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Lina20 [59]
3 years ago
12

Can lead replace iron?

Chemistry
2 answers:
Dima020 [189]3 years ago
4 0

Answer:

no

Explanation:

because lead is more breakable and iron is more stronger

kakasveta [241]3 years ago
3 0

Answer:

no

Explanation:

no because iron is stronger than lead

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A sample of dry gas weighing 2.1025 g is found to occupy 2.850 L at 22.0oC and 740.0 mm Hg. How many moles of gas are present?
soldi70 [24.7K]

0.11 moles of the gas are present in the sample of dry gas.

Explanation:

Data given:

mass of the gas  = 2.1025 grams

volume of the gas = 2.850 litres

temperature =  22 degrees (273.15+22) = 295.15 K

Pressure = 740 mm Hg or 0.973 atm

moles of the gas =?

R = 0.08206 atmL/Mole K

From the ideal gas law the number of moles can be calculated in the sample of dry gas. Number of moles will be determined by the pressure exerted, volume and temperature of the gas.

The formula:

PV = nRT

n = \frac{PV}{RT}

putting the values in the above equation:

n = \frac{2.850 x 0.973}{0.08206 X 295.15}

  = 0.11 moles

0.11 moles of the dry gas is present in the sample given.

4 0
3 years ago
Identify the Lewis acid and Lewis base from among the reactants in each of the following equations.
Alex

Answer:

Part A

Ag+ is the Lewis acid and NH3 is the Lewis base.

Part B

AlBr3 is the Lewis acid and NH3 is the Lewis base.

Part C

AlCl3 is the Lewis acid and Cl− is the Lewis base.

Explanation:

A Lewis acid is any specie that accepts a lone pair of electrons. Ag^+, AlBr3 and AlCl3 all accepted lone pairs of electrons according to the three chemical reaction equations shown. Hence, they are Lewis acids.

A Lewis base donates a lone pair of electrons. They include neutral molecules having lone pair of electrons such as NH3 or negative ions such as Cl- .

3 0
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Ba(NO3)2<br> What’s the atomic mass
Ahat [919]

Answer:

261.337 g/mol

Explanation:

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A ball is thrown at a reflecting surface (mirror) as shown. A video camera is placed in line with the reflected path of the ball
Oksanka [162]

Explanation:

The video camera will record

A ball moving towards the camera, initially faster and then slower.  

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3 years ago
Science does not include<br><br> beliefs or opinions<br> theories<br> laws<br> conclusions
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