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Lostsunrise [7]
3 years ago
13

A certain atom contains 53 protons, 66 neutrons, and 51 electrons. What is the mass number of this atom?

Chemistry
1 answer:
xeze [42]3 years ago
3 0

Answer:

The mass number of an element is the sum of protons and neutrons.

Hence, 53+66 =119

The mass number of the atom is 119.

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8 0
2 years ago
The hydrochloride form of cocaine has a solubility of 1.00 g in 0.400 mL water. Calculate the molarity of a saturated solution o
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Answer:

The molarity of the solution is 7.4 mol/L

Explanation:

From the question above

0.400 ml of water contains 1.00 g of hydrochloride form of cocaine

Therefore 1000 ml of water will contain x g of hydrochloride form of cocaine

                    x = 1000 / 0.400

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Mole of hydrochloride form of cocaine = 2500/339.8

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molarity = 7.4 /1

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3 years ago
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