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1)Describe the term hypothesis.
2)What subatomic particles contribute to the atomic mass of an atom?
3)True or False. Your data will either prove or disprove your hypothesis.
4)Using the following information from the periodic table of elements for Nitrogen, determine the number valence electrons this atom contains when electrically neutral: Atomic number: 7; Atomic mass 14
5) Describe a polar covalent bond
Question- Make a sketch of the voltaic cell represented with the line notation. Write the overall balanced equation from the reaction and calculate the E°cell.
A patient is given a 58.0-mg dose of Iodine-131 to image the thyroid. This nuclide has half life = 8.0 days. What mass of the nuclide remains in the patient after 33.0 hours, when the thyroid scan is taken
a freezer is used to freeze 3.0 l of water completely into ice. the water and the freezer remain at a constant
Find out the heat capacity of a calorimeter 105mL of .25 NaCl solution is formed in the reaction HCl + NaOH; H2O + NaCl. Change in enthalpy is -57.86 kJ/mol as well as change in temperature is 3.8 C.
What is the specific heat capacity of 5.0 g of metal, if 200 J of heat raises the temperature of the metal 45 C
liquid water and nitrogen monoxide gas are produced from the reaction of 22.7 grams of ammonia gas with 53 grams of
If the mass of water surrounding the calorimeter was exactly 1000 g and the heat capacity of the bomb calorimeter was 1.75 kJ/oC, calculate the molar heat of combustion of CH3OH. The specific heat of water is 4.184 J/g·oC.
What would you observe in a sample which contains both silver and lead ions if the first precipitate (AgCl (s) and PbCl2 (s)) was not treated with hot water
use electron configurations to rationalize the octet cule. show how it works with covalent and ionic bonds
Two unknowns, X and Y, both having the molecular formula C4H8O, give the following results with four chemical tests. Propose a structure for X consistent with this information.
in this experiment several saturatedsolutions of borax will be saturated with a standard solution ofhcl. the titration
a sample of soil from a newly discovered caveis analyzed by a team of explorers. they find an element that is agood
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