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Serggg [28]
3 years ago
6

Help omgggg. Timed test need answers ASAP

Chemistry
1 answer:
topjm [15]3 years ago
6 0

Answer: X2Y5

Explanation:

X has 2 dots and Y has 5 dots

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Classify the following statements as observation, inference, prediction, measuring or classifying
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How many moles of Au2S3 is required to form 56 grams of H2S at STP?
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Answer:

0.55 mol Au₂S₃

Explanation:

Normally, we would need a balanced equation with masses, moles, and molar masses, but we can get by with a partial equation, if the S atoms are balanced.

1. Gather all the information in one place:

M_r:                          34.08

          Au₂S₃ + … ⟶ 3H₂S + …  

m/g:                             56  

2. Calculate the moles of H₂S

Moles of H₂S = 56 g H₂S × (34.08 g H₂S/1 mol H₂S)

                      = 1.64 mol H₂S

3. Calculate the moles of Au₂S₃

The molar ratio is 1 mol Au₂S₃/3 mol H₂S.

Moles of Au₂S₃ = 1.64 mol H₂S × (1 mol Au₂S₃/3 mol H₂S)

                         = 0.55 mol Au₂S₃

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4 years ago
The central core of an atom is called the __?
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(Yes, it was from google.)

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the correct answer is

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4 years ago
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