Reference no: EM131057275
Help me solve theses questions please
1. What is the first element on the periodic table?
2. What is the centre of an atom called?
3. True or false? Acids have a pH level below 7.
4. What is the main gas found in the air we breathe?
5. True or false? An electron carries a positive charge.
6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?
7. What is the chemical symbol for gold?
8. K is the chemical symbol for which element?
9. What orbits the nucleus of an atom?
10. At room temperature, what is the only metal that is in liquid form?
11. True or false? A neutron has no net electric charge.
12. A nuclear reaction where the nucleus of an atom splits into smaller parts is known as nuclear fission or nuclear fusion?
13. What is H20 more commonly known as?
14. What is the third most common gas found in the air we breathe?
15. What is the name given to substances that are initially involved in a chemical reaction?
16. True or false? Bases have a pH level below 7.
17. Is sodium hydroxide (NaOH) an acid or base?
18. Atoms of the same chemical element that have different atomic mass are known as?
19. True or false? A proton carries a positive charge.
20. What is the fourth most abundant element in the universe in terms of mass?
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Calculate the absorbance of the unknown
: An unknown solution containing a mixture of Red No. 3 and Green No. 3 has a %T of 34.1 at 524 nm and a %T of 50.7 at 628 nm. Calculate the Absorbance of the unknown at the two wavelengths.
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Two countries and companies explored
: Using the two countries and companies explored in Weeks Two and Six, write a paper of approximately 1,350 words in which you:
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What is the chemical symbol for gold
: 1. True or false? An electron carries a positive charge. 2. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?3. What is the chemical symbol for gold?
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Determine the slip factor using busemann''s method
: A centrifugal pump is used to raise water against a static head of 18.0 m. The suction and delivery pipes, both 0.15 m diameter, have, respectively, friction head losses amounting to 2.25 and 7.5 times the dynamic head.
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First element on the periodic table
: 1. What is the first element on the periodic table? 2. What is the centre of an atom called? 3. True or false? Acids have a pH level below 7.
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Create a change model conducive to your field
: Research the various change models used by organizations today. After assessing these models, create a change model conducive to your field, and that will work within your organization's culture.
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Molarity of the acetic acid solution
: If 35.7 mL of 0.220 MKOH is required to completely neutralize 26.0 mL of a HC2H3O2 solution, what is the molarity of the acetic acid solution?
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What was the initial concentration
: A 890 mL NaCl solution is diluted to a volume of 1.05 L and a concentration of 3.00 M. What was the initial concentration?
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Pressure of a mixture of nitrogen
: The pressure of a mixture of nitrogen, carbon dioxide, and oxygen is 150 kPa. What is the partial pressure of oxygen if the partial pressures of the nitrogen and carbon dioxide are 100 kPA and 24 kPa, respectively?
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