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2 years ago

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1. How is different kind of molecules different? And similar?

2 answers:

Dafna1 [17]2 years ago

6 0

I agree with the person above me lol

dexar [7]2 years ago

5 0

Answer:

1.Molecules are made of atoms. So different molecules can have different (or same) number of atoms they are made of.Different atoms are made of different number of protons of neutrons in the nucleus (also electrons around the nucleus but they are very small even compared to atom and don’t add up for volume or mass) therefore their radius and mass are different.

2.Chromatography works because of differences in the properties of molecules in materials.some molecules differ in shape and size. These differences in molecular properties allow scientists to separate compounds into individual molecules using chromatography.

Explanation:

hope this helps

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I need help with this i'm really dumb.<br> Balance<br> p4+o2 ----> p4o10

kogti [31]

Answer:

P4 + 5O2 → P4O10

Explanation:

White Phosphorus - P4

Dioxygen - O2

Tetraphosphorus Decaoxide - P4O10

4 0

4 years ago

For the transmutation

zepelin [54]

The answer is a 4^9Be

6 0

4 years ago

Benzene has a formula of C6H6 and a vapor pressure of 96.4 torr at 298 K. Toluene has a formula of C7H8 and a vapor pressure of

Slav-nsk [51]

Answer: The vapor pressure of the solution is 55.2 torr

Explanation:

$p_1=x_1p_1^0$ and $p_2=x_2P_2^0$

where, x = mole fraction in solution

$p^0$ = pressure in the pure state

According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_1+p_2$ $p_{total}=x_Ap_A^0+x_BP_B^0$

x = mole fraction = $\frac{\text {moles}}{\text {total moles}}$

Given : 299 g of toluene and 391 g of benzene.

moles of toluene = $\frac{\text{Given mass}}{\text {Molar mass}}=\frac{299g}{92g/mol}=3.25moles$

moles of benzene= $\frac{\text{Given mass}}{\text {Molar mass}}=\frac{391g}{78g/mol}=5.01moles$

Total moles = moles of solute (toluene) + moles of solvent (benzene) = 3.25 + 5.01 = 8.26

$x_{benzene}$ = mole fraction of benzene = $\frac{3.25}{8.26}=0.39$

$x_{toluene}$ =mole fraction of toluene = (1-0.39) = 0.61

$p_{benzene}^0=96.4torr$

$p_{toluene}^0=28.9torr$

$p_{total}=0.39\times 96.4+0.61\times 28.9=55.2torr$

Thus the vapor pressure of the solution is 55.5 torr

6 0

3 years ago

A student sets up the following equation...

Sphinxa [80]

Answer:

The answer to your question is given below

Explanation:

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

Concentration (g/mL) = 0.04 g/mL

Concentration (g/L) =?

We can convert g/mL to g/L by doing the following:

1 g/mL = 1000 g/L

Therefore,

0.04 g/mL = 0.04 g/mL × 1000 g/L / 1 g/mL

0.04 g/mL = 40 g/L

0.04 g/mL is equivalent to 40 g/L.

Thus, the concentration (g/L) is 40 g/L

3 0

3 years ago

Which of the following is not an example of weathering?

Rina8888 [55]

Answer:

Destruction of rocks at convergent boundaries

Explanation:

Duuuuuuuuude. Dude.

Let's think for a sec, because this confused me.

Acid rain is chemical weathering. It has acid in it, so it weathers rocks. (Ewwww.)

Frost wedging is a major duh, because frost can weather rocks.

Oxidation reactions are a yes yes because it becomes oxidized.

4 0

2 years ago