Ques: Q: In order to determine its molecular formula, it is necessary to know what about the compound? Choices: - lipid mass - polar mass - protons mass - molar mass A:
Ans: molar mass

Ques: Q: When cardiac muscle contracts, the heart does what? Choices: - cardiac arrest - irregular heartbeat - heart murmur - pumps blood A:
Ans: pumps blood

Ques: Q: What part of an atom is electrically neutral? Choices: - protons - electrons - newtons - neutrons A:
Ans: neutrons

Ques: Q: What do people apply to their lawns that causes water pollution? Choices: - seeds - manure - water - chemicals A:
Ans:
chemicals