3. Find the mass percent of oxygen in ethanol, C_(2)H_(6)O
BaSO_(4) is used in diagnostic nuclear medicine techniques because it is highly insoluble. K_(sp)=1.5times 10^-9 25^circ C Calculate the molar solubility of the salt. What is the concentration of Ba2+ions in the saturated solution? [Ba^2+]=[?]times 10^[?]M
50. For which of the following cleaning issues are general purpose detergents effective? Dirt and grime on the walls Grease in the exhaust hood Baked on food on ovenware Mineral build-up on equipment
True or False: Isotope refers to the electrical charge of the electron. True False
When the following half reaction is balanced, how many electrons are present and are they on the reactants or products side of the equation? Ti^2+(aq)arrow TiO_(2)(s) Number of electrons: square Side of equation: square
Polar solutes are soluble in Multiple Choice most ionic solvents polar solvents nonpolar solvents More than one of these choices are correct. None of the choices are correct.
Calculate the pH of a 1.0times 10^-8 M aqueous solution of hydrochloric acid (HCl). Round your answer to 2 decimal places. square
58) Which substance below is an ionic solid? A) Cu(s) B) H_(2)O(s) C) MgO(s) D) C_(6)H_(12)O_(6)(s) E) none of the above
The radical is generated when chlorine radicals react with ozone. Calculate the maximum wavelength (in nanometers) required to break a Cl-Cl bond in Cl_(2) (the precursor to chlorine radicals)Round your answer to 3 significant digits. Note: Reference the Bond energies and Fundamental Constants tables for additional information. square nm
An industrial chemist studying bleaching and sterilizing prepares several hypochlorite buffers. Find the pH of 0.150 M HClO and 0.100 M NaCIO. Be sure your answer has the correct number of significant figures. Note: Reference the K_(a) of acids at 25^circ C table for additional information. pH=square
Which of the following alcohols will be used in this lab? Butanol Propanol Ethanol Methanol
Acidic dyes work best in low pH environments. are used for staining negatively charged molecular structures. are negatively charged and work best at low pH. are lipid soluble. are negatively charged.
How many protons does carbon have? 40 39.09 6 12
Measurements taken with a spectrometer require a __ to eliminate background readings from components other than what is being measured in the sample. Select one: a. sample b. replicate c. treatment d. blank
11. [Periodic Table and Periodic Law] Which of the following elements has the greatest tendency to attract electrons in a chemical bond? A. Carbon B. Oxygen C. Fluorine D. Nitrogen
-Develop possible solutions - Brainstorming - think of as many solutions as possible of \( \mathrm{CO}_{2} \) wooden car
8. Every chlorine atom has: 7 electrons 17 neutrons a mass number of 35 an atomic number of 17
1. $6P_{4}O_{10}+H_{2}O$ $3H_{3}PO_{4}$
What is the maximum number of electrons that can occupy a given orbital if they have different spins? 4 2 1 3
How will we know how many electrons are in each ATOM? Type your answer here
