4. In a mixture of hydrogen (H_(2)) and argon (Ar) gas, 15% of the total gas pressure is exerted by hydrogen. If the total pressure is 60 .0 atm, what pressure does the hydrogen exert? (Answer=9.0atm)
Which statement accurately describes part of the dissolving process of a polar solute in water? Solute molecules repel water molecules Water molecules surround solute molecules Water molecules are strongly attracted to nonpolar substances. Solute molecules remain concentrated in one part of the solvent
3. Write the formula for the following polyatomic ions. a. Calcium nitrate: b. Ammonium nitride: c. Sodium carbonate: d. Ammonium phosphate: e. Magnesium phosphate:
2. Write the name for the following ionic compounds. a. FeCl_(3) b. AgCl: c. ZnCl_(2)
8. Explain the rules used to assign oxidation numbers. __ 9. Why do some elements have multiple oxidation states? __
Which of the following is a possible way to describe the NO_(2) component in the reaction below? N_(2)(g)+2O_(2)(g)arrow 2NO_(2)(g) 1LNO_(2) 4 moles NO NO_(2) 2 molecules of NO_(2) 2 atoms NO_(2)
Question 1 (1 point) underline ( )H_(2)+underline ( )Cl_(2)arrow underline ( )HCl
3) (4 pts) Give the structures (condensed or line-angle structures) of the isomers of C_(4)H_(10) and name each.
(b) (15 points) If 32.05 ml of the NaOH standard are found to neutralize 25.00 ml of an unknown acid solution, determine the molarity of the unknown.
¿Cuáles son los conceptos básicos de la química? SELECCIONE TODAS LAS QUE CORRESPONDAN a Productos químicos b Reacciones químicas do Átomos y moléculas d Energía
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
