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dimaraw [331]
3 years ago
14

SOMEONE HELP ME PLEASE I’LL GIVE BRAINLY Chemical change physical change

Chemistry
1 answer:
yaroslaw [1]3 years ago
3 0

Answer:

Chemical

Explanation:

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10. If 3.5 kJ of energy are added to a 28.2 g sample of iron at 20°C, what
igor_vitrenko [27]

Answer:

569K

Explanation:

Q = 3.5kJ = 3500J

mass = 28.2g

∅1 = 20°C = 20 + 273 = 293K

∅2 = x

c = 0.449

Q = mc∆∅

3500 = 28.2×0.449×∆∅

3500 = 12.6618×∆∅

∆∅ = 3500/12.6618

∆∅ = 276.4220

∅2 - ∅1 = 276.4220

∅2 = 276.4220 + ∅1

∅2 = 276.4220 + 293

∅2 = 569.4220K

∅2 = 569K

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What is formed when amino acids form long chains or polymerize
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They create proteins!
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Which of the following happens to a molecule of an object when the object is heated? (1 point)
vfiekz [6]

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They get more energy, so they vibrate!

Explanation:

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3 years ago
Please solve this for 13 points
Anit [1.1K]

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sodium

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