Physics, 18.10.2020 14:01 Tiffanyv1262
When a physical or chemical change occurs, the law of conservation of mass always applies. What happens to the atoms during a chemical change, according to this law?
Group of answer choices
Atoms disappear
Atoms are created.
Atoms are destroyed.
Atoms are rearranged.
Answers: 2
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Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?
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An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
Answers: 1
When a physical or chemical change occurs, the law of conservation of mass always applies. What happ...
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