Who discovered that a dense positively charged atomic nucleus is at the core of every atom? Ernest Rutherford Erwin Schrödinger Antoine Lavoisier John Dalton

What is the primary standard used in this experiment (name and formula) ? define a secondary standard

If the amount of atoms of each type on the left and right sides of a reaction differ, what must be done to balance it? A. It should be left alone B. Coefficients are placed in front of the reactants and/or products C.

The gas in a cylinder has a volume of 5 liters at a pressure of 114 kPa. The pressure of the gas is increased to 215 kPa. Assuming the temperature remains constant, what would the new volume be? ___ L

Which of the following most likely happens when the temperature of a gas increases? The number of collisions of gas particles remains same. The number of collisions of gas particles increases. The pressure of the gas remains same.

How many joules of energy are needed to change 37.5g of ice at 0.00 oC to water at 45.0oC? (Heat of fusion = 335J/g, Specific heat of liquid water = 4.184J/g. oC, Heat of vaporization = 2259 J/g

What does the symbol C p stand for?

Which of the following is not true of science? 1. Science offers proof of a claim 2. Science is a way of knowing 3. Science is a process 4. Science provides support or fails to provide support to claim

What happens to the velocity of a sound wave in air if the temperature of the air increases

Determine the [oh-] concentration of a 0.741 m koh solution at 25°c.

In the lab, students decomposed a sample of calcium carbonate by heating it over a Bunsen burner and collected carbon dioxide according to the following equation: CaCO3 (s) CaO (s) CO2 (g) (a) How many mL of carbon dioxide gas were generated by the