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kotegsom [21]
3 years ago
13

Which of the following measurements is expressed to three significant figures?

Chemistry
1 answer:
tiny-mole [99]3 years ago
8 0
D. is the answer
hope i could help
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If a proton and an electron are released when they are 5.50×10−10 mm apart (typical atomic distances), find the initial accelera
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Answer: The initial acceleration of the proton = (4.56 × 10^23) m/s2

The initial acceleration of the electron = (8.36 × 10^26) m/s2

Explanation: The force of attraction between the proton and electron can be computed using the statements of Coulomb's law which state that the force of attraction between two charged particles is directly proportional to the product of the two charges and inversely proportional to the square of their distances apart.

F = (Kq1q2)/(r^2) where K = (9 × (10^9) Nm(C^-2))

But q1 is the charge on a proton = (1.6 × (10^-19)) C

q2 is charge on an electron = -(1.6 × (10^-19)) C

r = (5.50 × (10^-10))mm = (5.50 × (10^-13))m

Computing all that, F = 0.0007616529 N = (7.62 × 10^-4) N

But the force of attraction is converted to that required for motion when they're released.

F = ma.

For proton, m = (1.67 × 10^-27) kg

a = F/m = 0.000762/(1.67 × 10^-27) = (4.56 × 10^23) m/s2

For electron, m = (9.11 × 10^-31) kg

a = F/m = 0.000762/(9.11 × 10^-31) = (8.36 × 10^26) m/s2

QED!

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3 years ago
A chemical reaction takes place in which energy is released. Arrange the reaction’s characteristics in order from start to finis
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Answer the question below pls
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The answer would be at 120°C

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If I add 5.0 mL of water to 8.0 mL of a 6.0M NaOH solution, what
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When balance the following chemical equations N2+O2= NO2 the coefficient for O2 is
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2

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balance

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