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viva [34]
3 years ago
8

Please help me out with this question if you help me I will give you the brain thing and extra points. 5/9 image below.

Chemistry
2 answers:
Umnica [9.8K]3 years ago
7 0
Yeah what they said^
nikklg [1K]3 years ago
4 0

Answer:

Third Law of motion. (answer C)

Explanation:

This is an example of Newton's Third Law of motion which normally translates into Action/Reaction. That is : the expelled air exerts a force in the direction opposite to that of the motion of the air that goes out. It is the same as propulsion in a rocket.

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What is the pressure in millimeters of mercury of 0.0130 molmol of helium gas with a volume of 210. mLmL at 55 ∘C∘C? (Hint: You
juin [17]

Answer : The pressure of the helium gas is, 1269.2 mmHg

Explanation :

To calculate the pressure of the gas we are using ideal gas equation:

PV=nRT

where,

P = Pressure of He gas = ?

V = Volume of He gas = 210. mL = 0.210 L    (1 L = 1000 mL)

n = number of moles He = 0.0130 mole

R = Gas constant = 0.0821L.atm/mol.K

T = Temperature of He gas = 55^oC=273+55=328K

Putting values in above equation, we get:

P\times 0.210L=0.0130mole\times (0.0821L.atm/mol.K)\times 328K

P=1.67atm=1269.2mmHg

Conversion used : (1 atm = 760 mmHg)

Thus, the pressure of the helium gas is, 1269.2 mmHg

4 0
3 years ago
What is the only nonmetal in group 14?
Fantom [35]

Answer:

The only nonmetal in group 14 is carbon.

Explanation:

7 0
3 years ago
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A sample of carbon-12 has a mass of 6.00 g. How many atoms of carbon-12 are in the sample?
Bingel [31]
Carbon molar mass=12
carbon mass in the above question =6
mole=number of atoms/6.02x10²³
6/12= number of atoms/6.02x10²³
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number of atoms= 6.02 x10²³/2
number of atoms=3.01x10²³
4 0
3 years ago
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Answer:

Protons= Positive charge

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electrons= negative charge

Protons and neutrons make up nucleus

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Explanation:

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fenix001 [56]
The rates of the forward and reverse reaction depends on the temperature on which the reaction will proceed, either endothermic of exothermic. it also depends of the concentration of the reactants and products. if the reaction is exothermic, so if the reaction temperature is increased then it will favor the forward reaction, then if the reaction is lowered then it will favor the reverse reaction
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