3 years ago

What information would b requird to determine the mass of nitrogen (n)?

Chemistry

1 answer:

oee [108]3 years ago

5 0

7 protons and 7 neutrons

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Which element x or y has more protons, assume both have the same energy level?

mamaluj [8]

Which has less atomic radius

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3 years ago

A particle has a mass of 2 × 10-30 kg and an uncertainty in its velocity of 102 m/s. What is the minimum possible uncertainty in

notka56 [123]

m = mass of the particle = 2 x 10⁻³⁰ kg

Δv = uncertainty in velocity of the particle = 10² m/s

Δx = uncertainty in position of the particle = ?

h = plank's constant = 6.63 x 10⁻³⁴ J-s

uncertainty principle is given as

m Δx Δv ≥ h/(4π)

inserting the values

(2 x 10⁻³⁰) Δx (10²) ≥ (6.63 x 10⁻³⁴)/(4(3.14))

Δx ≥ 2.64 x 10⁻⁷ m

so minimum possible uncertainty is 2.64 x 10⁻⁷ m

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3 years ago

True or false: different substances are made up of different types of atoms

Degger [83]

I would definitely say that's false.

hope this helps you!:-)

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2 years ago

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Gaseous hydrogen and oxygen can be prepared in the laboratory from the decomposition of gaseous water. The equation for the reac

nata0808 [166]

Answer:

$m_{O_2}=87.2gO_2$

Explanation:

Hello.

In this case, given the chemical reaction, we can compute the grams of oxygen by using the 98.2 g of water via the 2:1 mole ratio between them, the molar mass of water that is 18.02 g/mol, the molar mass of gaseous oxygen that is 32.00 g/mol and the following stoichiometric procedure relating the given information:

$m_{O_2}=98.2gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{1molO_2}{2molH_2O}*\frac{32.00gO_2}{1molO_2} \\\\m_{O_2}=87.2gO_2$

In which the result is displayed with three significant figures because the given mass of water 98.2 g, has three significant figures too.

Best regards!

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2 years ago

MARK ALL of the objects that can be found in our Solar System

lapo4ka [179]

Answer A E F C

Explanation: star, planets, moons, dwarf planets, comets, asteroids, gas, and dust.

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3 years ago

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