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Jobisdone [24]
2 years ago
7

Sandy heated 20 grams of liquid hydrogen peroxide until it was completely broken down into liquid water and oxygen gas. Which of

these best describes the total mass of water and oxygen that was produced?
A more than 20 grams since heat was added
B 20 grams since no matter was added or removed
C less than 20 grams since oxygen gas is very light
D more than 20 grams since there are two new substances
Chemistry
1 answer:
laila [671]2 years ago
4 0
ANSWER: B. 20 grams since no matter was added or removed

Hope it helps!
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Iodine has a lower atomic weight than tellurium (126.90 for I, 127.60 for Te) even though it has a higher atomic number (53 for
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Answer and Explanation:

Iodine have lower atomic mass than tellurium even though the atomic number of iodine is more than the atomic number of tellurium

This is because the atomic weight of any element is the sum of number of proton and number of neutron, even though the number of proton in iodine is more so but the number of neutron is less as compared to tellurium which makes the tellurium of high atomic mass

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2 years ago
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Joyce poured 200 milliliters (mL) of water into a beaker, placed a thermometer in it, and heated it until it started to boil. Sh
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Answer:

100°C

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If you gently shake a carbon dioxide fire extinguisher, you will feel the presence of liquid within the extinguisher What condit
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When we wish to convert a gas to liquid we have to either

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2 years ago
Partitioning of toxic chemicals in the environment refers to:
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Answer:

The correct answer is b movement between different compartments(Such as between water and air).

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3 0
2 years ago
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Answer:

21.86582KJ

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2 years ago
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