{"id":120033,"date":"2023-09-20T03:32:25","date_gmt":"2023-09-20T03:32:25","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=120033"},"modified":"2023-09-20T03:32:27","modified_gmt":"2023-09-20T03:32:27","slug":"hesi-a2-entrance-exam-2023-questions-with-answers-chemistry","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2023\/09\/20\/hesi-a2-entrance-exam-2023-questions-with-answers-chemistry\/","title":{"rendered":"HESI A2 ENTRANCE EXAM 2023 QUESTIONS WITH ANSWERS CHEMISTRY"},"content":{"rendered":"\n

HESI A2 CHEMISTRY V1\/V2 FILE<\/p>\n\n\n\n

    \n
  1. If a Hydrogen is in a compound, what would its oxidation number be? +1<\/li>\n\n\n\n
  2. What is the oxidation number of any simple ion?
    +1 or -1 depending on the charge of the ion<\/li>\n\n\n\n
  3. How many kilograms are in a pound?
    0.453592 kg<\/li>\n\n\n\n
  4. What is the temperature for freezing point of water in Celsius?
    0 degrees Celsius (32\u00b0F for Fahrenheit)<\/li>\n\n\n\n
  5. What is the conversion of Celsius to Fahrenheit?
    0\u00b0C = 32\u00b0F<\/li>\n\n\n\n
  6. What is the oxidation number of an element atom?
    0<\/li>\n\n\n\n
  7. What is the freezing point of sea water in Fahrenheit? 0\u00b0F<\/li>\n\n\n\n
  8. How many amino acids are in a dipeptide?
    2<\/li>\n\n\n\n
  9. If Oxygen is in a compound, what would its oxidation number be?
    -2<\/li>\n\n\n\n
  10. Which of the following pH values would lemon juice likely have?
    2 because the lower the pH value, the more acidic<\/li>\n\n\n\n
  11. What is a pentose?
    A 5 carbon sugar (Pent = 5) (ose = sugar)<\/li>\n\n\n\n
  12. What is the oxidation state of the Sulfur atom in Sulfuric Acid H2SO4? 6<\/li>\n\n\n\n
  13. How many neutrons does carbon 14 have?
    8 ( mass# – atomics # = neutrons) 14 – 6 = 8<\/li>\n\n\n\n
  14. How many protons does Potassium have?
    19<\/li>\n\n\n\n
  15. How many amino acids are essential for human life?
    20 amino acids<\/li>\n\n\n\n
  16. Normal body temperature in \u00b0C? 37\u00b0C<\/li>\n\n\n\n
  17. Normal body temperature in \u00b0F?
    98.6\u00b0F<\/li>\n\n\n\n
  18. Boiling point of water in \u00b0C? 100\u00b0C<\/li>\n\n\n\n
  19. Boiling point of water in \u00b0F?
    212\u00b0F<\/li>\n\n\n\n
  20. 0\u00b0K is equal to \u00b0C? -273\u00b0C<\/li>\n\n\n\n
  21. The term Amphoteric means?
    A substance that can act as both a base & acid 22.
    What is Kelvin based around?
    2 \/ 4
    Absolute zero<\/li>\n\n\n\n
  22. A compound that is a Hydrogen or proton donor, corrosive to metals, causes blue litmus
    paper to become red and becomes less acidic when mixed with a base is? Acid<\/li>\n\n\n\n
  23. Mixture of 2 or more metals are?
    Alloys<\/li>\n<\/ol>\n\n\n\n
      \n
    1. Base?<\/li>\n<\/ol>\n\n\n\n
        \n
      • A Hydrogen or proton ACCEPTOR & has hydroxide group in the makeup of the
        molecule<\/li>\n\n\n\n
      • Produce -OH<\/li>\n\n\n\n
      • Bitter, slippery, conduct electricity, formulas contain -OH
        <\/li>\n\n\n\n
      • pH value greater than 7.0<\/li>\n\n\n\n
      • Proton acceptor<\/li>\n<\/ul>\n\n\n\n
          \n
        1. Key note:
          Acids are Proton donors as Bases are proton acceptors<\/li>\n\n\n\n
        2. Beta radiation:<\/li>\n<\/ol>\n\n\n\n
            \n
          • Decomposition product of a proton or neutron<\/li>\n\n\n\n
          • High speed\/energy Electrons<\/li>\n\n\n\n
          • EITHER – charged electrons or + charged positrons<\/li>\n\n\n\n
          • Can be stopped by aluminum foil<\/li>\n<\/ul>\n\n\n\n
              \n
            1. What is Biochemistry?
              Study of substances & processes occurring in living things<\/li>\n\n\n\n
            2. Fahrenheit is based off of? Body temperature<\/li>\n\n\n\n
            3. How does \u2191 Surface area speed up chemical reactions?
              By \u2191 areas of contact where chemical reactions can occur<\/li>\n\n\n\n
            4. How do catalyst accelerate a chemical reaction?
              By reducing the amount of energy needed for a reaction to occur<\/li>\n\n\n\n
            5. What does COOH symbolize? A Carboxyl group<\/li>\n\n\n\n
            6. Which of the following is not a solution type? Catalyst<\/li>\n\n\n\n
            7. Define Catalyst.
              Substance that speeds up a chemical reaction.<\/li>\n\n\n\n
            8. What is an atom called when it LOSES 1 or more electrons? Cations<\/li>\n\n\n\n
            9. What is chemical bonding?
              The joining of atoms to form new substances. 2 types: ionic & covalent bonding<\/li>\n\n\n\n
            10. What is a Ionic bond?<\/li>\n<\/ol>\n\n\n\n
                \n
              • Electrical attraction between 2 oppositely charged atoms groups of atoms called ions<\/li>\n\n\n\n
              • (between metals & nonmetals)<\/li>\n<\/ul>\n\n\n\n
                  \n
                1. Ionic bonding?
                  Chemical bond that\u2019s formed when an atom transfers a electron to another atom. (steals)<\/li>\n\n\n\n
                2. Single Covalent bond?<\/li>\n<\/ol>\n\n\n\n
                    \n
                  • Chemical bond that shares 1 electron pair<\/li>\n\n\n\n
                  • Formed by non-metals<\/li>\n<\/ul>\n\n\n\n
                      \n
                    1. What are chemical reactions?
                      Making & breaking of chemical bonds, leading to changes in composition of matter<\/li>\n\n\n\n
                    2. Double Covalent bond?
                      When 2 electron pairs are shared 51.
                      Triple Covalent bond?
                      When 3 electron pairs are shared<\/li>\n\n\n\n
                    3. The following is an example of? Combustion reaction<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

                      HESI A2 CHEMISTRY V1\/V2 FILE<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-120033","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/120033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=120033"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/120033\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=120033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=120033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=120033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}