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Gnesinka [82]
3 years ago
14

An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to the righ

t. What is the displacement of the object? 1 5 7 13
Chemistry
2 answers:
DedPeter [7]3 years ago
8 0

Answer:

5

Explanation:

larisa [96]3 years ago
6 0

Answer:

5

Explanation:

Edge

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Answer: 0.07868 mol H₂O

Explanation:

1) Chemical equation:

Cu₂O +H₂ → 2Cu + H₂O

2) mole ratios:

1 mol Cu₂O : 1 mol H₂ : 2 mol Cu : 1 mol H₂O

3) Convert 10.00 g of Cu to grams, using the atomic mass:

Atomic mass of Cu: 63.546 g/mol

number of moles = mass in grams / atomic mass = 10.00g / 63.546 g/mol

number of moles = 0.1574 mol

4) Use proportions

2mol Cu           0.1574 mol Cu
--------------- =  ---------------------
1 mol H₂O                   x

⇒ x = 0.1574 mol Cu × 1 mol H₂O / 2mol Cu = 0.07868 mol H₂O

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