Ques:Answer the following question given this paragraph: As you learned in Chapter 1 "Introduction to Chemistry", the mass number is the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is an integer that is approximately equal to the numerical value of the atomic mass. Although the mass number is unitless, it is assigned units called atomic mass. Q: What number is the sum of the numbers of protons and neutrons present in the nucleus of an atom? Choices: - nuclear number - combined number - mass total - mass number A:

Ans:mass number
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Ques:Answer the following question given this paragraph: chloride, NaCl. When Na 2 HPO 24 (the weak acid) comes into contact with a strong base, such as sodium hydroxide (NaOH), the weak acid reverts back to the weak base and produces water. Acids and bases are still present, but they hold onto the ions. Q: When na 2 hpo 24 (the weak acid) comes into contact with a strong base, such as sodium hydroxide (naoh), the weak acid reverts back to the weak base and produces what? Choices: - rock - plasma - air - water A:

Ans:water
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Ques:Answer the following question given this paragraph: Reproduction of Green Algae Green algae reproduce both asexually, by fragmentation or dispersal of spores, or sexually, by producing gametes that fuse during fertilization. In a single-celled organism such as Chlamydomonas, there is no mitosis after fertilization. In the multicellular Ulva, a sporophyte grows by mitosis after fertilization. Both Chlamydomonas and Ulva produce flagellated gametes. Q: In a single-celled organism such as chlamydomonas, there is no what after fertilization? Choices: - germination - spawning - meiosis - mitosis A:

Ans:mitosis
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Ques:Answer the following question given this paragraph: Q: What class of animal, including hydras and jellies, is considered the simplest to contain a nervous system? Choices: - fish - sponges - prokaryotes - cnidarians A:

Ans:
cnidarians
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