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madam [21]
4 years ago
13

Which statement about subatomic particles is true?

Chemistry
2 answers:
ad-work [718]4 years ago
4 0

Answer: Electrons are the subatomic particles with the smallest mass.

Explanation:

An atom is the smallest unit of a matter or substance. Every atom consists of three subatomic particles namely electrons, protons and neutrons.

Protons being positively charged and neutrons being electrically neutral are located in the center of an atom where mass of an atom is concentrated.  Both protons and neutrons have nearly same mass.

Atomic mass = Number of protons + Number of neutrons

Electrons being negatively charged are located outside the nucleus where they orbit in different energy levels around the nucleus. and have negligible mass compared to protons and neutrons.

adoni [48]4 years ago
3 0
Electrons are the subatomic particles with the smallest mass.

Neutrons have no charge and protons have a positive charge, both of their masses are equal. Electrons have a negative charge and have the least mass.

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2 years ago
Calculate the grams of sulfur dioxide, SO2, produced when a mixture of 35.0 g of carbon disulfide and 30.0 g of oxygen reacts. W
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Answer:

58.9g of SO2 is produced

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Explanation:

The burning of Carbon disulfide (CS2) in oxygen. gives the reaction:

CS2 (g) + 3O2 (g) → CO2 (g) + 2SO2 (g)

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Molar mass of O2 = 15.99 g/mol

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Number of moles of CS2 = 35g/ 76.139 g/mol =0.46 moles

Number of moles of O2 = 30g/15.999 g/mol =1.88 moles

From the chemical reaction

1 mole of CS2 react with 3 moles of O2 to give 2 moles of SO2

Thus 0.46 moles of CS2 reacts to form 2× 0.46 = 0.92 moles of SO2

Mass of SO2 produced = 0.92×64.07 = 58.9g of SO2 is produced

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4 0
4 years ago
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If a balloon containing 3000 L of gas at 39 C and 99 k Pa rises to an altitude where the pressure is 45.5 kPa and the temperatur
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