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MAXImum [283]
2 years ago
15

An atom was observed with +3 charge, n = 38, and e = 28. What is the mass number of the atom?

Chemistry
1 answer:
Finger [1]2 years ago
3 0

Answer: 66

Explanation: To find the mass number you would have to add the number of protons and the number of neutrons.

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Using the balanced equation below, how many moles of water can be produced when 4 grams of Hydrogen react? 2H2(g)+O2(g) —> 2H
gavmur [86]

Answer:

4 × 10 g

Explanation:

Step 1: Write the balanced equation

2 H₂(g) + O₂(g) ⇒ 2 H₂O(I)

Step 2: Calculate the moles corresponding to 4 g of H₂

The molar mass of H₂ is 2.02 g/mol.

4 g × 1 mol/2.02 g = 2 mol

Step 3: Calculate the moles of H₂O produced from 2 moles of H₂

The molar ratio of H₂ to H₂O is 2:2. The moles of H₂O produced are 2/2 × 2 mol = 2 mol.

Step 4: Calculate the mass corresponding to 2 moles of H₂O

The molar mass of H₂O is 18.02 g/mol.

2 mol × 18.02 g/mol = 4 × 10 g

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Angelina_Jolie [31]

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Explanation:

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3 years ago
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gavmur [86]

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Explanation:

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