6. What is a statement that summarizes a pattern found in

nature?

a. a scientific law

b. a fact

c. a scientific theory d. a hypothesis

Electrons are held in an atom by attraction to what particle or location? a. Attraction to the positively charged protons in the nucleus b. Attraction to the lowest electron shell c. Attraction to the magnetic neutrons in the nucleus d.

A quantity of gas has a volume if 400.0 ml when confined under a pressure of 600.0mm Hg. What will be the new volume of the gas if the pressure is reduced to 200.0 mm Hg at constant temperature

The unsaturated hydrocarbon butadiene (C4H6) dimerizes to 4-vinylcyclohexan (C8H12). When data collected in studies of the kinetics of this reaction were plotted against reaction time, plots of [C4H6] or ln[C4H6] produced curved lines, but the plot

A container with a fixed volume, filled with hydrogen gas at - 104c and 71.8 kPa is heated until the pressure reaches 225.9 kPa. What is the temperature of the hydrogen gas in degrees Celsius

Which compound forms from 2 parts of hydrogen and 1 part of oxygen?

For which of the following reactions is ΔHrxn equal to ΔHf of the product? You do not need to look up any values to answer this question. Select all that apply.

You have three molecules of glucose (3C^6H^12O^6). How many carbon atoms do you have?

If the arrangement of atoms in a substance changes

A certain element x has four isotopes. 5.845% of x has a mass of 53.93961 amu. 91.75% of x has a mass of 55.93494 amu. 2.123% of x has a mass of 56.93539 amu. 0.2820% of x has a mass of 57.93328 amu. what is the average atomic mass of element x?

Which of the following is a type of electromagnetic radiation? a. Electrons b. Neutrons C. Electromagnetic waves d. Helium nuclei