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SpyIntel [72]
3 years ago
5

Which of the following can be achieved by using a visible-light spectrophotometer?

Chemistry
1 answer:
gulaghasi [49]3 years ago
5 0
1 and 2 i think this is the answer 
thnx u 

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Molecule contains carbon, hydrogen and sulfur atoms. When a sample of 0.535g of this compound is burnt in oxygen, 1.119 g of CO2
OLga [1]

Answer:

The empirical formula is, C4H4S

Explanation:

Number of moles of carbon = 1.119 g/ 44g/mol = 0.025 moles

Mass of Carbon= 0.025 moles × 12 g/ mole = 0.3 g

Number of moles of hydrogen = 0.229/18g/mol × 2 = 0.025 moles

Mass of hydrogen = 0.025 moles × 1 = 0.025 g

Number of moles of sulphur = 0.407g/ 64 g/mol = 0.0064 moles

Mass of sulphur= 0.0064 moles ×32 = 0.2 g

Now we obtain the mole ratios by dividing through by the lowest ratio.

C- 0.025 moles/ 0.0064 moles, H- 0.025 moles/ 0.0064 moles, S- 0.0064 moles/0.0064 moles

C4H4S

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How many significant figures are in this number?<br> 9.678 grams
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There are 4 of them
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The total number of electrons in one mole of fluorine molecules (F2) is
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Has 9 protons and 9 electrons in per atom.........
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When a substance goes from a gas to a liquid, it goes through a ________ change. chemical phase bond nuclear
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It goes through a chemical bond
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A newborn eats 8 times a day. At each feeding, he eats 2.5 ounces of formula. How many days would it take to eat 100 ounces
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Answer:

It would take 5 days

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1. 2.5 times 8 is 20 ounces

2. 2.5 times 16 is 40 ounces

3. 2.5 times 24 is 60 ounces

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5. 2.5 times 40 is 100 ounces

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3 years ago
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