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3 years ago

Heliocentric theory:

Chemistry

1 answer:

Juliette [100K]3 years ago

7 0

All of th above support the heliocentric theory.

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assuming nitrogen behaves like an ideal gas, what volume would 14.0 g of nitrogen gas (N2) occupy at STP? the gas constant is 0.

dimaraw [331]

Answer:

V = 22.41 L

Explanation:

Given data:

Mass of nitrogen = 14.0 g

Volume of gas at STP = ?

Gas constant = 0.0821 atm.L/mol.K

Solution:

Number of moles of gas:

Number of moles = mass/molar mass

Number of moles= 14 g/ 14 g/mol

Number of moles = 1 mol

Volume of gas:

PV = nRT

1 atm × V = 1 mol × 0.0821 atm.L/mol.K × 273 K

V = 22.41 atm.L / 1 atm

V = 22.41 L

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3 years ago

What is the last step in the scientific method?

nataly862011 [7]

Answer:

Explanation:

Because do all of that and then you do a conclusion

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3 years ago

What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? As air

Marina86 [1]

We need to know the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure.

The relationship is: As air pressure in an area increases, the density of the gas particles in that area increases.

For any gaseous substance, density of gas is directly proportional to pressure of gas.

This can be explained from idial gas edquation:

PV=nRT

PV= $\frac{w}{M}$ RT [where, w= mass of substance, M=molar mass of substance]

PM= $\frac{w}{V}$ RT

PM=dRT [where, d=density of thesubstance]

So, for a particular gaseous substance (whose molar mass is known), at particular temperature, pressure is directly related to density of gaseous substance.

Therefore, as air pressure in an area increases, the density of the gas particles in that area increases.

3 0

3 years ago

A neutral pH level is _____. 5 7 8

love history [14]

Neutral pH is level 7

5 0

3 years ago

If a bus traveled 20 miles north on a straight path, and then traveled 20 miles back to the starting point, what would the veloc

AleksAgata [21]

Answer:

The velocity of the bus be is 0 miles/second

Explanation:

Given, a bus travelled a distance of 20 miles north and 20 miles back to the starting point

Hence, total distance = 20 + 20 = 40 miles

Velocity is calculated by the formula:

Velocity = $\frac{\text { Displacement }}{\text { Time }}$

Displacement = $20+(-20)=0 \text { miles }$

Velocity = $\frac{0}{T i m e}=0 \text { miles/second }$

Therefore, the velocity of the bus is 0 miles/second

5 0

3 years ago