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vladimir2022 [97]
3 years ago
10

PLS HELP I WILL MARK BRAINLYEST BUT PLS JUST HELP MEEEEEEEEEEEEEE

Chemistry
2 answers:
VLD [36.1K]3 years ago
8 0

Answer:

hi kirishima it is me 0412919

Explanation:

i will give u brainly :D

Irina-Kira [14]3 years ago
3 0

Answer:

Radio waves are electromagnetic waves within the frequencies 30KHz - 300GHz, and include microwaves. Microwaves are at the higher frequency end of the radio wave band and low frequency radio waves are at the lower frequency end.

Explanation:

hope this helps and i hope i can please get brainliest

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Which of the following would be found ONLY in plant cells
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Answer:

chloroplasts, cell walls, or intracellular vacuoles

Explanation:

You didn't list the following, but I'm guessing it is chloroplasts, cell walls, or intracellular vacuoles

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3 years ago
What happens when an acid reacts with a base?
shepuryov [24]

Answer:

They neutralize each other

3 0
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the density of water at different temperature is listed in the table above. Based on this information we can predict that the de
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What is the pH of a solution whose hydronium ion [H20+] (or proton [H+1)
pav-90 [236]

Answer:

pH =  -  log(7.6 \times  {10}^{ - 5} )  \\ pH = 4.12

8 0
3 years ago
How many joules of heat must be absorbed by 500g h2O @ 50CELCIUS to convert to steam @ 120 celcius?
nadya68 [22]

Answer:

Q = 1267720 J

Explanation:

  • Qt = QH2O + ΔHv

∴ QH2O = mCpΔT

∴ m H2O = 500 g

∴ Cp H2O = 4.186 J/g°C = 4.183 E-3 KJ/g°C

∴ ΔT = 120 - 50 = 70°C

⇒ QH2O = (500 g)(4.183 E-3 KJ/g°C)(70°C) = 146.51 KJ

∴ ΔHv H2O = 40.7 KJ/mol

moles H2O:

∴ mm H2O = 18.015 g/mol

⇒ moles H2O = (500 g)(mol/18.015 g) = 27.548 mol H2O

⇒ ΔHv H2O = (40.7 KJ/mol)(27.548 mol) = 1121.21 KJ

⇒ Qt = 146.51 KJ + 1121.21 KJ = 1267.72 KJ = 1267720 J

5 0
3 years ago
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