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AysviL [449]
3 years ago
14

HELP PLEASE I GIVE 15 POINTS +++ BRAINLIEST!!!!!!!

Chemistry
1 answer:
Naddika [18.5K]3 years ago
6 0
Synthesis- compounds combine  vs. Decomposition-compounds break down (separate)
Synthesis-form a more complex substance vs. Decomposition-form a more simple substance
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Which two notations represent isotopes of the same element
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3 years ago
Read 2 more answers
In a constant‑pressure calorimeter, 60.0 mL of 0.300 M Ba ( OH ) 2 was added to 60.0 mL of 0.600 M HCl . The reaction caused the
densk [106]

Answer:

Q sln = 75.165 J

Explanation:

a constant pressure calorimeter:

  • Q sln = mCΔT

∴ m sln = m Ba(OH)2 + m HCl

∴ molar mass Ba(OH)2 = 171.34 g/mol

∴ mol Ba(OH)2 = (0.06 L)(0.3 mol/L) = 0.018 mol

⇒ mass Ba(OH)2 = (0.018 mol)(171.34 g/mol) = 3.084 g

∴ molar mass HCl = 36.46 g/mol

∴ mol HCl = (0.06 L)(0.60 mol/L) = 0.036 mol

⇒ mass HCl = (0.036 mol)(36.46 g/mol) = 1.313 g

⇒ m sln = 3.084 g + 1.313 g = 4.3966 g

specific heat (C):

∴ C sln = C H2O = 4.18 J/g°C

∴ ΔT = 26.83°C - 22.74°C = 4.09°C

heat absorbed (Q):

⇒ Q sln = (4.3966 g)(4.18 J/g°C)(4.09°C)

⇒ Q sln = 75.165 J

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A clear liquid in an open container is allowed to evaporate. After three days, a solid is left in the container. Was the clear
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The liquid did not chemically bond after 3 days, therefor it is a mixture.

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7 0
2 years ago
14. The following are a list of the four parts of John Dalton's atomic theory Indicate which of
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1

all matter is made of tiny particles called atom

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