac{atm.L^{2}}{mol^{2}}}{(0.1L)^{2}} = 43 atm$

At this case the difference between the results of the two equations is due to the big mass of CO2 which produce a high pressure.

8 0

3 years ago

Juan made the following bar graph shown to represent the relative distances of four different astronomical bodies from Earth. Th

NikAS [45]

I believe bar C would be Mercury and bar B would be jupiter. I'm not to sure on this it could be wrong, it would help if i could see the graph but anyway i hope this helps you. :)

5 0

3 years ago

Aerosol can carry warnings on their labels that say not to incinerate (burn) them or store the cans above a certain temperature.

sineoko [7]

Answer:

Aerosol cans carry warnings on their labels that say not to incinerate (burn) them or store the cans above a certain temperature. This problem will sho why it is dangerous to dispose of aerosol cans in a fire. The sa in a used aerosol can is at a pressure of 103 kPa at 25℃.

Hope this helps!!

Good luck!

5 0

3 years ago