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saveliy_v [14]
2 years ago
10

Consultați sistemul periodic și aranjați în ordinea creșterii caracterului nemetalic următoarele elemente:

Chemistry
1 answer:
lukranit [14]2 years ago
7 0
I’m sorry I just really need points rn I love you
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During a lab experiment, Mandy and her lab partner work with corrosive chemical substances. What is the proper way to dispose of
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What’s the difference between attractive forces and covalent bonds
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3 years ago
Calculate the mass in grams of benzophenone required to make a solution of 2.5 mmoles
kirill115 [55]

Answer:

0.46 grams (C₆H₅)₂CO

Explanation:

To find the mass of benzophenone ((C₆H₅)₂CO), you need to (1) convert mmoles to moles and then (2) convert moles to grams (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units. The final answer should have 2 sig figs to match the sig figs of the given value (2.5 mmoles).

Molar Mass ((C₆H₅)₂CO): 13(12.011 g/mol) + 10(1.008 g/mol) + 15.998 g/mol

Molar Mass ((C₆H₅)₂CO): 182.221 g/mol

2.5 mmoles (C₆H₅)₂CO               1 mole                  182.221 g
-----------------------------------  x  ------------------------  x  -------------------  =
                                                1,000 mmoles            1 mole

=  0.46 grams (C₆H₅)₂CO

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Calculate the numbers of mL in 0.603 L
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603 mL

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