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3 years ago

Ex1. An atom has atomic number Z = 6 and mass number A = 12. Establish:

Physics

1 answer:

Maksim231197 [3]3 years ago

7 0

Answer:

Ex1.

a) Carbon : atomic number Z = 6 and mass number A = 12

b) Protons = 6; electrons = 6 ; neutrons = 6.

Ex2.

Molar mass of H₂O₂ = 34 g; BaF = 156 g; CO = 28 g.

Explanation:

Ex1.

a) the element with atomic number 6 and mass number 12 is carbon

b) number of protons and electrons in a element is given by its atomic number; and for neutrons its mass number - atomic number (A-Z).

⇒ protons = Z = 6; electrons = Z = 6.; neutrons = A-Z = 12-6 = 6.

Ex2.

Molecular formula of hydrogen peroxide is given by H₂O₂.

⇒ molar mass = 2×mass of hydrogen + 2×mass of oxygen

⇒ molar mass = 2×1 + 2×16 = 34.g

molar mass of BaF = mass of barium + mass of fluoride.

= 137 + 19 = 156 g

molar mass of CO = mass of carbon + mass of oxygen

= 12 + 16 = 28 g

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Explanation:

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2 years ago

If the AMA of the inclined plane below is 2, calculate the IMA and efficiency. IMA = Efficiency =

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Answer:

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Explanation:

The AMA of a machine is referred to as the Actual Mechanical Advantage of a machine, calculated as the ratio of the output to the input force.

The Ideal Mechanical Advantage is the ratio of the input distance to the output distance.

From the diagram, the input distance which is also the distance moved by effort = 5metres

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3 years ago

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Answer:

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3 years ago

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Aleonysh [2.5K]

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