Other Chemistry Answers

2. Experiments have shown that carbon will bond with several different elements. Some examples are methane (CH4), Carbon Disulfide (CS2), Carbon Monoxide (CO). Which of the following answers best describes the Law of Multiple Proportions as it related to the bonding types in carbon as described above.

 A. Carbon follows the Law of Multiple Proportions; it is demonstrated in the above example by bonding to different elements in 4:2:1 ratios in the above compounds.

 B. Carbon follows the Law of Multiple Proportions; it is demonstrated by being able to bond to many different elements.

 C. Carbon does not follow the Law of Multiple Proportions because in the given example, a ratio of 1:3 is missing.

 D. Carbon does not follow the Law of Multiple Proportions solely based on the statement above; no examples are given where carbon bonds to the same element with different simple integer ratios.

The combustion of naphthalene (C10H8), which releases 5150.1kj/mol, is often use to calibrate calorimeters. A 1.05-g sample of naphthalene is burned in a calorimeter, producing a temperature rise of 3.86oC. Burning a 1.83-g sample of coal in the same calorimeter causes a temperature change of 4.90oC. What is the energy density of the coal?

1. An ionic bond is typically formed when valence electrons are transferred between a… (2) A) Halogen and non-metal B) Non-metal and metalloid C) Metal and metalloid D) Metal and non-metal
2. Bonding in hydrogen gas is an example of a… (2) A) Metallic bond B) Ionic bond C) Polar covalent bond D) Non-polar covalent bond 1.3 An atom with the highest electronegativity is… (2) A) Carbon B) Oxygen C) Chlorine D) Fluorine 1.4 A nucleophile is a… (2) A) Arrhenius acid B) Arrhenius base C) Lewis acid D) Lewis base 1.5 In contrast to a carbanion, a carbocation is… (2) A) An electrophile B) A Lewis acid C) Electron-deficient D) All of the above 1.6 An anti-clockwise circle in R/S designation corresponds to… (2) A) (R)-configuration B) (S)-configuration C) Both A and B D) None of the above

1. 85.0 mL of a solution of NaOH is diluted to a final volume of 290.0 mL and the new molarity is 0.0500 M. Calculate the original molarity of the base. 

M1*V1= M2*V2

How many grams of glucose (C6H12O6) are needed to prepare 100mL of a 5% glucose solution?

What is the precent by mass concentration of a solution that contains 5.03g of salt dissolved in 19.7g of water?

A photographic "stop bath" contains 160mL of pure acetic acid. HC2H3O2(1) in 650 mL solution. What is the v/v concentration of acetic acid in the stop bath?

An aerosol can contains gases under a pressure of 4.5 atm at 27 ◦C. If the can is left on a hot sandy beach, the pressure of the gases increases to 4.85 atm. What is the Celsius temperature on the beach?